I don't know if this was supposed to have gone to Bugtraq, or it came to me because I 'visited' their "snoop server" acoupla times. If you already rec'd the original, then "Never Mind".

Date: Thu, 26 Nov 1998 15:33:49 -0800 From: Wei Dai <weidai@eskimo.com> To: cypherpunks@cyberpass.net Cc: onions@itd.nrl.navy.mil Subject: PipeNet 1.1 and b-money Sender: owner-onions@itd.nrl.navy.mil

I've discovered some attacks against the original PipeNet design. The new protocol, PipeNet 1.1, should fix the weaknesses. PipeNet 1.1 uses layered sequence numbers and MACs. This prevents a collusion between a receiver and a subset of switches from tracing the caller by modifying or swaping packets and then watching for garbage.

A description of PipeNet 1.1 is available at http://www.eskimo.com/~weidai.

Also available there is a description of b-money, a new protocol for monetary exchange and contract enforcement for pseudonyms.

Please direct all follow-up discussion of these protocols to cypherpunks.