Technical Report CS0233

Title: A Randomized Protocol for Signing Contracts
Authors: S. Even, O. Goidreich and A. Lempel
Abstract: A randomized protocol for signing contracts, using an arbitrary public key cryptosystem, is presented. The protocol uses an Oblivious Transfer subprotocol, which allows one party to transfer a message to another with probability one half and without knowing whether the other party received it. An implementation of the Oblivious Transfer by any public-key cryptosystem is presented.
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