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[GNUnet-SVN] r904 - GNUnet GNUnet/src/applications/fs/ecrs GNUnet/src/ap
|
From: |
grothoff |
|
Subject: |
[GNUnet-SVN] r904 - GNUnet GNUnet/src/applications/fs/ecrs GNUnet/src/applications/fs/fsui GNUnet/src/applications/fs/lib GNUnet/src/applications/fs/module GNUnet/src/applications/fs/tools GNUnet/src/applications/gap GNUnet/src/include GNUnet/src/util GNUnet-docs/papers/ecrs gnunet-gtk/src |
|
Date: |
Mon, 13 Jun 2005 05:02:01 -0700 (PDT) |
Author: grothoff
Date: 2005-06-13 05:00:59 -0700 (Mon, 13 Jun 2005)
New Revision: 904
Modified:
GNUnet-docs/papers/ecrs/main.aux
GNUnet-docs/papers/ecrs/main.bbl
GNUnet-docs/papers/ecrs/main.blg
GNUnet-docs/papers/ecrs/main.dvi
GNUnet-docs/papers/ecrs/main.log
GNUnet-docs/papers/ecrs/main.pdf
GNUnet-docs/papers/ecrs/main.ps
GNUnet-docs/papers/ecrs/main.tex
GNUnet-docs/papers/ecrs/ref.bib
GNUnet/ChangeLog
GNUnet/src/applications/fs/ecrs/directory.c
GNUnet/src/applications/fs/ecrs/download.c
GNUnet/src/applications/fs/fsui/download.c
GNUnet/src/applications/fs/fsui/downloadtest.c
GNUnet/src/applications/fs/fsui/fsui.c
GNUnet/src/applications/fs/fsui/fsui.h
GNUnet/src/applications/fs/fsui/fsuitest.c
GNUnet/src/applications/fs/fsui/search.c
GNUnet/src/applications/fs/fsui/searchtest.c
GNUnet/src/applications/fs/fsui/upload.c
GNUnet/src/applications/fs/lib/fslib.c
GNUnet/src/applications/fs/module/fs.c
GNUnet/src/applications/fs/tools/gnunet-download.c
GNUnet/src/applications/fs/tools/gnunet-insert.c
GNUnet/src/applications/gap/gap.c
GNUnet/src/include/ecrs_core.h
GNUnet/src/include/fs.h
GNUnet/src/include/gnunet_gap_service.h
GNUnet/src/util/configuration.c
GNUnet/src/util/testconfig.conf
GNUnet/todo
gnunet-gtk/src/download.c
Log:
update
Modified: GNUnet/ChangeLog
===================================================================
--- GNUnet/ChangeLog 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/ChangeLog 2005-06-13 12:00:59 UTC (rev 904)
@@ -1,3 +1,8 @@
+Sat Jun 11 11:25:24 EST 2005
+ Fixed various problems with recursive upload
+ (thread stack size too small, wrong filenames
+ passed around, wrong list of filenames updated).
+
Sat Apr 2 01:54:23 EST 2005
Various bugfixes, some of them critical (segfaults,
protocol errors (resulting in failures to connect),
Modified: GNUnet/src/applications/fs/ecrs/directory.c
===================================================================
--- GNUnet/src/applications/fs/ecrs/directory.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/ecrs/directory.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -124,7 +124,8 @@
}
pos += mdSize;
count++;
- spcb(&fi, NULL, spcbClosure);
+ if (spcb != NULL)
+ spcb(&fi, NULL, spcbClosure);
ECRS_freeMetaData(fi.meta);
ECRS_freeUri(fi.uri);
}
Modified: GNUnet/src/applications/fs/ecrs/download.c
===================================================================
--- GNUnet/src/applications/fs/ecrs/download.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/ecrs/download.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -150,7 +150,9 @@
((size_t)st.st_size > filesize ) ) {
/* if exists and oversized, truncate */
if (truncate(filename, filesize) != 0) {
- LOG_FILE_STRERROR(LOG_FAILURE, "truncate", filename);
+ LOG_FILE_STRERROR(LOG_FAILURE,
+ "truncate",
+ filename);
return SYSERR;
}
}
@@ -165,10 +167,12 @@
fn[strlen(fn)-1] += i;
}
this->handles[i] = fileopen(fn,
- O_CREAT|O_RDWR,
- S_IRUSR|S_IWUSR );
+ O_CREAT|O_RDWR,
+ S_IRUSR|S_IWUSR );
if (this->handles[i] < 0) {
- LOG_FILE_STRERROR(LOG_FAILURE, "OPEN", fn);
+ LOG_FILE_STRERROR(LOG_FAILURE,
+ "OPEN",
+ fn);
freeIOC(this, NO);
FREE(fn);
return SYSERR;
@@ -1149,13 +1153,16 @@
GNUNET_ASSERT(filename != NULL);
fid = uri->data.chk;
- if (! ECRS_isFileUri(uri))
+ if (! ECRS_isFileUri(uri)) {
+ BREAK();
return SYSERR;
+ }
if (OK != createIOContext(&ioc,
ntohll(fid.file_length),
- filename))
+ filename)) {
return SYSERR;
+ }
rm = createRequestManager();
cronTime(&ctx.startTime);
Modified: GNUnet/src/applications/fs/fsui/download.c
===================================================================
--- GNUnet/src/applications/fs/fsui/download.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/download.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -23,6 +23,13 @@
* @brief download functions
* @author Krista Bennett
* @author Christian Grothoff
+ *
+ * BIG FIXME: the download code still has some very serious issues in
+ * particular with recursive downloads (and the tree model of them).
+ * This may result in segfaults on exit and other bad side-effects.
+ *
+ * Also, it spawns far, far too many concurrent threads (lots to be
+ * fixed, probably including a re-design to clean things up).
*/
#include "platform.h"
@@ -45,7 +52,6 @@
FSUI_DownloadList * parent);
static int triggerRecursiveDownload(const ECRS_FileInfo * fi,
- unsigned int anonymityLevel,
const HashCode512 * key,
FSUI_DownloadList * parent) {
int i;
@@ -82,7 +88,7 @@
strcat(fullName, filename);
FREE(filename);
startDownload(parent->ctx,
- anonymityLevel,
+ parent->anonymityLevel,
fi->uri,
fullName,
YES,
@@ -175,12 +181,16 @@
struct ECRS_MetaData * md;
FSUI_DownloadList * root;
+ totalBytes = ECRS_fileSize(dl->uri);
root = dl;
- while (root->parent != NULL)
+ while (root->parent != NULL) {
root = root->parent;
+ if (root != NULL) {
+ root->total += totalBytes;
+ }
+ }
GNUNET_ASSERT(dl->filename != NULL);
- totalBytes = ECRS_fileSize(dl->uri);
ret = ECRS_downloadFile(dl->uri,
dl->filename,
dl->anonymityLevel,
@@ -193,8 +203,8 @@
event.data.message = _("Download aborted.");
} else {
event.type = download_complete;
- event.data.DownloadProgress.total = totalBytes;
- event.data.DownloadProgress.completed = totalBytes;
+ event.data.DownloadProgress.total = root->total;
+ event.data.DownloadProgress.completed = root->completed;
event.data.DownloadProgress.last_offset = 0;
event.data.DownloadProgress.eta = cronTime(NULL);
event.data.DownloadProgress.last_block = NULL;
@@ -206,8 +216,6 @@
event.data.DownloadProgress.main_filename = root->filename;
event.data.DownloadProgress.main_uri = root->uri;
}
- dl->ctx->ecb(dl->ctx->ecbClosure,
- &event);
if ( (ret == OK) &&
(dl->is_recursive) &&
(dl->is_directory) ) {
@@ -251,6 +259,8 @@
(dl->signalTerminate != YES) )
gnunet_util_sleep(100);
}
+ dl->ctx->ecb(dl->ctx->ecbClosure,
+ &event);
if (dl->parent != NULL) {
/* notify parent that we're done */
MUTEX_LOCK(&dl->ctx->lock);
@@ -270,9 +280,11 @@
BREAK();
} else {
if (prev != NULL)
- prev->next = pos->subDownloadsNext;
+ prev->subDownloadsNext
+ = pos->subDownloadsNext;
else
- dl->parent->subDownloads = pos->subDownloadsNext;
+ dl->parent->subDownloads
+ = pos->subDownloadsNext;
}
MUTEX_UNLOCK(&dl->ctx->lock);
}
@@ -305,6 +317,7 @@
memset(dl, 0, sizeof(FSUI_DownloadList));
cronTime(&dl->startTime);
dl->signalTerminate = NO;
+ dl->threadStarted = NO;
dl->is_recursive = is_recursive;
dl->parent = parent;
dl->is_directory = SYSERR; /* don't know */
@@ -317,13 +330,14 @@
if (0 != PTHREAD_CREATE(&dl->handle,
(PThreadMain) &downloadThread,
dl,
- 16 * 1024)) {
+ 128 * 1024)) {
FREE(dl->filename);
ECRS_freeUri(dl->uri);
FREE(dl);
MUTEX_UNLOCK(&ctx->lock);
return SYSERR;
}
+ dl->threadStarted = YES;
if (parent != NULL) {
/* add to pending downloads of parent! */
dl->subDownloadsNext = parent->subDownloads;
Modified: GNUnet/src/applications/fs/fsui/downloadtest.c
===================================================================
--- GNUnet/src/applications/fs/fsui/downloadtest.c 2005-06-12 17:55:55 UTC
(rev 903)
+++ GNUnet/src/applications/fs/fsui/downloadtest.c 2005-06-13 12:00:59 UTC
(rev 904)
@@ -165,6 +165,7 @@
fn,
0,
YES,
+ NO,
meta,
kuri));
ECRS_freeUri(kuri);
Modified: GNUnet/src/applications/fs/fsui/fsui.c
===================================================================
--- GNUnet/src/applications/fs/fsui/fsui.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/fsui.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -548,7 +548,10 @@
freeDownloadList(dpos->subDownloads);
freeDownloadList(dpos->subDownloadsNext);
dpos->signalTerminate = YES;
- PTHREAD_JOIN(&dpos->handle, &unused);
+ if (dpos->threadStarted == YES) {
+ PTHREAD_JOIN(&dpos->handle, &unused);
+ dpos->threadStarted = NO;
+ }
ECRS_freeUri(dpos->uri);
FREE(dpos->filename);
for (i=dpos->completedDownloadsCount-1;i>=0;i--)
@@ -744,10 +747,18 @@
}
}
+#if 0
+ /* FIXME: severely broken:
+ - concurrency issue with FSUI_stop,
+ - does not take tree structure into
+ account (activeDownloads is more
+ than just a linked list!)
+ */
dpos = ctx->activeDownloads;
dprev = NULL;
while (dpos != NULL) {
- if (YES == dpos->signalTerminate) {
+ if ( (YES == dpos->signalTerminate) &&
+ (NO == PTHREAD_SELF_TEST(&dpos->handle)) ) {
PTHREAD_JOIN(&dpos->handle,
&unused);
dtmp = dpos->next;
@@ -769,6 +780,7 @@
dpos = dpos->next;
}
}
+#endif
MUTEX_UNLOCK(&ctx->lock);
}
Modified: GNUnet/src/applications/fs/fsui/fsui.h
===================================================================
--- GNUnet/src/applications/fs/fsui/fsui.h 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/fsui.h 2005-06-13 12:00:59 UTC (rev
904)
@@ -161,6 +161,8 @@
*/
int signalTerminate;
+ int threadStarted;
+
unsigned long long total;
unsigned long long completed;
Modified: GNUnet/src/applications/fs/fsui/fsuitest.c
===================================================================
--- GNUnet/src/applications/fs/fsui/fsuitest.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/fsuitest.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -155,6 +155,7 @@
fn,
0,
YES,
+ NO,
meta,
kuri));
ECRS_freeUri(kuri);
Modified: GNUnet/src/applications/fs/fsui/search.c
===================================================================
--- GNUnet/src/applications/fs/fsui/search.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/search.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -178,7 +178,7 @@
if (0 != PTHREAD_CREATE(&pos->handle,
(PThreadMain) &searchThread,
pos,
- 16 * 1024)) {
+ 32 * 1024)) {
LOG_STRERROR(LOG_ERROR, "PTHREAD_CREATE");
ECRS_freeUri(pos->uri);
FREE(pos);
Modified: GNUnet/src/applications/fs/fsui/searchtest.c
===================================================================
--- GNUnet/src/applications/fs/fsui/searchtest.c 2005-06-12 17:55:55 UTC
(rev 903)
+++ GNUnet/src/applications/fs/fsui/searchtest.c 2005-06-13 12:00:59 UTC
(rev 904)
@@ -166,6 +166,7 @@
fn,
0,
YES,
+ NO,
meta,
kuri));
ECRS_freeUri(kuri);
Modified: GNUnet/src/applications/fs/fsui/upload.c
===================================================================
--- GNUnet/src/applications/fs/fsui/upload.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/fsui/upload.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -253,7 +253,7 @@
meta = NULL;
utc->dir = prev;
ret = uploadDirectory(utc,
- dirName,
+ fn,
¤t,
&uri,
&meta);
@@ -348,6 +348,8 @@
event.type = upload_error;
event.data.message = _("Upload failed.\n");
}
+ utc->ctx->ecb(utc->ctx->ecbClosure,
+ &event);
if (utc->meta == NULL)
utc->meta = ECRS_createMetaData();
else
@@ -381,23 +383,18 @@
current.fiCount,
0);
- if (ret == OK) {
- event.type = upload_complete;
- event.data.UploadComplete.total = utc->main_total;
- event.data.UploadComplete.filename = utc->main_filename;
- event.data.UploadComplete.uri = uri;
- event.data.UploadComplete.eta = cronTime(NULL);
- event.data.UploadComplete.start_time = utc->start_time;
- event.data.UploadComplete.is_recursive = YES;
- event.data.UploadComplete.main_filename = utc->main_filename;
- } else {
+ if (ret != OK) {
event.type = upload_error;
event.data.message = _("Upload failed.\n");
- }
+ utc->ctx->ecb(utc->ctx->ecbClosure,
+ &event);
+ } /* for success, uploadDirectory sends event already! */
utc->filename = NULL;
} else {
event.type = upload_error;
event.data.message = _("Cannot upload directory without using
recursion.\n");
+ utc->ctx->ecb(utc->ctx->ecbClosure,
+ &event);
}
if (ret == OK) { /* publish top-level advertisements */
fi.meta = utc->meta;
@@ -438,8 +435,6 @@
uri,
utc->meta);
}
- utc->ctx->ecb(utc->ctx->ecbClosure,
- &event);
fi.uri = uri;
fi.meta = utc->meta;
FSUI_publishToCollection(utc->ctx,
@@ -513,7 +508,7 @@
if (0 != PTHREAD_CREATE(&tl->handle,
(PThreadMain) &uploadThread,
utc,
- 32 * 1024)) {
+ 128 * 1024)) {
LOG_STRERROR(LOG_ERROR, "PTHREAD_CREATE");
FREE(tl);
FREE(utc->main_filename);
@@ -581,7 +576,7 @@
if (0 != PTHREAD_CREATE(&tl->handle,
(PThreadMain) &uploadThread,
utc,
- 16 * 1024)) {
+ 128 * 1024)) {
LOG_STRERROR(LOG_ERROR, "PTHREAD_CREATE");
FREE(tl);
FREE(utc->main_filename);
Modified: GNUnet/src/applications/fs/lib/fslib.c
===================================================================
--- GNUnet/src/applications/fs/lib/fslib.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/lib/fslib.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -307,6 +307,7 @@
ri = MALLOC(size);
ri->header.size = htons(size);
ri->header.type = htons(AFS_CS_PROTO_INIT_INDEX);
+ ri->reserved = htonl(0);
ri->fileId = *fileHc;
memcpy(&ri[1], fn, fnSize);
@@ -439,11 +440,12 @@
*/
int FS_testIndexed(GNUNET_TCP_SOCKET * sock,
const HashCode512 * hc) {
- RequestInitIndex ri;
+ RequestTestindex ri;
int ret;
- ri.header.size = htons(sizeof(RequestInitIndex));
+ ri.header.size = htons(sizeof(RequestTestindex));
ri.header.type = htons(AFS_CS_PROTO_TESTINDEX);
+ ri.reserved = htonl(0);
ri.fileId = *hc;
if (OK != writeToSocket(sock,
&ri.header))
Modified: GNUnet/src/applications/fs/module/fs.c
===================================================================
--- GNUnet/src/applications/fs/module/fs.c 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/applications/fs/module/fs.c 2005-06-13 12:00:59 UTC (rev
904)
@@ -40,6 +40,7 @@
#include "querymanager.h"
#include "fs.h"
+#define EXTRA_CHECKS YES
typedef struct {
struct DHT_GET_RECORD * rec;
@@ -121,6 +122,10 @@
BREAK(); /* value failed verification! */
return SYSERR;
}
+#if EXTRA_CHECKS
+ if (closure != NULL)
+ return OK; /* was extra-check */
+#endif
dv = MALLOC(size);
dv->size = htonl(size);
@@ -334,6 +339,7 @@
ntohs(ri->header.size) - sizeof(RequestInsert) -
sizeof(Datastore_Value);
gw = MALLOC(size);
+ gw->reserved = 0;
gw->dc.size = htonl(size);
et = ntohll(ri->expiration);
/* expiration time normalization and randomization */
@@ -714,7 +720,12 @@
memcpy(&gw[1],
&value[1],
size - sizeof(GapWrapper));
-
+#if EXTRA_CHECKS
+ GNUNET_ASSERT(SYSERR != gapPut("CHECK",
+ key,
+ &gw->dc,
+ 0));
+#endif
if (ggc->resultCallback != NULL)
ret = ggc->resultCallback(key,
&gw->dc,
@@ -960,7 +971,24 @@
return NO;
}
+static void replyHashFunction(const DataContainer * content,
+ HashCode512 * id) {
+ const GapWrapper * gw;
+ unsigned int size;
+ size = ntohl(content->size);
+ if (size < sizeof(GapWrapper)) {
+ BREAK();
+ memset(id, 0, sizeof(HashCode512));
+ return;
+ }
+ gw = (const GapWrapper*) content;
+ hash(&gw[1],
+ size - sizeof(GapWrapper),
+ id);
+}
+
+
/**
* Initialize the FS module. This method name must match
* the library name (libgnunet_XXX => initialize_XXX).
