17 Dec
2003
17 Dec
'03
11:17 p.m.
On Fri, 12 Jan 1996 10:55:12 -0800, you wrote:
Cypherpunks: is there any way to respond to, or prevent, this sort of attack short of actually shutting down the remailer?
Yes, very simply. The remailer could calculate a hash for the body of each encrypted message received (the same portion which will be decrypted by PGP), tabulate the last few thousand hashes, and simply discard any messages with a duplicate hash. The target of the attack would receive only the first copy of the message.