Re: [GNUnet-developers] Plausible deniability challenge?

[Kenneth Stailey]

--- Christian Grothoff <address@hidden> wrote:
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> On Saturday 28 June 2003 10:58 am, address@hidden wrote:
> > A question from a Freenet user:
> >
> > One of the ways GNUnet improves on Freenet is that it allows persistent
> > storage. However, since storage space is finite, it requires people to
> > delete files from time to time.
> 
> GNUnet does not require file deletion. 

What happens if you try to insert a file and there's no room to put it
anywhere?

> > If gnunet-delete uses a secret key to allow only the inserter of a file to
> > remove it, can't the presence of that secret key on a user's hard drive be
> > used to prove the user is the originator of that file?
> 
> Well, the "secret" that gnunet-delete currently requires is the entire file. 
> And note that gnunet-delete is intended for indexed files (not inserted 
> files, read docs on insert vs. delete; maybe I should put some more on that 
> in the FAQ). Anyway, you can only delete a file that you indexed and you can 
> only delete it from your local data store. You have no control over pieces 
> that have been distributed to other peers in the meantime. And you don't have
> 
> to delete it. 
> 
> > I haven't been successful at finding much documentation on plausible
> > deniability in GNUnet and the way insertions and deletions work. If I'm
> > grossly misunderstanding something, please let me know.
> 
> Read the "Efficient Sharing of Encrypted Data" paper, that should be the best
> 
> we have on that topic. It has some similarities with Freenet, so take
> "Freenet CHK" as a reference point. There is also the ESED II page 
> (http://www.ovmj.org/GNUnet/encoding.php3) which describes the current 
> implementation in GNUnet (essentially, what is different from the original 
> paper).
> 
> Christian
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> 
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