@@ -1004,7 +1032,9 @@
dsGap.del = &gapDel;
dsGap.iterate = &gapIterate;
initQueryManager(capi);
- gap->init(&dsGap, &uniqueReplyIdentifier);
+ gap->init(&dsGap,
+ &uniqueReplyIdentifier,
+ &replyHashFunction);
if (dht != NULL) {
dsDht.closure = NULL;
Modified: GNUnet/src/applications/fs/tools/gnunet-download.c
===================================================================
--- GNUnet/src/applications/fs/tools/gnunet-download.c 2005-06-12 17:55:55 UTC
(rev 903)
+++ GNUnet/src/applications/fs/tools/gnunet-download.c 2005-06-13 12:00:59 UTC
(rev 904)
@@ -75,7 +75,7 @@
};
c = GNgetopt_long(argc,
argv,
- "a:cdh:H:L:o:RvV",
+ "a:cdhH:L:o:RvV",
long_options,
&option_index);
if (c == -1)
@@ -169,13 +169,13 @@
SEMAPHORE_UP(signalFinished);
break;
case download_complete:
- printf(_("\nDownload of file '%s' comlete. Speed was %8.3f kilobyte per
second.\n"),
+ printf(_("\nDownload of file '%s' complete. Speed was %8.3f kilobyte per
second.\n"),
event->data.DownloadProgress.filename,
(event->data.DownloadProgress.completed/1024.0) /
(((double)(cronTime(NULL)-(event->data.DownloadProgress.start_time -
1)))
/ (double)cronSECONDS) );
- if (event->data.DownloadProgress.completed
- == event->data.DownloadProgress.total) {
+ if (ECRS_equalsUri(event->data.DownloadProgress.main_uri,
+ event->data.DownloadProgress.uri) ) {
*ok = OK;
SEMAPHORE_UP(signalFinished);
}
Modified: GNUnet/src/applications/fs/tools/gnunet-insert.c
===================================================================
--- GNUnet/src/applications/fs/tools/gnunet-insert.c 2005-06-12 17:55:55 UTC
(rev 903)
+++ GNUnet/src/applications/fs/tools/gnunet-insert.c 2005-06-13 12:00:59 UTC
(rev 904)
@@ -152,7 +152,8 @@
if (0 == strcmp(event->data.UploadComplete.main_filename,
event->data.UploadComplete.filename)) {
postProcess(event->data.UploadComplete.uri);
- SEMAPHORE_UP(exitSignal);
+ if (exitSignal != NULL)
+ SEMAPHORE_UP(exitSignal);
}
break;
@@ -160,7 +161,8 @@
printf(_("\nError uploading file: %s\n"),
event->data.message);
errorCode = 1;
- SEMAPHORE_UP(exitSignal); /* always exit main? */
+ if (exitSignal != NULL)
+ SEMAPHORE_UP(exitSignal); /* always exit main? */
break;
default:
BREAK();
@@ -503,6 +505,7 @@
char * timestr;
int doIndex;
int ret;
+ Semaphore * es;
meta = ECRS_createMetaData();
if (SYSERR == initUtil(argc, argv, &parseOptions)) {
@@ -652,7 +655,9 @@
}
/* wait for completion */
SEMAPHORE_DOWN(exitSignal);
- SEMAPHORE_FREE(exitSignal);
+ es = exitSignal;
+ exitSignal = NULL;
+ SEMAPHORE_FREE(es);
/* shutdown */
FREE(filename);
Modified: GNUnet/src/applications/gap/gap.c
===================================================================
--- GNUnet/src/applications/gap/gap.c 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/src/applications/gap/gap.c 2005-06-13 12:00:59 UTC (rev 904)
@@ -454,6 +454,8 @@
*/
static UniqueReplyIdentifier uri;
+static ReplyHashFunction rhf;
+
/**
* The routing table. This table has entries for all
* queries that we have recently send out. It helps
@@ -1476,7 +1478,7 @@
HashCode512 hc1;
int i;
IndirectionTableEntry * ite;
-
+
#if EXTRA_CHECKS
/* verify data is valid */
uri(value,
@@ -1486,11 +1488,10 @@
/* check seen */
ite = &ROUTING_indTable_[computeRoutingIndex(primaryKey)];
- /* FIXME: this computation of the seen-ID
- includes the timeout (bad!) */
- hash(&value[1],
- ntohl(value->size) - sizeof(DataContainer),
- &hc);
+ if (rhf == NULL)
+ return OK; /* drop, not fully initialized! */
+ rhf(value,
+ &hc);
for (i=0;i<ite->seenIndex;i++)
if (equalsHashCode512(&hc,
&ite->seen[i]))
@@ -1687,36 +1688,40 @@
ite->successful_local_lookup_in_delay_loop = NO;
size = ntohs(msg->header.size) - sizeof(GAP_REPLY);
prio = 0;
- /* FIXME: this computation of contentHC
- includes the timeout, which is bad! */
- hash(&msg[1],
- size,
- &contentHC);
+ if (rhf == NULL)
+ return OK; /* not fully initialized! */
+ value = MALLOC(size + sizeof(DataContainer));
+ value->size = htonl(size + sizeof(DataContainer));
+ memcpy(&value[1],
+ &msg[1],
+ size);
+ rhf(value,
+ &contentHC);
+
/* FIRST: check if seen */
MUTEX_LOCK(&ite->lookup_exclusion);
for (i=0;i<ite->seenIndex;i++) {
if (equalsHashCode512(&contentHC,
&ite->seen[i])) {
MUTEX_UNLOCK(&ite->lookup_exclusion);
+ FREE(value);
return 0; /* seen before, useless */
}
}
MUTEX_UNLOCK(&ite->lookup_exclusion);
/* SECOND: check if valid */
- value = MALLOC(size + sizeof(DataContainer));
- value->size = htonl(size + sizeof(DataContainer));
- memcpy(&value[1],
- &msg[1],
- size);
ret = bs->put(bs->closure,
&msg->primaryKey,
value,
0);
if (ret == SYSERR) {
+ BREAK();
+ uri(value,
+ ANY_BLOCK,
+ &contentHC);
FREE(value);
- BREAK();
return SYSERR; /* invalid */
}
@@ -1800,13 +1805,15 @@
* @return SYSERR on error, OK on success
*/
static int init(Blockstore * datastore,
- UniqueReplyIdentifier uid) {
+ UniqueReplyIdentifier uid,
+ ReplyHashFunction rh) {
if (bs != NULL) {
BREAK();
return SYSERR;
}
bs = datastore;
uri = uid;
+ rhf = rh;
return OK;
}
Modified: GNUnet/src/include/ecrs_core.h
===================================================================
--- GNUnet/src/include/ecrs_core.h 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/src/include/ecrs_core.h 2005-06-13 12:00:59 UTC (rev 904)
@@ -142,6 +142,7 @@
unsigned int type;
KBlock kblock;
+
NBlock nblock;
} KNBlock;
Modified: GNUnet/src/include/fs.h
===================================================================
--- GNUnet/src/include/fs.h 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/src/include/fs.h 2005-06-13 12:00:59 UTC (rev 904)
@@ -59,6 +59,8 @@
*/
unsigned int anonymityLevel;
+ unsigned int reserved; /* for 64-bit alignment */
+
/**
* What are the queries?
*/
@@ -112,6 +114,8 @@
typedef struct {
CS_HEADER header;
+ unsigned int reserved;
+
/**
* What is the hash of the file that contains
* this block?
@@ -145,19 +149,19 @@
unsigned long long fileOffset;
/**
+ * What is the hash of the file that contains
+ * this block? Used by gnunetd for the name
+ * of the file in the on-demand datastore.
+ */
+ HashCode512 fileId;
+
+ /**
* What are the anonymity requirements for this content?
* Use 0 if anonymity is not required (enables direct
* sharing / DHT routing).
*/
unsigned int anonymityLevel;
- /**
- * What is the hash of the file that contains
- * this block? Used by gnunetd for the name
- * of the file in the on-demand datastore.
- */
- HashCode512 fileId;
-
} RequestIndex;
/**
@@ -195,6 +199,8 @@
typedef struct {
CS_HEADER header;
+ unsigned int reserved;
+
/**
* What is the hash of the file that should be
* unindexed?
@@ -211,6 +217,7 @@
*/
typedef struct {
DataContainer dc;
+ unsigned int reserved; /* for 64-bit alignment */
unsigned long long timeout;
} GapWrapper;
Modified: GNUnet/src/include/gnunet_gap_service.h
===================================================================
--- GNUnet/src/include/gnunet_gap_service.h 2005-06-12 17:55:55 UTC (rev
903)
+++ GNUnet/src/include/gnunet_gap_service.h 2005-06-13 12:00:59 UTC (rev
904)
@@ -43,6 +43,14 @@
const HashCode512 * primaryKey);
/**
+ * Given some content, compute the unique
+ * hash of the content that can then be used
+ * to sort out duplicates.
+ */
+typedef int (*ReplyHashFunction)(const DataContainer * data,
+ HashCode512 * hc);
+
+/**
* Functions of the GAP Service API.
*/
typedef struct {
@@ -54,7 +62,8 @@
* @return SYSERR on error, OK on success
*/
int (*init)(Blockstore * datastore,
- UniqueReplyIdentifier uri);
+ UniqueReplyIdentifier uri,
+ ReplyHashFunction rhf);
/**
* Perform a GET operation using 'key' as the key. Note that no
Modified: GNUnet/src/util/configuration.c
===================================================================
--- GNUnet/src/util/configuration.c 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/src/util/configuration.c 2005-06-13 12:00:59 UTC (rev 904)
@@ -327,7 +327,7 @@
* globally FOO is set to DIRECTORY.
*/
char * expandDollar(const char * section,
- char * orig) {
+ char * orig) {
int i;
char * prefix;
char * result;
@@ -346,6 +346,8 @@
prefix = getConfigurationString("GNUNETD", &orig[1]);
if (prefix == NULL)
prefix = getConfigurationString("GNUNET", &orig[1]);
+ if (prefix == NULL)
+ prefix = getConfigurationString("", &orig[1]);
if (prefix == NULL) {
orig[i] = DIR_SEPARATOR;
return orig;
@@ -450,7 +452,7 @@
} else {
expCfgName = expandFileName(cfgName);
}
- FREE(eName);
+ FREENONNULL(eName);
if (0 == assertIsFile(expCfgName)) {
FILE * f;
char * c;
@@ -599,8 +601,6 @@
UserConf * pos;
char * retval;
- if ( !(section != NULL) && (option != NULL) )
- BREAK();
GNUNET_ASSERT( (section != NULL) && (option != NULL) );
MUTEX_LOCK(&configLock);
pos = userconfig;
Modified: GNUnet/src/util/testconfig.conf
===================================================================
--- GNUnet/src/util/testconfig.conf 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/src/util/testconfig.conf 2005-06-13 12:00:59 UTC (rev 904)
@@ -1,3 +1,4 @@
+[GNUNET]
SUBST=hello
GNUNET_HOME=/tmp
Modified: GNUnet/todo
===================================================================
--- GNUnet/todo 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet/todo 2005-06-13 12:00:59 UTC (rev 904)
@@ -1,5 +1,4 @@
0.7.0pre3:
-- FSUI: directory creation (uploadAll) broken! [ empty directories! ]
- gnunet-gtk (debug)
- gnunet-setup: [Nils]
* gconfig: fix focus changes
@@ -7,13 +6,10 @@
known to be working.
0.7.0 [6'05?] (aka "compatibility? what's that?"):
+- FSUI: recursive directory download crashes (i.e. on exit)
- Missing Features:
* resolve "FIXME 0.7": only sqlite magic factor missing! [Nils]
* #593 (gnunet-setup): php-ification for i18n [ Nils ]
- * cache kblock-public/private keys
- (terribly important, performance sucks already, but
- without caching it'll be unbearable, espeically for
- insertion of zip files with hundreds of files/keywords!)
* permissions on indexed files? [Nils]
* Windows installer [Nils]
* Uninstall
@@ -51,6 +47,10 @@
- Documentation:
* LJ article
- support using -k multiple times in gnunet-pseudonym
+- maybe: cache kblock-public/private keys
+ (1024 bit keys are much better than the 2048 bit keys,
+ but this would give another performance boost, especially for
+ insertion of zip files with hundreds of files/keywords!)
