I am trying to hunt up a copy of: The Dining Cryptographers in the Disco: Unconditional Sender and Recipient Untracability with Computationally Secure Serviceability by Michael Waidner and Birgit Pfitzmann So far the only ref I have found is the abstract in Eurocrypt '89, but I can't seem to locate a copy of the entire paper. If anyone knows of where I might find a copy I would appreciate it... jim