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Re: Anonymous Remailers
On Fri, May 16, 1997 at 10:27:19AM +0100, Adam Back wrote:
>
> Kent Crispin <[email protected]> writes:
> > [about remailers]
> > Hmm. I did read, and I thought I understood this. I claim that if
> > the remailers collude, then there in no anonymity. Correct? Even if I
> > insert my own remailer in the list it doesn't help, if the others are
> > all in cahoots. This seems pretty obvious. They all compare logs,
> > and saved copies of the messages, and my message can be tracked from
> > beginning to end. Right?
>
> Not entirely.
>
> If other people use your remailer also, and you have latency, they'll
> see n messages going into your remailer, and n come out. There will
> be log2(n) entropy added, they won't know which of those are from you
> and which from the other users.
>
> Flooding attacks might make the situation worse, say you wonder if all
> of the messages apart from your own are from the attackers, and that
> the purpose of these messages is to flush your message out of the
> mixing pool.
And of course, in some environments running a remailer would be highly
suspicious -- even more so if it is a *public* remailer.
--
Kent Crispin "No reason to get excited",
[email protected] the thief he kindly spoke...
PGP fingerprint: B1 8B 72 ED 55 21 5E 44 61 F4 58 0F 72 10 65 55
http://songbird.com/kent/pgp_key.html