1.0.0 (aka "userfriendly"):
- implement testbed for profiling
Modified: GNUnet-docs/papers/ecrs/main.aux
===================================================================
--- GNUnet-docs/papers/ecrs/main.aux 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.aux 2005-06-13 12:00:59 UTC (rev 904)
@@ -15,6 +15,11 @@
address@hidden {author}{Christian Grothoff\unskip {}, Krista Grothoff\unskip
{}, Tzvetan Horozov\unskip {}, Jussi T. Lindgren\unskip {}}{1}{chapter.1}}
address@hidden {section}{\numberline {1}Introduction}{1}{section.1.1}}
\citation{dingledine02mixminion,syverson97anonymous}
+\citation{perng2005csr}
+\citation{perng2005csr}
+\citation{perng2005csr}
+\citation{clark99distributed}
+\citation{farsite}
\citation{ebe2003}
\citation{clark99distributed}
\citation{clark99distributed}
@@ -23,74 +28,75 @@
\citation{anderson96eternity,chen99prototype,clark99distributed,freehaven-berk,feamster-infranet,herlihy87how,waldman2001tangler,pub00}
\citation{cohen02replication}
\citation{clark99distributed}
address@hidden {section}{\numberline {2}Related Work}{3}{section.1.2}}
-\newlabel{related}{{2}{3}{Related Work\relax }{section.1.2}{}}
address@hidden {section}{\numberline {2}Related Work}{4}{section.1.2}}
+\newlabel{related}{{2}{4}{Related Work\relax }{section.1.2}{}}
address@hidden {subsection}{\numberline {2.1}Freenet}{4}{subsection.1.2.1}}
\citation{freehaven-berk}
\citation{rabin89efficient}
address@hidden {subsection}{\numberline {2.1}Freenet}{4}{subsection.1.2.1}}
address@hidden {subsection}{\numberline {2.2}Free Haven}{4}{subsection.1.2.2}}
\citation{mojotech}
address@hidden {subsection}{\numberline {2.2}Free Haven}{5}{subsection.1.2.2}}
address@hidden {subsection}{\numberline {2.3}Mnet and Mojo
Nation}{5}{subsection.1.2.3}}
\citation{pub00}
\citation{shamir}
\citation{waldman2001tangler}
address@hidden {subsection}{\numberline {2.3}Mnet and Mojo
Nation}{5}{subsection.1.2.3}}
address@hidden {subsection}{\numberline {2.4}Publius}{5}{subsection.1.2.4}}
address@hidden {subsection}{\numberline {2.5}Tangler}{5}{subsection.1.2.5}}
\citation{shamir}
address@hidden {subsection}{\numberline {2.4}Publius}{6}{subsection.1.2.4}}
address@hidden {subsection}{\numberline {2.5}Tangler}{6}{subsection.1.2.5}}
\citation{cfs:sosp01,mazires00sfs,mazieres02building,muthitacharoen02ivy,rowstron01storage}
\citation{cfs:sosp01,rowstron01storage}
\citation{maymounkov02kademlia,stoica01chord}
\citation{mazires00sfs}
\citation{mazieres02building}
address@hidden {subsection}{\numberline {2.6}Gnutella and
FastTrack}{6}{subsection.1.2.6}}
address@hidden {subsection}{\numberline {2.7}Distributed File
Systems}{6}{subsection.1.2.7}}
\citation{stratton_oakmont}
address@hidden {subsection}{\numberline {2.6}Gnutella and
FastTrack}{7}{subsection.1.2.6}}
address@hidden {subsection}{\numberline {2.7}Distributed File
Systems}{7}{subsection.1.2.7}}
address@hidden {section}{\numberline {3}ECRS encoding}{7}{section.1.3}}
+\newlabel{content}{{3}{7}{ECRS encoding\relax }{section.1.3}{}}
\citation{hartman99swarm}
\citation{ebe2003}
address@hidden {section}{\numberline {3}ECRS encoding}{7}{section.1.3}}
-\newlabel{content}{{3}{7}{ECRS encoding\relax }{section.1.3}{}}
\citation{mckusick84fast}
\citation{merkle89tree}
address@hidden {subsection}{\numberline {3.1}Overview}{8}{subsection.1.3.1}}
\citation{clark99distributed}
address@hidden {figure}{\numberline {1}{\ignorespaces Simple encoding of a file
using a tree of CHK blocks ($DBlock$s and $IBlock$s are CHK encoded) with one
$KBlock$ to allow for a keyword-based search.}}{8}{figure.1.1}}
-\newlabel{encodingfile}{{1}{8}{ECRS encoding\relax }{figure.1.1}{}}
address@hidden {subsection}{\numberline {3.1}Overview}{8}{subsection.1.3.1}}
address@hidden {figure}{\numberline {1}{\ignorespaces Simple encoding of a file
using a tree of CHK blocks ($DBlock$s and $IBlock$s are CHK encoded) with one
$KBlock$ to allow for a keyword-based search.}}{9}{figure.1.1}}
+\newlabel{encodingfile}{{1}{9}{ECRS encoding\relax }{figure.1.1}{}}
address@hidden {subsection}{\numberline {3.2}{\em
DBlocks}}{9}{subsection.1.3.2}}
\newlabel{dblocks}{{3.2}{9}{{\em DBlocks}\relax }{subsection.1.3.2}{}}
address@hidden {subsection}{\numberline {3.3}{\em
IBlocks}}{9}{subsection.1.3.3}}
\newlabel{iblocks}{{3.3}{9}{{\em IBlocks}\relax }{subsection.1.3.3}{}}
address@hidden {subsection}{\numberline {3.4}Finding
files}{9}{subsection.1.3.4}}
-\newlabel{sec:search}{{3.4}{9}{Finding files\relax }{subsection.1.3.4}{}}
+\citation{secure2004goh}
\citation{clark99distributed}
address@hidden {subsection}{\numberline {3.5}Namespaces}{10}{subsection.1.3.5}}
-\newlabel{sblock}{{3.5}{10}{Namespaces\relax }{subsection.1.3.5}{}}
address@hidden {subsection}{\numberline {3.6}Keyword
search}{11}{subsection.1.3.6}}
-\newlabel{kblocks}{{3.6}{11}{Keyword search\relax }{subsection.1.3.6}{}}
address@hidden {subsection}{\numberline {3.7}Summary}{12}{subsection.1.3.7}}
address@hidden {section}{\numberline {4}Extensions}{12}{section.1.4}}
-\newlabel{extensions}{{4}{12}{Extensions\relax }{section.1.4}{}}
-\citation{le2005}
address@hidden {subsection}{\numberline {3.4}Finding
files}{10}{subsection.1.3.4}}
+\newlabel{sec:search}{{3.4}{10}{Finding files\relax }{subsection.1.3.4}{}}
address@hidden {subsection}{\numberline {3.5}Namespaces}{11}{subsection.1.3.5}}
+\newlabel{sblock}{{3.5}{11}{Namespaces\relax }{subsection.1.3.5}{}}
address@hidden {subsection}{\numberline {3.6}Keyword
search}{12}{subsection.1.3.6}}
+\newlabel{kblocks}{{3.6}{12}{Keyword search\relax }{subsection.1.3.6}{}}
\newlabel{split}{{2}{13}{Summary\relax }{Item.2}{}}
\newlabel{encryptStep}{{3}{13}{Summary\relax }{Item.3}{}}
address@hidden {figure}{\numberline {2}{\ignorespaces The ECRS encoding
algorithm.}}{13}{figure.1.2}}
\newlabel{ECRS}{{2}{13}{Summary\relax }{figure.1.2}{}}
address@hidden {figure}{\numberline {3}{\ignorespaces Example protocol for an
ECRS download.}}{13}{figure.1.3}}
-\newlabel{protocol}{{3}{13}{Summary\relax }{figure.1.3}{}}
address@hidden {subsection}{\numberline {4.1}Keyword
inference}{13}{subsection.1.4.1}}
-\newlabel{keywords}{{4.1}{13}{Keyword inference\relax }{subsection.1.4.1}{}}
address@hidden {subsection}{\numberline {3.7}Summary}{13}{subsection.1.3.7}}
+\citation{le2005}
address@hidden {figure}{\numberline {3}{\ignorespaces Example protocol for an
ECRS download.}}{14}{figure.1.3}}
+\newlabel{protocol}{{3}{14}{Summary\relax }{figure.1.3}{}}
address@hidden {section}{\numberline {4}Extensions}{14}{section.1.4}}
+\newlabel{extensions}{{4}{14}{Extensions\relax }{section.1.4}{}}
address@hidden {subsection}{\numberline {4.1}Keyword
inference}{14}{subsection.1.4.1}}
+\newlabel{keywords}{{4.1}{14}{Keyword inference\relax }{subsection.1.4.1}{}}
address@hidden {subsection}{\numberline {4.2}Directories}{14}{subsection.1.4.2}}
\citation{bloom}
address@hidden {subsection}{\numberline {4.2}Directories}{14}{subsection.1.4.2}}
address@hidden {subsection}{\numberline {4.3}Efficient lookups with bloom
filters}{14}{subsection.1.4.3}}
address@hidden {subsection}{\numberline {4.3}Efficient lookups with bloom
filters}{15}{subsection.1.4.3}}
address@hidden {section}{\numberline {5}Discussion}{15}{section.1.5}}
+\newlabel{discussion}{{5}{15}{Discussion\relax }{section.1.5}{}}
\citation{freehaven-berk,mojotech}
\citation{rabin89efficient}
address@hidden {section}{\numberline {5}Discussion}{15}{section.1.5}}
-\newlabel{discussion}{{5}{15}{Discussion\relax }{section.1.5}{}}
address@hidden {subsection}{\numberline {5.1}Attacks}{15}{subsection.1.5.1}}
address@hidden {subsection}{\numberline {5.1}Attacks}{16}{subsection.1.5.1}}
\citation{levien03advogato}
\citation{esed}
address@hidden {subsection}{\numberline {5.2}{\em KBlocks} or
triple-hash}{16}{subsection.1.5.2}}
address@hidden {section}{\numberline {6}Conclusion}{17}{section.1.6}}
-\newlabel{conclusion}{{6}{17}{Conclusion\relax }{section.1.6}{}}
address@hidden {subsection}{\numberline {5.2}{\em KBlocks} or
triple-hash}{17}{subsection.1.5.2}}
address@hidden {section}{\numberline {6}Conclusion}{18}{section.1.6}}
+\newlabel{conclusion}{{6}{18}{Conclusion\relax }{section.1.6}{}}
\bibstyle{plain}
\bibdata{ref}
\bibcite{anderson96eternity}{1}
@@ -102,24 +108,27 @@
\bibcite{cfs:sosp01}{7}
\bibcite{dingledine02mixminion}{8}
\bibcite{freehaven-berk}{9}
-\bibcite{feamster-infranet}{10}
-\bibcite{ebe2003}{11}
-\bibcite{le2005}{12}
-\bibcite{hartman99swarm}{13}
-\bibcite{herlihy87how}{14}
-\bibcite{levien03advogato}{15}
-\bibcite{maymounkov02kademlia}{16}
-\bibcite{mazires00sfs}{17}
-\bibcite{mazieres02building}{18}
-\bibcite{mckusick84fast}{19}
-\bibcite{merkle89tree}{20}
-\bibcite{muthitacharoen02ivy}{21}
-\bibcite{rabin89efficient}{22}
-\bibcite{rowstron01storage}{23}
-\bibcite{shamir}{24}
-\bibcite{stoica01chord}{25}
-\bibcite{stratton_oakmont}{26}
-\bibcite{syverson97anonymous}{27}
-\bibcite{waldman2001tangler}{28}
-\bibcite{pub00}{29}
-\bibcite{mojotech}{30}
+\bibcite{farsite}{10}
+\bibcite{feamster-infranet}{11}
+\bibcite{secure2004goh}{12}
+\bibcite{ebe2003}{13}
+\bibcite{le2005}{14}
+\bibcite{hartman99swarm}{15}
+\bibcite{herlihy87how}{16}
+\bibcite{levien03advogato}{17}
+\bibcite{maymounkov02kademlia}{18}
+\bibcite{mazires00sfs}{19}
+\bibcite{mazieres02building}{20}
+\bibcite{mckusick84fast}{21}
+\bibcite{merkle89tree}{22}
+\bibcite{muthitacharoen02ivy}{23}
+\bibcite{perng2005csr}{24}
+\bibcite{rabin89efficient}{25}
+\bibcite{rowstron01storage}{26}
+\bibcite{shamir}{27}
+\bibcite{stoica01chord}{28}
+\bibcite{stratton_oakmont}{29}
+\bibcite{syverson97anonymous}{30}
+\bibcite{waldman2001tangler}{31}
+\bibcite{pub00}{32}
+\bibcite{mojotech}{33}
Modified: GNUnet-docs/papers/ecrs/main.bbl
===================================================================
--- GNUnet-docs/papers/ecrs/main.bbl 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.bbl 2005-06-13 12:00:59 UTC (rev 904)
@@ -57,12 +57,23 @@
Enhancing Technologies: Workshop on Design Issues in Anonymity and
Unobservability}. Springer-Verlag, LNCS 2009, July 2000.
+\bibitem{farsite}
+John~R. Douceur, Atul Adya, Wiliam~J. Bolosky, Dan Simon, and Marvin Theimer.
+\newblock Reclaiming space from duplicate files in a serverless distributed
+ file system.
+\newblock Technical report, Microsoft Research, 2002.
+
\bibitem{feamster-infranet}
Nick Feamster, Magdalena Balazinska, Greg Harfst, Hari Balakrishnan, and David
Karger.
\newblock Infranet: Circumventing web censorship and surveillance.
\newblock In {\em {11th USENIX Security Symposium}}, 2002.
+\bibitem{secure2004goh}
+Eu-Jin Goh.
+\newblock Secure indexes.
+\newblock In {\em Cryptology ePrint Archive}, Oct 2003.
+
\bibitem{ebe2003}
Christian Grothoff.
\newblock {An Excess-Based Economic Model for Resource Allocation in
@@ -125,6 +136,12 @@
\newblock In {\em Proceedings of 5th Symposium on Operating Systems Design and
Implementation}, 2002.
+\bibitem{perng2005csr}
+Ginger Perng, Michael~K. Reiter, and Chenxi Wang.
+\newblock Censorship resistance revisited.
+\newblock In Jordi Herrera-Joancomarti, editor, {\em Pre-Proceedings of the 7th
+ International Workshop on Information Hiding}, pages 279--293, 2005.
+
\bibitem{rabin89efficient}
Michael~O. Rabin.
\newblock Efficient dispersal of information for security, load balancing, and
Modified: GNUnet-docs/papers/ecrs/main.blg
===================================================================
--- GNUnet-docs/papers/ecrs/main.blg 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.blg 2005-06-13 12:00:59 UTC (rev 904)
@@ -2,44 +2,44 @@
The top-level auxiliary file: main.aux
The style file: plain.bst
Database file #1: ref.bib
-You've used 30 entries,
+You've used 33 entries,
2118 wiz_defined-function locations,
- 666 strings with 9154 characters,
-and the built_in function-call counts, 10588 in all, are:
-= -- 1015
-> -- 462
-< -- 14
-+ -- 187
-- -- 152
-* -- 656
-:= -- 1676
-add.period$ -- 96
-call.type$ -- 30
-change.case$ -- 163
+ 682 strings with 9615 characters,
+and the built_in function-call counts, 11647 in all, are:
+= -- 1111
+> -- 519
+< -- 15
++ -- 209
+- -- 171
+* -- 722
+:= -- 1852
+add.period$ -- 105
+call.type$ -- 33
+change.case$ -- 182
chr.to.int$ -- 0
-cite$ -- 30
-duplicate$ -- 478
-empty$ -- 913
-format.name$ -- 152
-if$ -- 2326
+cite$ -- 33
+duplicate$ -- 523
+empty$ -- 998
+format.name$ -- 171
+if$ -- 2553
int.to.chr$ -- 0
-int.to.str$ -- 30
-missing$ -- 27
-newline$ -- 152
-num.names$ -- 64
-pop$ -- 223
+int.to.str$ -- 33
+missing$ -- 29
+newline$ -- 167
+num.names$ -- 72
+pop$ -- 247
preamble$ -- 1
-purify$ -- 135
+purify$ -- 150
quote$ -- 0
-skip$ -- 340
+skip$ -- 372
stack$ -- 0
-substring$ -- 530
-swap$ -- 147
-text.length$ -- 14
+substring$ -- 573
+swap$ -- 160
+text.length$ -- 15
text.prefix$ -- 0
top$ -- 0
-type$ -- 120
+type$ -- 132
warning$ -- 0
-while$ -- 94
-width$ -- 32
-write$ -- 329
+while$ -- 103
+width$ -- 35
+write$ -- 361
Modified: GNUnet-docs/papers/ecrs/main.dvi
===================================================================
(Binary files differ)
Modified: GNUnet-docs/papers/ecrs/main.log
===================================================================
--- GNUnet-docs/papers/ecrs/main.log 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.log 2005-06-13 12:00:59 UTC (rev 904)
@@ -1,4 +1,4 @@
-This is pdfeTeX, Version 3.14159-1.10b-2.1 (Web2C 7.4.5) (format=pdflatex
2005.5.20) 3 JUN 2005 07:38
+This is pdfeTeX, Version 3.14159-1.10b-2.1 (Web2C 7.4.5) (format=pdflatex
2005.5.20) 11 JUN 2005 09:41
entering extended mode
**main.tex
(./main.tex{/usr/share/texmf/pdftex/config/pdftex.cfg}
@@ -491,21 +491,21 @@
\openout4 = `main.out'.
LaTeX Font Info: External font `cmex7' loaded for size
-(Font) <7> on input line 48.
+(Font) <7> on input line 81.
LaTeX Font Info: External font `cmex7' loaded for size
-(Font) <5> on input line 48.
-LaTeX Font Info: Try loading font information for U+msa on input line 48.
+(Font) <5> on input line 81.
+LaTeX Font Info: Try loading font information for U+msa on input line 81.
(/usr/share/texmf/tex/latex/amsfonts/umsa.fd
File: umsa.fd 2002/01/19 v2.2g AMS font definitions
)
-LaTeX Font Info: Try loading font information for U+msb on input line 48.
+LaTeX Font Info: Try loading font information for U+msb on input line 81.
(/usr/share/texmf/tex/latex/amsfonts/umsb.fd
File: umsb.fd 2002/01/19 v2.2g AMS font definitions
)
LaTeX Font Info: External font `cmex7' loaded for size
-(Font) <6> on input line 48.
+(Font) <6> on input line 81.
Package hyperref Warning: bookmark level for unknown title defaults to 0.
@@ -515,22 +515,22 @@
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
-(hyperref) removing `\unskip' on input line 48.
+(hyperref) removing `\unskip' on input line 81.
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
-(hyperref) removing `\unskip' on input line 48.
+(hyperref) removing `\unskip' on input line 81.
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
-(hyperref) removing `\unskip' on input line 48.
+(hyperref) removing `\unskip' on input line 81.
Package hyperref Warning: Token not allowed in a PDFDocEncoded string,
-(hyperref) removing `\unskip' on input line 48.
+(hyperref) removing `\unskip' on input line 81.
