Re: [Qemu-devel] building a virus-proof PC with Qemu

[Andreu Escudero]

Seems absurd to me...
Haw will you now if a byte comes from a "trusted source"?
And if you know what is a trusted source and what is not... you don't
need anything like extrange imformation propagation...



On Tue, 23 Nov 2004 13:31:59 +0100, Piotras <address@hidden> wrote:
> Hi!
> 
> Imagine that with every byte stored on disk image, the emulated
> memory and CPU registers we associate a flag indicating if the
> byte come from "trusted" source. This information would propagate
> with every memory/disk access (data-flow tracking).
> 
> Before Qemu would translate a block of code the trusted bits could
> be checked to see if the code is "trusted". Of course there are
> issues with dynamic loaders, dynamic compilers, etc. And it's not
> going to work well with scripted code.
> 
> Possible usage:
>   * building virus-proof PC,
>   * automate hunting for worms/exploits on Internet.
> 
> Opinions?
> 
> Piotrek
> 
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