Even the current pgp encryption scheme offered by some remailers doesn't help much, once the incoming and outgoing messages are known: just take the outgoing message from the remailer, encrypt it with the remailer's public key, compare this to the incoming messages and you know who sent this message (repeat if a chain of remailers was used).
This is incorrect. The message is not encrypted with the public key. It is encrypted with an IDEA key which is encrypted with the remailers public key. Since the remailer does not forward that key (obviously), this attack is not possible. -------------------------------------------------- Lance Cottrell who does not speak for CASS/UCSD loki@nately.ucsd.edu PGP 2.3 key available by finger or server. "Love is a snowmobile racing across the tundra. Suddenly it flips over, pinning you underneath. At night the ice weasels come." --Nietzsche