-Overfull \hbox (9.0264pt too wide) in paragraph at lines 50--62
+Overfull \hbox (9.0264pt too wide) in paragraph at lines 83--95
/cmr9/censor-ship-resistant peer-to-peer net-work-ing. The pro-posed en-cod-ing
mech-
[]
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[]/cmr9/Raph Levien. At-tack re-sis-tant trust met-rics. Draft avail-able at
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Modified: GNUnet-docs/papers/ecrs/main.pdf
===================================================================
(Binary files differ)
Modified: GNUnet-docs/papers/ecrs/main.ps
===================================================================
--- GNUnet-docs/papers/ecrs/main.ps 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.ps 2005-06-13 12:00:59 UTC (rev 904)
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-/version (1.100) readonly def
-/Notice (Copyright (C) 1997 American Mathematical Society. All Rights
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-/FamilyName (Computer Modern) readonly def
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-/FontName /CMMI10 def
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-/FontType 1 def
-/FontMatrix [0.001 0 0 0.001 0 0] readonly def
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SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.1) cvn H.B /DEST
pdfmark end
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SDict begin H.R end
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.clark99distributed) cvn H.B /ANN pdfmark end
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b(of)g(con)n(ten)n(t.)f(F)-7 b(reenet's)28 b(CHK)g(yields)f(the)i(same)
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y(encryptions.)g(Ho)n(w)n(ev)n(er,)f(it)i(has)f(sev)n(eral)e(disadv)-5
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b(Also,)h(F)-7 b(reenet)29 b(do)r(es)f(not)g(supp)r(ort)g(sw)n(arming.)
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b(reenet's)30 b(CHK)h(enco)r(ding)f(can)g(only)g(v)n(erify)g(a)g
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y(Giv)n(en)i(the)g(subspace-pre\014x)e(and)h(the)i(k)n(eyw)n(ord,)c
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SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.2) cvn H.B /DEST
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523
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(cite.freehaven-berk) cvn H.B /ANN pdfmark end
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b(able)f(to)h(exercise)e(editorial)h(con)n(trol)f(o)n(v)n(er)g(the)i
(con)n(ten)n(t)f(since)h(the)g(ID)n(A)g(do)r(es)f(not)523
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-(plain)n(text.)f(Also,)g(the)h Fq(k)i FA(out)e(of)f Fq(n)g
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(w)f(reconstruction)f(of)i(a)g(\014le)g(b)n(y)g(mixing)f(shares)523
-1346 y(from)c(indep)r(enden)n(t)i(insertions)e(with)h(di\013eren)n(t)f
-(v)-5 b(alues)28 b(for)f Fq(k)j FA(or)d Fq(n)p FA(.)523
-1517 y
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SDict begin H.S end
- 523 1517 a 523 1517 a
+ 523 4087 a 523 4087 a
SDict begin 12 H.A end
- 523 1517 a 523 1517 a
+ 523 4087 a 523 4087 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.3) cvn H.B /DEST
pdfmark end
523
-1517 a 85 x Fr(2.3)95 b(Mnet)31 b(and)h(Mo)5 b(jo)32
-b(Nation)523 1774 y FA(Mnet)d(is)f(the)g(successor)f(of)h(Mo)5
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SDict begin H.S end
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-2021 1721 a
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SDict begin H.R end
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+ 2021 4273 a 2021 4327 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.mojotech) cvn H.B /ANN pdfmark end
- 2021 1774 a Black
+ 2021 4327 a Black
FA(],)h(a)e(p)r(eer-to-p)r(eer)g(net)n(w)n(ork)g(that)h(w)n(as)g(the)
-523 1874 y(\014rst)d(to)g(fo)r(cus)g(on)f(using)h(economic)f(incen)n
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(tiv)n(es)g(when)h(trading)g(con)n(ten)n(t.)f(As)h(the)h(descen-)523
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g(mostly)g(on)g(e\016ciency)h(and)f(reliabilit)n(y)-7
-b(.)523 2073 y(Nev)n(ertheless,)31 b(Mnet)i(encrypts)e(\014les)h(with)h
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(AES)f(using)g(a)f(user-supplied)h(k)n(ey)f(to)h(allo)n(w)523
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(en)f(in)n(to)g(shares)f(using)h(an)h(erasure)e(co)r(de.)h(Multiple)523
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(and)g(stored)g(in)h(an)f(ino)r(de.)g(The)h(\014le)g(can)f(b)r(e)523
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-y(The)30 b(use)g(of)g(whole-\014le)f(AES)h(encryption)g(and)g(the)g
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-y(Mnet,)25 b(just)f(lik)n(e)g(F)-7 b(reenet,)24 b(to)g(store)f(a)h
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+ 523 232 a Black Fx(6)237 b(C.)27
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(\014le)h(on)f(request.)f(The)h(free)g(selection)g(of)g(the)h(AES)523
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(completely)g(di\013eren)n(t)h(shares)e(for)h(iden)n(tical)523
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(t)g(is)g(a)f(p)r(erfectly)i(indep)r(enden)n(t)g(pass)e(o)n(v)n(er)523
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(and)g(F)-7 b(reenet's)32 b(enco)r(ding)f(could)g(b)r(e)h(easily)523
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y(certain)27 b(st)n(yle)g(of)h(AES)f(encryption.)523
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SDict begin 12 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.4) cvn H.B /DEST
pdfmark end
523
-3441 a 85 x Fr(2.4)95 b(Publius)523 3698 y FA(Publius)23
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SDict begin H.S end
- 843 3698 a 0 1 0 TeXcolorrgb
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SDict begin H.R end
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a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.pub00) cvn H.B /ANN pdfmark end
- 926 3698 a Black FA(])h(is)g(a)f(static)g(net)n(w)n(ork)f(that)i
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(uses)f(Shamir's)g(algorithm)g([)p 0 1 0 TeXcolorrgb
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SDict begin H.S end
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SDict begin H.R end
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.shamir) cvn H.B /ANN pdfmark end
2819
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y(required)j(to)g(restore)g(stored)g(\014les)g(b)r(et)n(w)n(een)h(the)g
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(ers)d(cannot)i(decrypt)g(the)h(\014le)f(as)g(the)g(k)n(ey)g(is)523
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y(Publius)34 b(k)n(eys)g(are)g(random)g(strings.)g(The)h(system)g(do)r
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y(mec)n(hanism)c(and)h(exp)r(ects)f(the)h(users)f(to)h(obtain)f(the)h
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(er)e(discards)h(an)n(y)g(con)n(ten)n(t)g(and)h(th)n(us)g(assumes)e
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-4551 y
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SDict begin H.S end
- 523 4551 a 523 4551 a
+ 523 2616 a 523 2616 a
SDict begin 12 H.A end
- 523 4551 a 523 4551 a
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SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.5) cvn H.B /DEST
pdfmark end
523
-4551 a 101 x Fr(2.5)95 b(T)-8 b(angler)523 4825 y FA(The)31
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b(T)-7 b(angler)30 b(net)n(w)n(ork)f([)p 0 1 0 TeXcolorrgb
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SDict begin H.S end
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-TeXcolorrgb 1428 4771 a
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SDict begin H.R end
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.waldman2001tangler) cvn H.B /ANN pdfmark end
1428
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b(This)g(en)n(tanglemen)n(t)g(in)n(tro)r(duces)g(a)g(dep)r(endency)h
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-TeXDict begin 6 5 bop 0 0 a
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+SDict begin H.S end
+
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+SDict begin H.R end
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+SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
+(cite.shamir) cvn H.B /ANN pdfmark end
+ 2545 4127 a Black
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@@ -6065,380 +6235,243 @@
232 a
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523 232 a 523 232 a
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-1345 y(in)n(tegrit)n(y)h(c)n(hec)n(ks)g(on)g(\014xed-size)h(blo)r(c)n
-(ks)f(of)h(data.)f(A)i(di\013erence)e(with)i(ECRS)f(is)f(that)i(the)523
-1445 y(T)-7 b(angler)33 b(enco)r(ding)h(uses)g(Shamir's)g(secret)g
-(sharing)f([)p 0 1 0 TeXcolorrgb 2283 1445 a
+ 523 232 a Black 1036 w Fx(An)25
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SDict begin H.S end
- 2283 1445
-a 0 1 0 TeXcolorrgb FA(24)p 0 1 0 TeXcolorrgb 2366 1391
-a
-SDict begin H.R end
- 2366 1391 a 2366 1445 a
-SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
-(cite.shamir) cvn H.B /ANN pdfmark end
- 2366 1445 a Black FA(])h(to)g(en)n(tangle)g
-(the)h(blo)r(c)n(k)e(with)523 1544 y(other,)28 b(pre-existing)g(blo)r
-(c)n(ks,)g(preferably)g(from)g(other)g(do)r(cumen)n(ts.)h(similarit)n
-(y)f(b)r(et)n(w)n(een)523 1644 y(T)-7 b(angler,)34 b(F)-7
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-(cryptographically)e(signed)h(data,)523 1744 y(whic)n(h)25
-b(T)-7 b(angler)23 b(calls)h(collections.)g(T)-7 b(angler's)24
-b(collections)g(are)f(analogous)g(to)h(directories)523
-1843 y(and)31 b(namespaces)f(in)h(ECRS.)g(The)h(ma)5
-b(jor)30 b(di\013erence)h(is)g(that)g(in)h(T)-7 b(angler)30
-b(a)h(collection)523 1943 y(has)23 b(a)g(v)n(ersioned)f(ro)r(ot)h(whic)
-n(h)g(explicitly)h(lists)g(all)f(of)g(the)h(con)n(ten)n(ts)f(in)h(the)g
-(collection,)f(re-)523 2042 y(sulting)h(in)h(one)f(of)g(T)-7
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-(do)r(cumen)n(t)523 2142 y(in)31 b(a)g(F)-7 b(reenet)31
-b(subspace)f(or)g(ECRS)h(namespace)f(only)h(requires)f(that)h(it)g(b)r
-(e)h(adequately)523 2242 y(signed.)523 2408 y
-SDict begin H.S end
- 523 2408
-a 523 2408 a
+ 523 365 a 523 365 a
SDict begin 12 H.A end
- 523 2408 a 523 2408 a
+ 523 365 a 523
+365 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.6) cvn H.B /DEST
pdfmark end
- 523 2408 a 83 x Fr(2.6)95
-b(Gn)m(utella)31 b(and)h(F)-8 b(astT)g(rac)m(k)523 2658
-y FA(The)31 b(F)-7 b(astT)g(rac)n(k)28 b(net)n(w)n(ork)p
-1 0 0 TeXcolorrgb 1376 2658 a
+ 523 365 a 83 x Fq(2.6)95 b(Gn)m(utella)31 b(and)h(F)-8
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+b(net)n(w)n(ork)p 1 0 0 TeXcolorrgb 1376 594 a
SDict begin H.S end
- 1376 2658 a -30 x Fz(1)1412
-2658 y
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SDict begin 12 H.L end
- 1412 2658 a 1412 2658 a
+ 1412 594 a 1412 594 a
SDict begin [ /Subtype /Link /Dest (Hfootnote.1) cvn /H /I /Border
[0 0 0] /Color [1 0 0] H.B /ANN pdfmark end
- 1412 2658 a Black 31 w
-FA(and)i(mo)r(dern)g(v)-5 b(arian)n(ts)29 b(of)i(the)g(Gn)n(utella)f
-(proto)r(col)f(use)i(the)523 2757 y(SHA-1)f(hash)f(co)r(de)g(of)h(the)g
-(shared)f(\014les)g(to)h(uniquely)f(iden)n(tify)i(\014les.)e(The)h
-(SHA-1)f(hash)523 2857 y(co)r(des)d(are)f(used)i(to)f(iden)n(tify)h
-(iden)n(tical)f(\014les)g(stored)g(on)g(di\013eren)n(t)g(p)r(eers.)g
-(The)g(p)r(eers)g(can)523 2957 y(then)d(use)g(this)g(information)f(to)h
-(do)n(wnload)f(the)h(\014le)g(from)f(m)n(ultiple)i(sources)d(\(sw)n
-(arming\).)523 3056 y(The)41 b(problem)f(with)h(this)f(approac)n(h)f
-(is)h(that)h(the)g(SHA-1)f(hash)g(co)r(des)g(can)h(only)f(b)r(e)523
-3156 y(v)n(eri\014ed)23 b(once)h(the)h(en)n(tire)f(\014le)g(has)g(b)r
-(een)g(retriev)n(ed.)f(T)-7 b(o)24 b(ruin)g(a)g(do)n(wnload,)f(it)i
-(su\016ces)f(for)523 3255 y(a)29 b(malicious)f(p)r(eer)i(to)f(con)n
+ 1412 594
+a Black 31 w FA(and)i(mo)r(dern)g(v)-5 b(arian)n(ts)29
+b(of)i(the)g(Gn)n(utella)f(proto)r(col)f(use)i(the)523
+693 y(SHA-1)f(hash)f(co)r(de)g(of)h(the)g(shared)f(\014les)g(to)h
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+793 y(co)r(des)d(are)f(used)i(to)f(iden)n(tify)h(iden)n(tical)f
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+(can)523 893 y(then)d(use)g(this)g(information)f(to)h(do)n(wnload)f
+(the)h(\014le)g(from)f(m)n(ultiple)i(sources)d(\(sw)n(arming\).)523
+992 y(The)41 b(problem)f(with)h(this)f(approac)n(h)f(is)h(that)h(the)g
+(SHA-1)f(hash)g(co)r(des)g(can)h(only)f(b)r(e)523 1092
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(tribute)g(just)h(one)e(single)h(in)n(v)-5 b(alid)29
-b(blo)r(c)n(k.)g(The)h(presence)e(of)h(an)523 3355 y(in)n(v)-5
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b(alid)22 b(blo)r(c)n(k)f(could)g(only)h(b)r(e)g(detected)g(after)f
(the)h(en)n(tire)g(\014le)f(w)n(as)g(retriev)n(ed.)g(W)-7
-b(orse,)21 b(the)523 3455 y(simplistic)28 b(SHA-1)g(approac)n(h)f(do)r
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(es)g(not)i(giv)n(e)e(p)r(eers)g(an)n(y)h(w)n(a)n(y)f(to)h(iden)n(tify)
-g(the)h(lo)r(cation)523 3554 y(of)f(the)g(in)n(v)-5 b(alid)27
-b(blo)r(c)n(k)g(or)g(the)h(malicious)f(p)r(eer.)648 3654
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y(F)-7 b(astT)g(rac)n(k)19 b(and)j(Gn)n(utella)f(do)g(not)g(use)h
(neither)f(\014le)g(encryption.)g(Consequen)n(tly)g(they)523
-3754 y(do)30 b(not)g(pro)n(vide)f(an)n(y)g(protection)g(from)h
+1690 y(do)30 b(not)g(pro)n(vide)f(an)n(y)g(protection)g(from)h
(censorship)f(b)r(ey)n(ond)h(decen)n(tralized)f(routing)g(of)523
-3853 y(requests.)523 4019 y
+1789 y(requests.)523 1934 y
SDict begin H.S end
- 523 4019 a 523 4019 a
+ 523 1934 a 523 1934 a
SDict begin 12 H.A end
523
-4019 a 523 4019 a
+1934 a 523 1934 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.2.7) cvn H.B /DEST
pdfmark end
- 523 4019 a 84 x Fr(2.7)95 b(Distributed)31
-b(File)f(Systems)523 4269 y FA(V)-7 b(arious)21 b(distributed)i(\014le)
+ 523 1934 a 83 x Fq(2.7)95 b(Distributed)31
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g(systems)f(based)g(on)g(a)g(p)r(eer-to-p)r(eer)f(infrastructure)g(ha)n
-(v)n(e)h(b)r(een)523 4369 y(built)39 b(in)f(recen)n(t)f(y)n(ears)f([)p
-0 1 0 TeXcolorrgb 1342 4369 a
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SDict begin H.S end
- 1342 4369 a 0 1 0 TeXcolorrgb
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SDict begin H.R end
- 1384 4315 a 1384
-4369 a
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+2262 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.cfs:sosp01) cvn H.B /ANN pdfmark end
- 1384 4369 a Black FA(,)p 0 1 0 TeXcolorrgb 1407
-4369 a
+ 1384 2262 a Black FA(,)p 0 1 0 TeXcolorrgb 1407
+2262 a
SDict begin H.S end
- 1407 4369 a 0 1 0 TeXcolorrgb FA(17)p 0 1 0 TeXcolorrgb
