Patent Number: 5682430 Inventor(s): Kilian, Joseph John{#buSako, Kazue#}

The full text is available at <http://patent.womplex.ibm.com>. The novelty in this patent is an algorithm that uses Fiat-Shamir to prove that the mixes operate correctly. The general idea of using non-interactive zero-knowledge proofs to verify that mixes follow the protocol was already published by Rackoff and Simon in 1991, although that is not acknowledged in the patent specification. Does anyone have details about Kilian's patent application on identity escrow, other than the paper at <http://www.princeton.edu/~erez/ident.ps>?