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[lsd0001] branch master updated: 96bit IV GCM standard
From: |
gnunet |
Subject: |
[lsd0001] branch master updated: 96bit IV GCM standard |
Date: |
Mon, 05 Oct 2020 15:04:07 +0200 |
This is an automated email from the git hooks/post-receive script.
martin-schanzenbach pushed a commit to branch master
in repository lsd0001.
The following commit(s) were added to refs/heads/master by this push:
new 6a2f014 96bit IV GCM standard
6a2f014 is described below
commit 6a2f014fba26e886d07bcb0cf4773df1580211ca
Author: Martin Schanzenbach <mschanzenbach@posteo.de>
AuthorDate: Mon Oct 5 14:57:14 2020 +0200
96bit IV GCM standard
---
draft-schanzen-gns.xml | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 341e4b1..35d02e7 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -743,14 +743,14 @@ BDATA := C|T = GCM-AES-256(K, IV, RDATA)
PRK_k := HKDF-Extract ("gns-aes-ctx-key", zk)
PRK_n := HKDF-Extract ("gns-aes-ctx-iv", zk)
K := HKDF-Expand (PRK_k, label, 256 / 8);
-IV := HKDF-Expand (PRK_n, label, 128 / 8)
+IV := HKDF-Expand (PRK_n, label, 96 / 8)
]]></artwork>
<t>
HKDF is a hash-based key derivation function as defined in
<xref target="RFC5869" />. Specifically, HMAC-SHA512 is used for the
extraction phase and HMAC-SHA256 for the expansion phase.
The output keying material is 32 octets (256 bits) for the symmetric
- key and 16 octets (128 bits) for the IV.
+ key and 12 octets (96 bits) for the IV.
The symmetric key "K" is a 256-bit AES <xref target="RFC3826" />
key.
</t>
</section>
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