-1490 4315 a
+ 1407 2262 a 0 1 0 TeXcolorrgb FA(19)p 0 1 0 TeXcolorrgb
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SDict begin H.R end
- 1490 4315 a 1490 4369 a
+ 1490 2209 a 1490 2262 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.mazires00sfs) cvn H.B /ANN pdfmark end
- 1490 4369 a Black
-FA(,)p 0 1 0 TeXcolorrgb 1513 4369 a
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SDict begin H.S end
- 1513 4369 a 0 1 0
-TeXcolorrgb FA(18)p 0 1 0 TeXcolorrgb 1596 4315 a
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SDict begin H.R end
1596
-4315 a 1596 4369 a
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.mazieres02building) cvn H.B /ANN pdfmark end
- 1596 4369 a Black FA(,)p 0 1 0 TeXcolorrgb
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SDict begin H.S end
- 1619 4369 a 0 1 0 TeXcolorrgb FA(21)p 0 1 0
-TeXcolorrgb 1702 4315 a
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SDict begin H.R end
- 1702 4315 a 1702 4369 a
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.muthitacharoen02ivy) cvn H.B /ANN pdfmark end
1702
-4369 a Black FA(,)p 0 1 0 TeXcolorrgb 1725 4369 a
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SDict begin H.S end
1725
-4369 a 0 1 0 TeXcolorrgb FA(23)p 0 1 0 TeXcolorrgb 1808
-4315 a
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SDict begin H.R end
- 1808 4315 a 1808 4369 a
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.rowstron01storage) cvn H.B /ANN pdfmark end
- 1808 4369 a Black FA(].)i(These)g
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(systems)f(t)n(ypically)h(do)f(not)h(fo)r(cus)g(on)523
-4468 y(censorship-resistance)g(and)j(consequen)n(tly)f(do)g(not)h
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-4532 a
-SDict begin H.S end
- 606 4532 a 0 TeXcolorgray 0 TeXcolorgray 606 4532
+2362 y(censorship-resistance)g(and)j(consequen)n(tly)f(do)g(not)h
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+y(systems)26 b(lik)n(e)g([)p 0 1 0 TeXcolorrgb 1004 2462
a
-SDict begin H.R end
- 606 4532 a 606 4532 a
-SDict begin [ /View [/XYZ H.V] /Dest (Hfootnote.1) cvn H.B /DEST pdfmark
-end
- 606 4532 a Black 92 x Fx(Proto)r(col)28
-b(description)e(from)g(the)g(giFT-F)-6 b(astT)g(rac)n(k)26
-b(pro)t(ject)h(is)f(a)n(v)l(ailable)h(at)p 0 1 0 0 TeXcolorcmyk
-689 4802 a
SDict begin H.S end
- 689 4802 a 0 1 0 0 TeXcolorcmyk -16 x Fw
-(http://gnunet.org/papers/FAST)q(-)t(TR)q(ACK-)5 b(PROTO)q(COL)p
-0 1 0 0 TeXcolorcmyk 2423 4734 a
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-a
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- 2423 4786 a Black Fx(.)p Black Black Black eop end
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- 0 0 a Black 0 TeXcolorgray
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-SDict begin H.S end
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-SDict begin H.R end
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-SDict begin [ /View [/XYZ H.V] /Dest (page.7) cvn H.B /DEST pdfmark
-end
- 523 232 a Black 1036 w Fx(An)25
-b(Enco)r(ding)h(for)h(Censorship-Resistan)n(t)f(Sharing)238
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-SDict begin H.S end
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-0 1 0 TeXcolorrgb 1045 395 a
-SDict begin H.R end
- 1045 395 a 1045 448 a
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(cite.cfs:sosp01) cvn H.B /ANN pdfmark end
- 1045
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(cite.rowstron01storage) cvn H.B /ANN pdfmark end
- 1152 448 a Black FA(])g(route)g(con)n(ten)n
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-TeXcolorrgb 2805 448 a
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+(using)g(distributed)g(hash)g(tables)g([)p 0 1 0 TeXcolorrgb
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SDict begin H.S end
- 2805 448 a 0 1 0 TeXcolorrgb FA(16)p
-0 1 0 TeXcolorrgb 2889 395 a
+ 2805 2462 a 0 1 0 TeXcolorrgb FA(18)p 0 1 0
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SDict begin H.R end
- 2889 395 a 2889 448 a
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.maymounkov02kademlia) cvn H.B /ANN pdfmark end
2889
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SDict begin H.S end
2912
-448 a 0 1 0 TeXcolorrgb FA(25)p 0 1 0 TeXcolorrgb 2995
-395 a
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- 2995 395 a 2995 448 a
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.stoica01chord) cvn H.B /ANN pdfmark end
- 2995 448 a Black FA(])g(to)g(ac)n(hiev)n(e)
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b(.)30 b(W)-7 b(ritable)32 b(distributed)g(\014le)f(systems)g(t)n
-(ypically)g(require)g(users)f(to)523 648 y(authen)n(ticate)25
+(ypically)g(require)g(users)f(to)523 2661 y(authen)n(ticate)25
b(themselv)n(es)g(b)r(efore)f(b)r(eing)i(gran)n(ted)e(access)f(to)i
-(the)h(system)f(b)n(y)g(one)g(of)g(the)523 747 y(serv)n(ers)33
-b([)p 0 1 0 TeXcolorrgb 827 747 a
+(the)h(system)f(b)n(y)g(one)g(of)g(the)523 2761 y(serv)n(ers)33
+b([)p 0 1 0 TeXcolorrgb 827 2761 a
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- 827 747 a 0 1 0 TeXcolorrgb
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SDict begin H.R end
- 910 694 a 910 747
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a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.mazires00sfs) cvn H.B /ANN pdfmark end
- 910 747 a Black FA(].)j(ECRS)e(fo)r(cuses)h(on)g(encrypting)g(shared)
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-(that)h(they)g(are)f(routing.)g(In)h(SUNDR)h([)p 0 1 0
-TeXcolorrgb 3236 847 a
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+0 1 0 TeXcolorrgb 3236 2860 a
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SDict begin H.R end
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SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.mazieres02building) cvn H.B /ANN pdfmark end
- 3319
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-(if)523 1245 y(the)h(serv)n(er)e(passes)h(a)h(v)n(ersion)e(that)i(lac)n
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SDict begin H.S end
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1333
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(cite.clark99distributed) cvn H.B /ANN pdfmark end
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(same)f(sc)n(heme)g(to)g(encrypt)g(en)n(tire)g(\014les)h(\(not)f(just)
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SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.3.3) cvn H.B /DEST
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SDict begin H.S end
- 1338 2946 a 0 TeXcolorgray 0 TeXcolorgray
-1338 2946 a
+ 1338 1374
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SDict begin H.R end
- 1338 2946 a 1338 2946 a
+ 1338 1374
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SDict begin [ /View [/XYZ H.V] /Dest (figure.1.3) cvn H.B /DEST pdfmark
end
- 1338 2946 a Black
-100 x FA(Example)27 b(proto)r(col)f(for)h(an)h(ECRS)f(do)n(wnload.)p
-Black Black 523 3283 a
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SDict begin H.S end
- 523 3283 a 523 3283 a
+ 523
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SDict begin 12 H.A end
- 523 3283
-a 523 3283 a
+ 523 1669 a 523 1669 a
+SDict begin [ /View [/XYZ H.V] /Dest (section.1.4) cvn H.B /DEST pdfmark
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+ 523 1669 a 83
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+(addressed.)523 2679 y
+SDict begin H.S end
+ 523 2679 a 523 2679 a
+SDict begin 12 H.A end
+ 523 2679
+a 523 2679 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.4.1) cvn H.B /DEST
pdfmark end
- 523 3283 a 83 x Fr(4.1)95 b(Keyw)m(ord)32
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(the)g(con)n(ten)n(t)g(m)n(ust)f(often)h(b)r(e)g(asso)r(ciated)e(with)
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b(astly)25 b(b)r(etter)g(than)g(forcing)g(the)g(user)g(to)g(rely)f(on)h
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(ti\014er,)h(the)g(k)n(eys)f(m)n(ust)h(still)g(b)r(e)h(c)n(hosen)e(so)g
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(The)g(simplest)g(non-tec)n(hnical)e(solution)i(for)f(this)523
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(an)g(informal)g(standard)f(for)g(k)n(eyw)n(ords.)g(If)523
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(it)i(easy)e(for)h(others)f(to)h(guess)f(a)h(k)n(eyw)n(ord,)f(it)h(is)g
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(v)n(en)n(tions)f(for)h(k)n(eyw)n(ord)f(selection.)h(F)-7
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(ma)n(y)h(b)r(e)h(to)f(only)g(use)h(lo)n(w)n(er-case)d(letters.)648
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(h)h(is)h(that)h(users)f(ma)n(y)g(b)r(e)h(reluctan)n(t)523
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(k)n(eyw)n(ords)e(for)i(the)h(con)n(ten)n(t)f(that)h(they)g(pro)n
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+2575 3931 a
SDict begin H.S end
- 2575 4625 a 0 1 0 TeXcolorrgb FA(12)p 0 1 0
-TeXcolorrgb 2658 4572 a
+ 2575 3931 a 0 1 0 TeXcolorrgb FA(14)p 0 1 0
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SDict begin H.R end
- 2658 4572 a 2658 4625 a
+ 2658 3877 a 2658 3931 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.le2005) cvn H.B /ANN pdfmark end
2658
-4625 a Black FA(].)i Fs(libextractor)22 b FA(is)k(a)523
-4725 y(library)j(for)h(metadata)f(extraction)h(that)g(is)g(used)g(to)g
-(automatically)g(extract)f(k)n(eyw)n(ords)523 4825 y(and)f(other)g
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(metadata,)g(suc)n(h)g(as)g(descriptions,)g(commen)n(ts)g(and)g(mime-t)
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-TeXDict begin 14 13 bop 0 0 a
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+SDict begin 12 H.A end
+ 523 4370
+a 523 4370 a
+SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.4.2) cvn H.B /DEST
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+ 523 4370 a 99 x Fq(4.2)95 b(Directories)523
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SDict begin /product where{pop product(Distiller)search{pop pop pop
version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto
closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show
@@ -7401,119 +7588,116 @@
232 a
SDict begin H.R end
523 232 a 523 232 a
-SDict begin [ /View [/XYZ H.V] /Dest (page.14) cvn H.B /DEST pdfmark
+SDict begin [ /View [/XYZ H.V] /Dest (page.15) cvn H.B /DEST pdfmark
end
- 523 232 a Black Fx(14)199 b(C.)27
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-Black 523 365 a
-SDict begin H.S end
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-SDict begin 12 H.A end
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-a
-SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.4.2) cvn H.B /DEST
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- 523 365 a 83 x Fr(4.2)95 b(Directories)523 584 y FA(Another)25
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-(eled)h(data.)h(If)g(sev)n(eral)d(\014les)j(of)g(suc)n(h)f(a)g
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+ 523 232 a Black 1036 w Fx(An)25
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(y)h(n)n(um)n(b)r(er)g(of)g Ft(SBlo)l(ck)p FA(s)h(or)f
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-648 1581 y(Note)k(that)h(it)h(is)e(p)r(ossible)h(for)f(users)g(to)h
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(assem)n(ble)e(a)i(directory)e(that)i(refers)f(to)h(an)n(y)523
-1680 y(com)n(bination)d(of)h(\014les:)g(\014les)g(the)g(user)f
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(inserted)h(p)r(ersonally)-7 b(,)28 b(\014les)i(that)g(the)h(user)e(do)
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(tered)h(as)f(searc)n(h)g(results)h(but)h(nev)n(er)e(do)n(wnloaded,)g
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(w)n(ould)g(b)r(e)g(in)n(terpreted)f(as)g(references)g(that)h(corresp)r
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(also)g(refer)f(to)i(other)f(directories,)f(allo)n(wing)g(users)523
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(systems)f(or)g(the)i(W)-7 b(orld)27 b(Wide)g(W)-7 b(eb.)28
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-(or)523 2278 y(directories)26 b(that)i(are)f(supp)r(osed)g(to)h(b)r(e)g
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SDict begin H.S end
- 523 2413 a
-523 2413 a
+ 523 1887 a
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SDict begin 12 H.A end
- 523 2413 a 523 2413 a
+ 523 1887 a 523 1887 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.4.3) cvn H.B /DEST
pdfmark end
- 523 2413 a 84 x Fr(4.3)95
+ 523 1887 a 83 x Fq(4.3)95
b(E\016cien)m(t)31 b(lo)s(okups)f(with)i(blo)s(om)e(\014lters)523
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-(since)h(a)f(p)r(eer)g(ma)n(y)g(only)h(b)r(e)g(able)f(to)h(resp)r(ond)
-523 2932 y(to)c(a)g(fraction)g(of)g(the)h(receiv)n(ed)e(queries.)h
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-(transmitted)g(o)n(v)n(er)e(a)i(slo)n(w)f(mo)r(dem)h(line.)h(Man)n(y)
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(on)h(the)g(other)g(hand,)g(can)g(migrate)f(quic)n(kly)g(from)523
-3031 y(host)20 b(to)h(host.)f(Storing)g(a)g(large)f(\014le)i(on)f(a)g
+2646 y(host)20 b(to)h(host.)f(Storing)g(a)g(large)f(\014le)i(on)f(a)g
(single)g(host)g(also)g(fails)g(to)g(facilitate)h(distribution)523
-3130 y(of)28 b(load)e(for)i(do)n(wnloading)e(purp)r(oses.)523
-3288 y
+2746 y(of)28 b(load)e(for)i(do)n(wnloading)e(purp)r(oses.)523
+2937 y
SDict begin H.S end
- 523 3288 a 523 3288 a
+ 523 2937 a 523 2937 a
SDict begin 12 H.A end
- 523 3288 a 523 3288 a
+ 523 2937 a 523 2937 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.5.1) cvn H.B /DEST
pdfmark end
523
-3288 a 83 x Fr(5.1)95 b(A)m(ttac)m(ks)523 3530 y FA(ECRS)34
+2937 a 90 x Fq(5.1)95 b(A)m(ttac)m(ks)523 3224 y FA(ECRS)34
b(is)f(op)r(en)h(to)g(t)n(w)n(o)f(t)n(yp)r(es)h(of)f(attac)n(ks)g(from)
h(censors.)e(The)i(most)f(ob)n(vious)g(attac)n(k)523
-3629 y(is)40 b(to)g(guess)f(k)n(eyw)n(ords)f(and)i(use)g(those)f(to)h
+3324 y(is)40 b(to)g(guess)f(k)n(eyw)n(ords)f(and)i(use)g(those)f(to)h
(compute)g(queries)f(for)h(sp)r(eci\014c)g Ft(KBlo)l(ck)p
-FA(s.)523 3729 y(The)28 b(adv)n(ersary)c(can)j(then)h(try)f(to)h
+FA(s.)523 3424 y(The)28 b(adv)n(ersary)c(can)j(then)h(try)f(to)h
(censor)e(these)h(queries.)g(Since)h(the)f(same)g(con)n(ten)n(t)g(can)
-523 3828 y(b)r(e)36 b(a)n(v)-5 b(ailable)33 b(under)i(man)n(y)g(k)n
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(eyw)n(ords,)e(this)j(tec)n(hnique)f(is)g(not)g(necessary)e
-(successful.)523 3928 y(Ho)n(w)n(ev)n(er,)25 b(this)i(guessing)f(attac)
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n(k)f(do)r(es)i(pro)n(vide)f(the)h(opp)r(ortunit)n(y)f(for)g(limited)i
-(forms)e(of)523 4028 y(censorship.)g(An)h(adv)n(ersary)c(could)k
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(create)e(a)i(\\blac)n(klist")e(of)h(k)n(eyw)n(ords)e(and)j(attempt)g
