From: "Mark W. Eichin" <eichin@paycheck.cygnus.com> You'd need a good way of breaking up the message; if you were encrypting already, it'd probably do well enough to put byte x into message (x mod n) where you're sending n messages. (You could even slice it at the bit level, but that's a little harder to do in a trivial script...)
It would be easy enough to split the message by XOR into as many pieces as you wish. This would be much more secure than an every-nth-byte division, though it would increase total traffic correspondingly. Taking into account the non-ideality of the remailer net, using m-of-n secret sharing would be more reliable. It's not clear to me that this buys you much, though. Encrypting the message end-to-end will suffice to keep it private. What remailers do for you is impede traffic analysis. Sending your message in n pieces gives a traffic watcher n chances. Eli ebrandt@jarthur.claremont.edu