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Lecture Notes in Computer Science
A contract signing protocol lets two parties exchange digital signatures on a pre-agreed text. Optimistic contract signing protocols enable the signers to do so without invoking a trusted third party. However, an adjudicating third party remains available should one or both signers seek timely resolution. We analyze optimistic contract signing protocols using a game-theoretic approach and prove a fundamental impossibility result: in any fair, optimistic, timely protocol, an optimistic playerdoi:10.1007/978-3-540-45187-7_24 fatcat:f3evyv5ewvd3vfukdo3j7s32i4