-(to)523 4127 y(legally)g(force)g(op)r(erators)e(to)j(\014lter)f(matc)n
-(hing)g(queries)g(or)g(replies.)648 4227 y(Instead)e(of)h(predicting)g
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(k)n(eyw)n(ords,)e(the)i(attac)n(k)n(er)e(can)i(also)f(try)h(to)f
-(obtain)h(the)h(exact)523 4327 y(con)n(ten)n(ts)37 b(of)h(the)g(\014le)
+(obtain)h(the)h(exact)523 4028 y(con)n(ten)n(ts)37 b(of)h(the)g(\014le)
g(\(or)f(at)h(least)g(the)g(exact)f(con)n(ten)n(ts)g(of)h(an)g
-(incriminating)f(part\).)523 4426 y(This)d(ma)n(yb)r(e)f(ac)n(hiev)n
+(incriminating)f(part\).)523 4127 y(This)d(ma)n(yb)r(e)f(ac)n(hiev)n
(ed)g(b)n(y)g(searc)n(hing)f(the)i(net)n(w)n(ork)f(for)g(certain)g(k)n
-(eyw)n(ords)f(and)h(then)523 4526 y(do)n(wnloading)i(the)i(resulting)g
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(con)n(ten)n(t.)f(This)h(w)n(a)n(y)f(the)h(attac)n(k)n(er)e(can)h
-(again)g(compute)523 4625 y(the)e(query)e(for)h(the)h
+(again)g(compute)523 4327 y(the)e(query)e(for)h(the)h
Ft(DBlo)l(ck)p FA(s)g(and)f Ft(IBlo)l(ck)p FA(s)h(and)f(also)g(obtain)g
-(the)g(encrypted)g Ft(DBlo)l(ck)p FA(s)523 4725 y(and)d
+(the)g(encrypted)g Ft(DBlo)l(ck)p FA(s)523 4426 y(and)d
Ft(IBlo)l(ck)p FA(s)h(themselv)n(es.)f(Again,)f(the)i(adv)n(ersary)c
-(can)j(then)g(try)g(to)g(censor)f(this)h(data.)523 4825
+(can)j(then)g(try)g(to)g(censor)f(this)h(data.)523 4526
y(Note)25 b(that)g(this)h(attac)n(k)e(requires)g(the)h(adv)n(ersary)d
(to)j(obtain)g(a)g(cop)n(y)f(of)h(the)h(con)n(ten)n(t)e(and)523
-4924 y(then)g(exercise)f(a)g(certain)g(amoun)n(t)g(of)h(con)n(trol)e(o)
-n(v)n(er)g(the)i(p)r(eers)f(in)h(the)g(net)n(w)n(ork.)e(As)i(users)p
-Black Black eop end
-%%Page: 16 16
-TeXDict begin 16 15 bop 0 0 a
+4625 y(then)g(exercise)f(a)g(certain)g(amoun)n(t)g(of)h(con)n(trol)e(o)
+n(v)n(er)g(the)i(p)r(eers)f(in)h(the)g(net)n(w)n(ork.)e(As)i(users)523
+4725 y(m)n(ust)e(ha)n(v)n(e)f(a)h(w)n(a)n(y)f(to)h(decrypt)g(the)g
+(\014le)g(solely)g(b)n(y)f(means)h(of)g(guessing)f(the)h(k)n(eyw)n
+(ord,)f(this)523 4825 y(attac)n(k)j(cannot)g(b)r(e)i(a)n(v)n(oided.)d
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+(ma)n(y)i(b)r(e)523 4924 y(able)i(to)h(route)f(the)h(con)n(ten)n(t)f
+(around)g(the)h(censoring)e(p)r(eers.)p Black Black eop
+end
+%%Page: 17 17
+TeXDict begin 17 16 bop 0 0 a
SDict begin /product where{pop product(Distiller)search{pop pop pop
version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto
closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show
@@ -7672,153 +7848,155 @@
232 a
SDict begin H.R end
523 232 a 523 232 a
-SDict begin [ /View [/XYZ H.V] /Dest (page.16) cvn H.B /DEST pdfmark
+SDict begin [ /View [/XYZ H.V] /Dest (page.17) cvn H.B /DEST pdfmark
end
- 523 232 a Black Fx(16)199 b(C.)27
-b(Grotho\013,)f(K.)g(Grotho\013,)g(T.)h(Horozo)n(v,)f(J.T.)h(Lindgren)p
-Black 523 448 a FA(m)n(ust)22 b(ha)n(v)n(e)f(a)h(w)n(a)n(y)f(to)h
-(decrypt)g(the)g(\014le)g(solely)g(b)n(y)f(means)h(of)g(guessing)f(the)
-h(k)n(eyw)n(ord,)f(this)523 548 y(attac)n(k)j(cannot)g(b)r(e)i(a)n(v)n
-(oided.)d(A)i(fault-toleran)n(t)f(p)r(eer-to-p)r(eer)g(routing)g(proto)
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-(t)f(around)g(the)h(censoring)e(p)r(eers.)648 748 y(If)39
-b(suc)n(h)f(an)g(activ)n(e)g(censorship)f(attac)n(k)h(is)g(kno)n(wn)g
-(to)g(o)r(ccur)g(on)g(a)h(large)e(scale,)g(a)523 848
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-(con)n(ten)n(t)e(with)i(sligh)n(t)f(alterations)f(for)h(eac)n(h)523
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-r(eginning)f(of)g(a)g(text-do)r(cumen)n(t)h(is)f(su\016cien)n(t)523
-1047 y(to)34 b(c)n(hange)g Ft(al)t(l)h FA(blo)r(c)n(ks)f(of)g(the)h
-(ECRS)f(enco)r(ding.)p 1 0 0 TeXcolorrgb 2148 1047 a
+ 523 232 a Black 1036 w Fx(An)25
+b(Enco)r(ding)h(for)h(Censorship-Resistan)n(t)f(Sharing)199
+b(17)p Black 648 448 a FA(If)39 b(suc)n(h)f(an)g(activ)n(e)g
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+(alterations)f(for)h(eac)n(h)523 648 y(k)n(eyw)n(ord.)20
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+(ding.)p 1 0 0 TeXcolorrgb 2148 747 a
SDict begin H.S end
-
-2148 1047 a -30 x Fz(3)2185 1047 y
+ 2148 747 a -30
+x Fz(3)2185 747 y
SDict begin 12 H.L end
- 2185 1047 a 2185 1047
-a
+ 2185 747 a 2185 747 a
SDict begin [ /Subtype /Link /Dest (Hfootnote.3) cvn /H /I /Border
[0 0 0] /Color [1 0 0] H.B /ANN pdfmark end
- 2185 1047 a Black 34 w FA(While)h(this)g(w)n(ould)f(defeat)g(the)h
-(use)523 1147 y(of)26 b(con)n(v)n(ergen)n(t)e(encryption)i(and)g
-(increase)f(the)h(storage)e(and)i(bandwidth)h(requiremen)n(ts,)523
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-(censor)e(to)i(e\013ectiv)n(ely)f(censor)f(all)h(of)g(the)h(v)-5
-b(arian)n(ts.)523 1346 y(Since)35 b(suc)n(h)f(a)g(p)r(o)n(w)n(erful)f
+ 2185 747 a Black
+34 w FA(While)h(this)g(w)n(ould)f(defeat)g(the)h(use)523
+847 y(of)26 b(con)n(v)n(ergen)n(t)e(encryption)i(and)g(increase)f(the)h
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+(to)i(e\013ectiv)n(ely)f(censor)f(all)h(of)g(the)h(v)-5
+b(arian)n(ts.)523 1046 y(Since)35 b(suc)n(h)f(a)g(p)r(o)n(w)n(erful)f
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-(the)g Ft(default)i FA(in)523 1445 y(ECRS)27 b(is)h(to)f(use)h(con)n(v)
-n(ergen)n(t)d(encryption.)648 1546 y(Both)33 b(attac)n(ks)f(fail)i(to)f
+(the)g Ft(default)i FA(in)523 1146 y(ECRS)27 b(is)h(to)f(use)h(con)n(v)
+n(ergen)n(t)d(encryption.)648 1252 y(Both)33 b(attac)n(ks)f(fail)i(to)f
(enable)h(in)n(termediaries)e(to)h(exercise)g(editorial)g(con)n(trol)f
-(o)n(v)n(er)523 1645 y(con)n(ten)n(t)25 b(in)g(general.)f(While)i(p)r
+(o)n(v)n(er)523 1352 y(con)n(ten)n(t)25 b(in)g(general.)f(While)i(p)r
(eers)f(can)g(theoretically)f(b)r(e)i(forced)e(to)h(censor)f(w)n
-(ell-kno)n(wn)523 1745 y(k)n(eyw)n(ords)d(and)h(\014les,)h(they)g(are)f
+(ell-kno)n(wn)523 1451 y(k)n(eyw)n(ords)d(and)h(\014les,)h(they)g(are)f
(unable)h(to)g(censor)e(new)i(k)n(eyw)n(ords)e(or)h(unkno)n(wn)g(con)n
-(ten)n(t.)523 1845 y(As)38 b(small)g(c)n(hanges)f(to)h(the)h(con)n(ten)
+(ten)n(t.)523 1551 y(As)38 b(small)g(c)n(hanges)f(to)h(the)h(con)n(ten)
n(t)f(or)f(k)n(eyw)n(ord)g(are)g(su\016cien)n(t)h(to)g(mak)n(e)g
-(detection)523 1944 y(imp)r(ossible,)28 b(these)f(t)n(yp)r(es)h(of)f
-(censorship)g(should)g(b)r(e)h(impractical.)648 2045
+(detection)523 1651 y(imp)r(ossible,)28 b(these)f(t)n(yp)r(es)h(of)f
+(censorship)g(should)g(b)r(e)h(impractical.)648 1757
y(Another)j(serious)f(t)n(yp)r(e)i(of)g(attac)n(k)f(is)g(spamming)g
-(the)h(global)f(k)n(eyw)n(ord)f(space)g(with)523 2144
+(the)h(global)f(k)n(eyw)n(ord)f(space)g(with)523 1857
y(useless)i(con)n(ten)n(t.)g(P)n(opular)f(k)n(eyw)n(ords)g(are)g(an)i
(easy)e(target)h(since)h(they)f(are)g(b)n(y)g(nature)523
-2244 y(easily)k(guessed.)h(Namespaces)f(can)g(theoretically)h
-(eliminate)g(this)g(problem,)g(ho)n(w)n(ev)n(er)523 2344
+1956 y(easily)k(guessed.)h(Namespaces)f(can)g(theoretically)h
+(eliminate)g(this)g(problem,)g(ho)n(w)n(ev)n(er)523 2056
y(they)28 b(create)e(a)h(new)g(di\016cult)n(y)h(in)f(assessing)f(whic)n
(h)h(pseudon)n(yms)f(represen)n(t)g(users)h(that)523
-2443 y(pro)n(vide)20 b(v)-5 b(aluable)20 b(con)n(ten)n(t.)h(A)g(secure)
+2156 y(pro)n(vide)20 b(v)-5 b(aluable)20 b(con)n(ten)n(t.)h(A)g(secure)
f(reputation)g(system,)h(lik)n(e)f(Adv)n(ogato)f([)p
-0 1 0 TeXcolorrgb 2996 2443 a
+0 1 0 TeXcolorrgb 2996 2156 a
SDict begin H.S end
- 2996 2443 a 0 1 0 TeXcolorrgb
-FA(15)p 0 1 0 TeXcolorrgb 3079 2390 a
+ 2996 2156 a 0 1 0 TeXcolorrgb
+FA(17)p 0 1 0 TeXcolorrgb 3079 2102 a
SDict begin H.R end
- 3079 2390 a 3079
-2443 a
+ 3079 2102 a 3079
+2156 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.levien03advogato) cvn H.B /ANN pdfmark end
- 3079 2443 a Black FA(],)i(ma)n(y)g(b)r(e)523 2543
+ 3079 2156 a Black FA(],)i(ma)n(y)g(b)r(e)523 2255
y(a)k(step)h(to)n(w)n(ards)e(a)i(tec)n(hnical)f(solution)h(for)f(this)h
(problem.)g(A)g(p)r(ossibly)f(more)g(imp)r(ortan)n(t)523
-2643 y(c)n(hallenge)i(for)h(future)h(w)n(ork)e(is)h(making)g(suc)n(h)g
+2355 y(c)n(hallenge)i(for)h(future)h(w)n(ork)e(is)h(making)g(suc)n(h)g
(complex)g(solutions)g(easily)f(accessible)h(for)523
-2742 y(the)g(a)n(v)n(erage)d(user.)523 2911 y
+2455 y(the)g(a)n(v)n(erage)d(user.)523 2648 y
SDict begin H.S end
- 523 2911
-a 523 2911 a
+ 523 2648
+a 523 2648 a
SDict begin 12 H.A end
- 523 2911 a 523 2911 a
+ 523 2648 a 523 2648 a
SDict begin [ /View [/XYZ H.V] /Dest (subsection.1.5.2) cvn H.B /DEST
pdfmark end
- 523 2911 a 84 x Fr(5.2)95
-b Fi(KBlo)-5 b(cks)32 b Fr(or)g(triple-hash)523 3166
+ 523 2648 a 90 x Fq(5.2)95
+b Fi(KBlo)-5 b(cks)32 b Fq(or)g(triple-hash)523 2939
y FA(The)c(triple-hash)f(that)h(w)n(as)f(used)g(instead)h(of)g
Ft(KBlo)l(ck)p FA(s)g(in)g(our)f(earlier)g(w)n(ork)54
-b([)p 0 1 0 TeXcolorrgb 3093 3166 a
+b([)p 0 1 0 TeXcolorrgb 3093 2939 a
SDict begin H.S end
- 3093 3166 a 0 1 0
-TeXcolorrgb FA(2)p 0 1 0 TeXcolorrgb 3134 3112 a
+ 3093 2939 a 0 1 0
+TeXcolorrgb FA(2)p 0 1 0 TeXcolorrgb 3134 2885 a
SDict begin H.R end
3134
-3112 a 3134 3166 a
+2885 a 3134 2939 a
SDict begin [ /Color [0 1 0] /H /I /Border [0 0 0] /Subtype /Link /Dest
(cite.esed) cvn H.B /ANN pdfmark end
- 3134 3166 a Black FA(])28 b(allo)n(ws)523
-3265 y(for)35 b(an)h(attac)n(k)f(b)n(y)g(an)h(activ)n(e,)f
+ 3134 2939 a Black FA(])28 b(allo)n(ws)523
+3038 y(for)35 b(an)h(attac)n(k)f(b)n(y)g(an)h(activ)n(e,)f
(participating)g(adv)n(ersary)-7 b(.)33 b(The)j(follo)n(wing)f
-(paragraphs)523 3365 y(\014rst)28 b(brie\015y)f(presen)n(t)g(the)h
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(original)e(sc)n(heme,)i(discuss)f(the)h(attac)n(k)f(and)h(then)g
-(compare)f(it)523 3464 y(with)h(the)g Ft(KBlo)l(ck)h
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FA(approac)n(h)d(tak)n(en)h(in)g(this)h(pap)r(er.)648
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+3344 y(Let)35 b(an)g Ft(RBlo)l(ck)h FA(b)r(e)g(a)e(new)i(kind)f(of)g
(blo)r(c)n(k)g(that)g(also)g(con)n(tains)f(the)h(metadata)g(of)523
-3664 y(a)c(\014le)g(\(including)h(the)g(top)f(CHK)g(data\).)g(The)g
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(only)g(di\013erence)g(b)r(et)n(w)n(een)g Ft(RBlo)l(ck)p
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Ft(RBlo)l(ck)p FA(s)f(are)f(encrypted)h(and)g(requested)g(using)g(the)g
-(follo)n(wing)f(triple-)523 3864 y(hash)35 b(sc)n(heme.)f(F)-7
-b(or)35 b(eac)n(h)f(k)n(eyw)n(ord)g Fq(k)s FA(,)h(the)g
-Ft(RBlo)l(ck)h Fq(R)g FA(is)f(encrypted)g(with)h Fq(H)7
-b FA(\()p Fq(k)s FA(\))35 b(and)523 3963 y(stored)f(as)f(the)i(pair)f
-Fb(f)p Fq(H)7 b FA(\()p Fq(H)g FA(\()p Fq(k)s FA(\)\))p
-Fq(;)14 b(E)1682 3978 y Fh(H)t Fz(\()p Fh(k)q Fz(\))1834
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(signi\014can)n(tly)f(larger)f(than)h(the)h(plain)n(text.)g(Indi-)523
-4101 y(vidual)26 b(blo)r(c)n(ks)e(of)i(the)g(ciphertext)g(can)f(b)r(e)h
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(generated)f(from)g(plain)n(text)h(without)g(reading)523
-4201 y(unrelated)38 b(parts)h(of)f(the)h(original.)f(While)h
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(dictionary)f(attac)n(ks)g(on)g(the)h(k)n(eyw)n(ords)e(or)523
-4301 y(kno)n(wn)24 b(plain)n(text)g(attac)n(ks)g(on)g(the)h(con)n(ten)n
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(t)f(are)g(still)h(p)r(ossible,)f(they)h(are)e(harmless)g(with)523
-4400 y(resp)r(ect)k(to)h(the)g(goal)e(of)i(deniabilit)n(y)g(for)f(in)n
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(termediaries.)f(The)i(basic)f(enco)r(ding)g(sc)n(heme)523
-4500 y(can)21 b(b)r(e)h(extended)g(with)g(directories)e(and)i
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(namespaces.)e(Namespaces)g(allo)n(w)h(for)g(\014les)g(and)523
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-(signing)523 4699 y(con)n(ten)n(t)e(it)h(is)g(p)r(ossible)f(to)g(v)n
+4400 y(directories)28 b(to)i(b)r(e)g(up)r(dated.)g(Using)g
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(erify)g(searc)n(h)f(results)h(in)h(a)f(global)g(k)n(eyw)n(ord)f
(space.)p Black Black eop end
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232 a
SDict begin H.R end
523 232 a 523 232 a
-SDict begin [ /View [/XYZ H.V] /Dest (page.18) cvn H.B /DEST pdfmark
+SDict begin [ /View [/XYZ H.V] /Dest (page.19) cvn H.B /DEST pdfmark
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- 523 232 a Black Fx(18)199 b(C.)27
-b(Grotho\013,)f(K.)g(Grotho\013,)g(T.)h(Horozo)n(v,)f(J.T.)h(Lindgren)p
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-(orks)f(to)n(w)n(ards)g(implemen)n(ting)i(anon)n(ymous,)523
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Fa(gnu)p FA(net)i(is)g(free)f(soft)n(w)n(are)f(and)i(part)f(of)g(the)h
(GNU)523 747 y(pro)5 b(ject.)25 b(The)g Fa(gnu)p FA(net)h(co)r(de)f(is)
h(appro)n(ximately)d(100,000)g(lines)i(of)h(C)f(co)r(de.)g(ECRS)h
@@ -7965,206 +8137,193 @@
867 946 a 867 946 a
SDict begin [ /Subtype /Link /Dest (Hfootnote.4) cvn /H /I /Border
[0 0 0] /Color [1 0 0] H.B /ANN pdfmark end
- 867 946 a Black FA(.)523 1186
-y Fr(Ac)m(kno)m(wledgemen)m(ts)523 1259 y
+ 867 946 a Black FA(.)523 1213
+y Fq(Ac)m(kno)m(wledgemen)m(ts)523 1309 y
SDict begin H.S end
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-523 1259 a
+ 523 1309 a
+523 1309 a
SDict begin 12 H.A end
- 523 1259 a 523 1259 a
+ 523 1309 a 523 1309 a
SDict begin [ /View [/XYZ H.V] /Dest (section*.1) cvn H.B /DEST pdfmark
end
- 523 1259 a 84 x FA(The)k(authors)f
+ 523 1309 a 87 x FA(The)k(authors)f
(thank)h(Roger)f(Dingledine)h(for)g(helpful)g(commen)n(ts)g(on)g(an)g
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-1698 y Fu(References)523 1788 y
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+1779 y Fu(References)523 1892 y
SDict begin H.S end
- 523 1788 a 523 1788 a
+ 523 1892 a 523 1892 a
SDict begin 11 H.A end
-523 1788 a 523 1788 a
+523 1892 a 523 1892 a
SDict begin [ /View [/XYZ H.V] /Dest (section*.2) cvn H.B /DEST pdfmark
end
- 523 1788 a 523 1788 a
+ 523 1892 a 523 1892 a
SDict begin H.S end
- 523 1788
-a 523 1788 a
+ 523 1892
+a 523 1892 a
SDict begin 11 H.A end
- 523 1788 a 523 1788 a
+ 523 1892 a 523 1892 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.anderson96eternity) cvn
H.B /DEST pdfmark end
- 523 1788 a Black 561
-1877 a Fx(1.)p Black 43 w(Ross)e(Anderson.)34 b(The)26
+ 523 1892 a Black 561
+1987 a Fx(1.)p Black 43 w(Ross)e(Anderson.)34 b(The)26
b(Eternit)n(y)f(Service.)34 b(In)25 b Fp(Pr)l(o)l(c)l(e)l(e)l(dings)30
-b(of)d(Pr)l(ago)l(crypt)j(1996)p Fx(,)d(1996.)523 1892
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y
SDict begin H.S end
- 523 1892 a 523 1892 a
+ 523 2002 a 523 2002 a
SDict begin 11 H.A end
- 523 1892 a 523 1892 a
+ 523 2002 a 523 2002 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.esed) cvn H.B /DEST pdfmark
end
- 523 1892
-a Black 561 1966 a Fx(2.)p Black 43 w(Krista)34 b(Bennett,)g(Christian)
+ 523 2002
+a Black 561 2081 a Fx(2.)p Black 43 w(Krista)34 b(Bennett,)g(Christian)
h(Grotho\013,)g(Tzv)n(etan)f(Horozo)n(v,)g(and)g(Ioana)h(P)n(atrascu.)
