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Publications: Abstract

An Efficient Fair Payment System

Jan Camenisch and Jean-Marc Piveteau and Markus Stadler

Many proposed payment systems allow the payer to remain anonymous during a transaction. However, this unconditional privacy protection could be misused by criminals, e.g. for blackmailing or money laundering. With a fair payment system, anonymous payments are still possible, but the anonymity can be removed with the help of a trusted party which need not be involved in the transaction itself. In this paper, we present an efficient fair payment system and we discuss its security.