-60 b(Ef-)663 2058 y(\014cien)n(t)31 b(Sharing)h(of)h(Encrypted)e(Data.)
+60 b(Ef-)663 2173 y(\014cien)n(t)31 b(Sharing)h(of)h(Encrypted)e(Data.)
54 b(In)31 b Fp(ASCIP)p Fx(,)h(v)n(olume)g(2384)h(of)g
-Fp(L)l(e)l(ctur)l(e)j(Notes)e(in)663 2149 y(Computer)28
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b(Scienc)l(e)p Fx(,)f(pages)g(107{120.)i(Springer-V)-6
-b(erlag)25 b(Inc.,)h(2002.)523 2164 y
+b(erlag)25 b(Inc.,)h(2002.)523 2279 y
SDict begin H.S end
- 523 2164 a 523
-2164 a
+ 523 2279 a 523
+2279 a
SDict begin 11 H.A end
- 523 2164 a 523 2164 a
+ 523 2279 a 523 2279 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.bloom) cvn H.B /DEST pdfmark
end
- 523 2164 a Black 561 2238
+ 523 2279 a Black 561 2359
a Fx(3.)p Black 43 w(Burton)g(Blo)r(om.)37 b(Space/time)26
b(trade-o\013s)g(in)g(hash)g(co)r(ding)h(with)f(allo)n(w)n(able)i
-(errors.)37 b Fp(Com-)663 2329 y(munic)l(ations)28 b(of)f(the)i(A)n(CM)
-p Fx(,)c(13\(7\):422{426,)30 b(1970.)523 2348 y
+(errors.)37 b Fp(Com-)663 2450 y(munic)l(ations)28 b(of)f(the)i(A)n(CM)
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SDict begin H.S end
- 523 2348
-a 523 2348 a
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SDict begin 11 H.A end
- 523 2348 a 523 2348 a
+ 523 2469 a 523 2469 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.chen99prototype) cvn H.B
/DEST pdfmark end
- 523 2348 a Black 561
-2418 a Fx(4.)p Black 43 w(Y)-6 b(uan)19 b(Chen,)i(Jan)h(Edler,)f
+ 523 2469 a Black 561
+2545 a Fx(4.)p Black 43 w(Y)-6 b(uan)19 b(Chen,)i(Jan)h(Edler,)f
(Andrew)g(Goldb)r(erg,)h(Allan)f(Gottlieb,)h(Sumeet)e(Sobti,)h(and)g(P)
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(tation)h(of)h(arc)n(hiv)l(al)f(in)n(termemory)-6 b(.)37
-b(In)26 b Fp(Pr)l(o)l(c)l(e)l(e)l(dings)31 b(of)663 2601
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y(the)d(F)-6 b(ourth)29 b(A)n(CM)e(International)i(Confer)l(enc)l(e)g
-(on)f(Digital)f(Libr)l(aries)p Fx(,)g(1999.)523 2616
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y
SDict begin H.S end
- 523 2616 a 523 2616 a
+ 523 2743 a 523 2743 a
SDict begin 11 H.A end
- 523 2616 a 523 2616 a
+ 523 2743 a 523 2743 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.clark99distributed) cvn
H.B /DEST pdfmark end
- 523 2616
-a Black 561 2690 a Fx(5.)p Black 43 w(Ian)h(Clark)n(e,)h(Osk)l(ar)g
+ 523 2743
+a Black 561 2822 a Fx(5.)p Black 43 w(Ian)h(Clark)n(e,)h(Osk)l(ar)g
(Sandb)r(erg,)f(Brandon)h(Wiley)-6 b(,)28 b(and)g(Theo)r(dorew)i(W.)f
-(Hong.)43 b(F)-6 b(reenet:)663 2781 y(A)35 b(distributed)f(anon)n
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(ymous)i(information)g(storage)h(and)e(retriev)l(al)h(system.)63
-b(In)35 b(Hannes)663 2872 y(F)-6 b(ederrath,)28 b(editor,)g
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Fp(Designing)i(privacy)h(enhancing)f(te)l(chnolo)l(gies:)h
-(International)g(Work-)663 2964 y(shop)38 b(on)f(Design)g(Issues)h(in)f
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(A)n(nonymity)g(and)h(Unobservability,)g(Berkeley,)g(CA,)e(USA,)663
-3055 y(July)25 b(25{26,)g(2000:)g(pr)l(o)l(c)l(e)l(e)l(dings)p
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Fx(,)h(v)n(olume)c(2009)j(of)e Fp(L)l(e)l(ctur)l(e)k(Notes)f(in)f
-(Computer)h(Scienc)l(e)p Fx(.)663 3146 y(Springer-V)-6
-b(erlag)25 b(Inc.,)h(2001.)523 3161 y
+(Computer)h(Scienc)l(e)p Fx(.)663 3279 y(Springer-V)-6
+b(erlag)25 b(Inc.,)h(2001.)523 3294 y
SDict begin H.S end
- 523 3161 a 523
-3161 a
+ 523 3294 a 523
+3294 a
SDict begin 11 H.A end
- 523 3161 a 523 3161 a
+ 523 3294 a 523 3294 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.cohen02replication) cvn
H.B /DEST pdfmark end
- 523 3161 a Black 561 3235
+ 523 3294 a Black 561 3374
a Fx(6.)p Black 43 w(Edith)31 b(Cohen)g(and)g(Scott)g(Shenk)n(er.)50
b(Replication)31 b(strategies)i(in)e(unstructured)f(p)r(eer-to-)663
-3327 y(p)r(eer)25 b(net)n(w)n(orks.)35 b(In)25 b Fp(The)j(A)n(CM)f
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(SIGCOMM'02)g(Confer)l(enc)l(e)p Fx(,)g(August)e(2002.)523
-3342 y
+3480 y
SDict begin H.S end
- 523 3342 a 523 3342 a
+ 523 3480 a 523 3480 a
SDict begin 11 H.A end
- 523 3342 a 523 3342 a
+ 523 3480 a 523 3480 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.cfs:sosp01) cvn H.B /DEST
pdfmark end
523
-3342 a Black 561 3416 a Fx(7.)p Black 43 w(F)-6 b(rank)26
+3480 a Black 561 3560 a Fx(7.)p Black 43 w(F)-6 b(rank)26
b(Dab)r(ek,)i(M.)g(F)-6 b(rans)27 b(Kaasho)r(ek,)h(Da)n(vid)f(Karger,)h
-(Rob)r(ert)g(Morris,)h(and)e(Ion)g(Stoica.)663 3507 y(Wide-area)j(co)r
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(op)r(erativ)n(e)h(storage)g(with)e(CFS.)47 b(In)28 b
Fp(Pr)l(o)l(c)l(e)l(e)l(dings)34 b(of)d(the)h(18th)g(A)n(CM)e(Sym-)663
-3598 y(p)l(osium)25 b(on)g(Op)l(er)l(ating)h(Systems)g(Principles)f
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(\(SOSP)g('01\))p Fx(,)f(Chateau)f(Lak)n(e)g(Louise,)g(Ban\013,)663
-3690 y(Canada,)k(Octob)r(er)e(2001.)523 3705 y
+3834 y(Canada,)k(Octob)r(er)e(2001.)523 3849 y
SDict begin H.S end
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-a 523 3705 a
+ 523 3849
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SDict begin 11 H.A end
- 523 3705 a 523 3705 a
+ 523 3849 a 523 3849 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.dingledine02mixminion) cvn
H.B /DEST pdfmark end
- 523 3705 a Black 561
-3779 a Fx(8.)p Black 43 w(George)32 b(Danezis,)g(Roger)g(Dingledine,)g
+ 523 3849 a Black 561
+3929 a Fx(8.)p Black 43 w(George)32 b(Danezis,)g(Roger)g(Dingledine,)g
(and)f(Nic)n(k)f(Mathewson.)52 b(Mixminion:)32 b(Design)g(of)663
-3870 y(a)d(T)n(yp)r(e)f(I)r(I)r(I)g(Anon)n(ymous)g(Remailer)i(Proto)r
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-3961 y(Privacy)p Fx(,)c(2003.)523 3976 y
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SDict begin H.S end
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-3976 a
+ 523 4126 a 523
+4126 a
SDict begin 11 H.A end
- 523 3976 a 523 3976 a
+ 523 4126 a 523 4126 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.freehaven-berk) cvn H.B
/DEST pdfmark end
- 523 3976 a Black 561 4050
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a Fx(9.)p Black 43 w(Roger)18 b(Dingledine,)h(Mic)n(hael)g(J.)g(F)-6
b(reedman,)18 b(and)g(Da)n(vid)f(Molnar.)23 b(The)c(free)f(ha)n(v)n(en)
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(service.)73 b(In)38 b(Hannes)g(F)-6 b(ederrath,)38 b(editor,)h
-Fp(Pr)l(o)l(c)l(e)l(e)l(d-)663 4233 y(ings)26 b(of)g(Designing)g
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(Privacy)h(Enhancing)g(T)-6 b(e)l(chnolo)l(gies:)27 b(Workshop)g(on)g
-(Design)f(Issues)h(in)663 4324 y(A)n(nonymity)h(and)g(Unobservability)p
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Fx(.)g(Springer-V)-6 b(erlag,)26 b(LNCS)f(2009,)i(July)f(2000.)523
-4339 y
+4495 y
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- 523 4339 a 523 4339 a
-SDict begin [ /View [/XYZ H.V] /Dest (cite.feamster-infranet) cvn H.B
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+ 523 4495 a 523 4495 a
+SDict begin [ /View [/XYZ H.V] /Dest (cite.farsite) cvn H.B /DEST pdfmark
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523
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SDict begin H.S end
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-4611 a
-SDict begin 11 H.A end
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-SDict begin [ /View [/XYZ H.V] /Dest (cite.ebe2003) cvn H.B /DEST pdfmark
-end
- 523 4611 a Black 74 x Fx(11.)p
-Black 43 w(Christian)h(Grotho\013.)35 b(An)25 b(Excess-Based)i
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606 4833 a
-SDict begin H.S end
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-SDict begin H.R end
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- 606 4833 a Black 0 1 0 0
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--17 x Fw(http://gnunet.org/)p 0 1 0 0 TeXcolorcmyk 1312
-4872 a
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232 a
SDict begin H.R end
523 232 a 523 232 a
-SDict begin [ /View [/XYZ H.V] /Dest (page.19) cvn H.B /DEST pdfmark
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-b(Enco)r(ding)h(for)h(Censorship-Resistan)n(t)f(Sharing)199
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SDict begin H.S end
523 365 a 523 365 a
SDict begin 11 H.A end
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-523 365 a
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+SDict begin [ /View [/XYZ H.V] /Dest (cite.secure2004goh) cvn H.B /DEST
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+Black 43 w(Eu-Jin)f(Goh.)35 b(Secure)25 b(indexes.)35
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+SDict begin H.S end
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+SDict begin 11 H.A end
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+SDict begin [ /View [/XYZ H.V] /Dest (cite.ebe2003) cvn H.B /DEST pdfmark
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+SDict begin H.S end
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+SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.le2005) cvn H.B /DEST pdfmark
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- 523 365 a Black 83 x Fx(12.)p Black 43 w(Christian)33
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+1117 y
SDict begin H.S end
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-523 555 a
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SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.hartman99swarm) cvn H.B
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- 523 555 a Black 76 x Fx(13.)p
-Black 43 w(John)d(H.)g(Hartman,)h(Ian)f(Murdo)r(c)n(k,)h(and)f(T)-6
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-722 y(system.)67 b(In)36 b Fp(International)j(Confer)l(enc)l(e)g(on)f
-(Distribute)l(d)h(Computing)f(Systems)p Fx(,)h(pages)663
-813 y(74{81,)28 b(1999.)523 828 y
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SDict begin H.S end
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SDict begin 11 H.A end
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-523 828 a 523 828 a
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+1396 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.herlihy87how) cvn H.B /DEST
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- 523 828 a Black 76 x Fx(14.)p Black
-43 w(Maurice)42 b(Herlih)n(y)e(and)h(J.)h(D.)f(T)n(ygar.)81
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SDict begin 11 H.A end
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+ 523 1584 a 523 1584 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.levien03advogato) cvn H.B
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523
-1011 a Black 76 x Fx(15.)p Black 43 w(Raph)76 b(Levien.)189
+1584 a Black 81 x Fx(17.)p Black 43 w(Raph)76 b(Levien.)189
b(A)n(ttac)n(k)77 b(resistan)n(t)h(trust)f(metrics.)190
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(ttp://www.levien.com/thesis/compact.p)r(df,)31 b(2003.)523
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SDict begin H.S end
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SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.maymounkov02kademlia) cvn
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523
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SDict begin H.S end
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SDict begin 11 H.A end
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-1452 a
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+2035 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.mazires00sfs) cvn H.B /DEST
pdfmark end
- 523 1452 a Black 91 x Fx(17.)p Black 43 w(Da)n(vid)25
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b(Mazi)n(\022)-36 b(eres.)36 b Fp(Self-c)l(ertifying)28
b(\014le)g(system)p Fx(.)35 b(PhD)26 b(thesis,)g(MIT,)h(2000.)523
-1558 y
+2146 y
SDict begin H.S end
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SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.mazieres02building) cvn
H.B /DEST pdfmark end
523
-1558 a Black 76 x Fx(18.)p Black 43 w(Da)n(vid)e(Mazi)n(\022)-36
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b(eres)28 b(and)e(Dennis)g(Shasha.)36 b(Building)27 b(secure)g(\014le)f
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b(In)35 b Fp(Pr)l(o)l(c)l(e)l(e)l(dings)k(of)d(the)i(Twenty-First)h(A)n
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y
SDict begin H.S end
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SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.mckusick84fast) cvn H.B
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SDict begin H.S end
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a
SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.merkle89tree) cvn H.B /DEST
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SDict begin H.S end
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SDict begin 11 H.A end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.muthitacharoen02ivy) cvn
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Black 43 w(A)n(thic)n(ha)21 b(Muthitac)n(haro)r(en,)i(Rob)r(ert)f
(Morris,)i(Thomer)f(M.)f(Gil,)i(and)d(Benjie)j(Chen.)k(Ivy:)21
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b(In)21 b Fp(Pr)l(o)l(c)l(e)l(e)l(dings)26 b(of)d(5th)i(Symp)l(osium)f
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SDict begin H.S end
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SDict begin 11 H.A end
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+SDict begin H.S end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.rabin89efficient) cvn H.B
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- 523 2562 a Black 76
-x Fx(22.)p Black 43 w(Mic)n(hael)k(O.)f(Rabin.)45 b(E\016cien)n(t)29
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b(disp)r(ersal)h(of)g(information)h(for)f(securit)n(y)-6
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b Fp(Journal)28 b(of)f(the)i(A)n(CM)p Fx(,)c(36\(2\):335{348,)30
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SDict begin H.S end
- 523 2748 a 523 2748 a
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SDict begin 11 H.A end
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-2748 a
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SDict begin [ /View [/XYZ H.V] /Dest (cite.rowstron01storage) cvn H.B
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- 523 2748 a Black 72 x Fx(23.)p Black 43 w(An)n(ton)n(y)k(I.)h
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(T.)i(Ro)n(wstron)f(and)f(P)n(eter)h(Drusc)n(hel.)64
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y(in)c(P)-6 b(AST,)30 b(a)i(large-scale,)h(p)r(ersisten)n(t)f(p)r
(eer-to-p)r(eer)e(storage)j(utilit)n(y)-6 b(.)50 b(In)30
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y
SDict begin H.S end
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SDict begin [ /View [/XYZ H.V] /Dest (cite.shamir) cvn H.B /DEST pdfmark
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- 523 3018
-a Black 76 x Fx(24.)p Black 43 w(A.)g(Shamir.)48 b(Ho)n(w)30
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b(to)g(share)g(a)h(secret.)47 b(In)30 b Fp(Communic)l(ations)i(of)f
-(the)h(A)n(CM)p Fx(,)e(v)n(olume)g(22,)663 3185 y(pages)c(612{613.)j(A)
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SDict begin H.S end
- 523 3200 a 523 3200 a
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SDict begin 11 H.A end
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-a 523 3200 a
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SDict begin [ /View [/XYZ H.V] /Dest (cite.stoica01chord) cvn H.B /DEST
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- 523 3200 a Black 76 x Fx(25.)p Black 43
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w(Ion)k(Stoica,)i(Rob)r(ert)e(Morris,)j(Da)n(vid)d(Karger,)i(M.)f(F)-6
-b(rans)31 b(Kaasho)r(ek,)h(and)e(Hari)h(Balakr-)663 3368
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y(ishnan.)g(Chord:)24 b(A)f(scalable)i(p)r(eer-to-p)r(eer)f(lo)r(okup)f
(service)h(for)h(in)n(ternet)e(applications.)33 b(In)663
-3459 y Fp(Pr)l(o)l(c)l(e)l(e)l(dings)26 b(of)d(the)i(2001)f(c)l(onfer)l
+4367 y Fp(Pr)l(o)l(c)l(e)l(e)l(dings)26 b(of)d(the)i(2001)f(c)l(onfer)l
(enc)l(e)i(on)d(applic)l(ations,)i(te)l(chnolo)l(gies,)g(ar)l(chite)l
-(ctur)l(es,)h(and)663 3550 y(pr)l(oto)l(c)l(ols)j(for)f(c)l(omputer)h
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(c)l(ommunic)l(ations)p Fx(,)e(pages)g(149{160.)h(A)n(CM)e(Press,)h
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SDict begin 11 H.A end
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-3565 a
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+4473 a
SDict begin [ /View [/XYZ H.V] /Dest (cite.stratton_oakmont) cvn H.B
/DEST pdfmark end
- 523 3565 a Black 77 x Fx(26.)p Black 43 w(Stratton)19
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b(Oakmon)n(t)g(vs)h(Pro)r(digy)g(Services)g(Compan)n(y,)g(1995)h(N.Y.)f
-(Misc.)h(Lexis)f(229,)h(\(N.Y.)663 3733 y(Sup.)k(Ct.)h(Nassau)g(Co.,)h
-(1995\).)523 3752 y
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-523 3752 a
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SDict begin [ /View [/XYZ H.V] /Dest (cite.syverson97anonymous) cvn
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- 523 3752 a Black 72 x Fx(27.)p Black 43 w(P)n(aul)35
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b(Syv)n(erson,)g(Da)n(vid)f(Goldsc)n(hlag,)j(and)e(Mic)n(hael)h(Reed.)
-62 b(Anon)n(ymous)34 b(Connections)663 3915 y(and)29
+62 b(Anon)n(ymous)34 b(Connections)663 4833 y(and)29
b(Onion)f(Routing.)45 b(In)29 b Fp(IEEE)h(Symp)l(osium)h(on)g(Se)l
-(curity)h(and)f(Privacy)p Fx(,)g(pages)f(44{54,)663 4007
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+(curity)h(and)f(Privacy)p Fx(,)g(pages)f(44{54,)663 4924
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-523 4022 a 523 4022 a
+ 523 232 a 0 TeXcolorgray 0 TeXcolorgray 523
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+SDict begin H.R end
+ 523 232 a 523 232 a
+SDict begin [ /View [/XYZ H.V] /Dest (page.21) cvn H.B /DEST pdfmark
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+ 523 232 a Black 1036 w Fx(An)25
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+b(21)p Black 523 365 a
+SDict begin H.S end
+ 523 365 a 523 365 a
SDict begin 11 H.A end
- 523 4022 a 523 4022 a
+ 523 365 a
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H.B /DEST pdfmark end
- 523 4022
-a Black 76 x Fx(28.)p Black 43 w(Marc)36 b(W)-6 b(aldman)34
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-4280 y(Communic)l(ations)g(Se)l(curity)p Fx(,)f(pages)g(126{135,)h
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+ 523 646 a 523
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SDict begin 11 H.A end
- 523 4295 a 523
-4295 a
+ 523 646 a 523 646 a
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end
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+(2000.)523 920 y
SDict begin H.S end
- 523 4569 a 523 4569 a
+ 523 920 a 523 920 a
SDict begin 11 H.A end
- 523 4569 a 523
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+ 523 920 a 523 920
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-(Emergen)n(t)g(Net)n(w)n(ork.)663 4737 y(In)e Fp(Pe)l(er-to-Pe)l(er)32
+ 523 920 a Black 76 x Fx(33.)p Black 43 w(Bryce)i(Wilco)n(x-O'Hearn.)
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%%Trailer
Modified: GNUnet-docs/papers/ecrs/main.tex
===================================================================
--- GNUnet-docs/papers/ecrs/main.tex 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/main.tex 2005-06-13 12:00:59 UTC (rev 904)
@@ -10,7 +10,7 @@
pdfpagemode=FullScreen,
pdftitle=An Encoding for Censorship-Resistant Sharing,
pdfauthor=Christian Grothoff and Krista Grothoff and Tzvetan Horozov and
Jussi T. Lindgren,
- pdfkeywords=encoding privacy censorship resistant sharing file peer
distributed system network,
+ pdfkeywords=encoding privacy censorship resistant sharing file peer
distributed system network private information retrieval,
pdfsubject=Privacy Enhancing Technologies,
colorlinks=true}
@@ -22,13 +22,13 @@
% scheme'' or ``encoding mechanism'' is better.
%
% Todo:
-% - Look into/cite MIT FARSITE system (convergent encryption)
% - fix xy-pic (dotted arrows, multicols)
%
% Notes by JTL (06.jun.05):
% - word 'convergent' is used in the end of the doc 'out of the blue'
% (we should use it earlier when the idea is introduced)
% [CG: yes, that's why I have the MIT FARSITE system in Todo above ]
+% [DONE]
% - while I tried to simulate a 'first time reader' the big picture
% of ECRS appeared a little muddled. A diagram of the relation of
% the encoding and the extensions might be helpful. Now we have
@@ -134,21 +134,47 @@
censorship. Specific details on how peers communicate and route data
are therefore outside of the scope of this paper.
+The definition of censorship resistance used in this work is similar
+to the formal definition given by~\cite{perng2005csr}. There,
+censorship resistance is defined as the inability of a censor to
+restrict a targeted document while allowing at least one other
+document to be retrieved. In~\cite{perng2005csr}, the adversary is
+granted extensive capabilities. In particular, the adversary is
+allowed to inspect every request or response, transcript the
+processing steps of all the peers and then decide whether to filter
+(drop) a given response. Availability of the service and anonymity of
+the participants are specifically decoupled from censorship
+resistance. For ECRS, an almost identical adversary model is selected
+-- while anonymity and availability are additional, possibly important
+goals, ECRS is supposed to be an orthogonal mechanism. The primary
+difference in the adversary model for ECRS is that the attacker is not
+allowed to be able to guess the exact content that is to be censored.
+This is an important restriction in practice since
+otherwise~\cite{perng2005csr} shows that censorship resistance
+requires a form of private information retrieval for which each
+operation has complexity $O(n)$ where $n$ is the size of the
+datastore. In return for restricting the guessing capabilities of the
+adversary, ECRS can achieve $O(1)$ complexity for its operations.
+Considering that availability is also an important goal, we believe
+that this is good trade-off.
+
As an encoding scheme, ECRS has to address two important issues.
First of all, users must be able to find content, preferably by
searching with simple, natural language keywords. Metadata related to
the contents of the file should be made available as part of the
-search result and prior to the download of the actual file. Secondly,
-the encoding scheme should support swarming, that is the download of a
-file from multiple peers. Since it is possible that identical data is
-inserted by many independent parties the encoding scheme should always
-result in identical encodings for identical source files. This
-special form of encryption was probably first described
-in~\cite{freenet} and later termed {\em convergent
+search result and prior to the download of the actual file. Metadata
+can include anything from user-provided content descriptions to
+thumbnails (for images) and automatically detected mime-types.
+Secondly, the encoding scheme should support swarming, that is the
+download of a file from multiple peers. Since it is possible that
+identical data is inserted by many independent parties the encoding
+scheme should always result in identical encodings for identical
+source files. This special form of encryption was probably first
+described in~\cite{clark99distributed} and later termed {\em convergent
encryption}~\cite{farsite}. With convergent encryption, the existence
-of multiple copies of the same content can be detected; this
-knowledge can then be used to increase fault-tolerance, performance
-and availability.
+of multiple copies of the same content can be detected; this knowledge
+can then be used to increase fault-tolerance, performance and
+availability.
% why is this hard? open network == adversaries playground
Unfortunately, it is not enough to just meet requirements related to
@@ -157,18 +183,16 @@
form of access control. This opens the network to malicious
participants. Thus, the encoding scheme should guarantee the {\em
integrity} of the content even in the presence of malicious
-participants.
-
-The encoding mechanism must ensure that invalid replies are detected
-and that peers can distinguish valuable content from maliciously
-generated noise. This is particularly important in three cases.
-First, if large files are assembled using blocks from multiple peers,
-some of these peers may be malicious and try to corrupt the file.
-These corruptions should be detected on a small granularity and
+participants. The encoding mechanism must ensure that invalid replies
+are detected and that peers can distinguish valuable content from
+maliciously generated noise. This is particularly important in three
+cases. First, if large files are assembled using blocks from multiple
+peers, some of these peers may be malicious and try to corrupt the
+file. These corruptions should be detected on a small granularity and
repaired with correct data from other peers. Second, for searches it
should be difficult for peers to spam the result set. Otherwise the
-users may drown in useless information. Finally, intermediaries and
-that are merely routing the content should be able to detect invalid
+users may drown in useless information. Finally, intermediaries that
+are merely routing the content should be able to detect invalid
replies. This enables local economies (like in~\cite{ebe2003}) and
prevents the retransmission and replication of corrupted data by
non-malicious peers.
@@ -593,7 +617,16 @@
obtain the query and the key that are now necessary in order to
retrieve the encoded content. While out-of-band communication of
those CHK keys is certainly feasible, an integrated solution is
-clearly desirable.
+clearly desirable. Related work on secure
+indexing~\cite{secure2004goh} allows servers to retrieve documents by
+keyword without learning about the rest of the document. The scheme
+that will be described in Section~\ref{kblocks} improves on this by
+keeping the keyword itself private, allowing intermediaries to verify
+the correct operation of the server and avoiding the need for the
+publisher to encrypt the document with the public key of a {\em
+specific} receiver, thereby theoretically permitting access to the
+same encrypted content to arbitrary participants (as long as they
+are able to obtain or guess the necessary keyword).
The key problem for the search is that simply publishing CHK keys in
plaintext under certain keywords (as done in Freenet with KSK keys)
@@ -610,14 +643,21 @@
schemes impractical.
But how can a system prevent peers from returning invalid responses to
-a search? Since the nature of a search is that the initiator does not
-know precisely what content is desired, it is impossible for the query
-to completely determine the reply. For this reason schemes like CHK
-cannot be applied to the search problem. Instead, ECRS must trust the
-user who is uploading the content. That user must specify appropriate
-keywords and metadata that properly describes the content. Clearly
-this trust may be misplaced. Namespaces can help solve this problem
-since they enable users to learn which other users are trustworthy.
+a keyword-based search? Since the nature of such a search is that the
+initiator does not know precisely what content is desired, it is
+impossible for the query to completely determine the reply. For this
+reason schemes like CHK cannot be applied to the keyword-search
+problem: in CHK, the query completely determines the reply. As a
+result, a keyword-based search mechanism where a query should possibly
+have multiple valid results cannot be implemented based on CHK. Since
+for this kind of search there cannot be any completely deterministic
+link between the keyword and the content, ECRS must trust the user who
+is uploading the content to provide a valid link. That user must
+specify appropriate keywords (and metadata) that properly describes
+the content. Clearly this trust may be misplaced. The uploader may
+specify keywords that have no semantic relation with the content.
+Namespaces can help solve this problem since they enable users to
+learn which uploaders are trustworthy.
\subsection{Namespaces} \label{sblock}
Modified: GNUnet-docs/papers/ecrs/ref.bib
===================================================================
--- GNUnet-docs/papers/ecrs/ref.bib 2005-06-12 17:55:55 UTC (rev 903)
+++ GNUnet-docs/papers/ecrs/ref.bib 2005-06-13 12:00:59 UTC (rev 904)
@@ -3,6 +3,35 @@
address@hidden perng2005csr,
+ author = {Ginger Perng and Michael K. Reiter and Chenxi Wang},
+ title = {Censorship Resistance Revisited},
+ booktitle = {Pre-Proceedings of the 7th International Workshop on
Information Hiding},
+ pages = {279-293},
+ year = {2005},
+ editor = {Jordi Herrera-Joancomarti},
+}
+
address@hidden secure2004goh,
+ author = {Eu-Jin Goh},
+ title = {Secure Indexes},
+ booktitle = {Cryptology ePrint Archive},
+ OPTcrossref = {},
+ OPTkey = {},
+ OPTpages = {},
+ year = {2003},
+ OPTeditor = {},
+ OPTvolume = {},
+ OPTnumber = {},
+ OPTseries = {},
+ OPTaddress = {},
+ month = {Oct},
+ OPTorganization = {},
+ OPTpublisher = {},
+ OPTnote = {},
+ OPTannote = {}
+}
+
@InProceedings{public2004boneh,
author = {Dan Boneh and Giovanni Di Crescenzo and Rafail Ostrovsky and
Guiseppe Persiano},
title = {Public Key Encryption with keyword Search},
Modified: gnunet-gtk/src/download.c
===================================================================
--- gnunet-gtk/src/download.c 2005-06-12 17:55:55 UTC (rev 903)
+++ gnunet-gtk/src/download.c 2005-06-13 12:00:59 UTC (rev 904)
@@ -100,6 +100,9 @@
DIR_SEPARATOR_STR);
strcat(pfx,
name);
+ while ( (strlen(pfx) > 0) &&
+ (pfx[strlen(pfx)-1] == DIR_SEPARATOR) )
+ pfx[strlen(pfx)-1] = '\0';
if (0 == STAT(pfx,
&sbuf)) {
guiMessage(_("File '%s' exists in '%s',\n"
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