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New Contract Signing Protocol with Semi-Trusted Third Party

Caifen Wang

Abstract

Verifiable encryption plays an important role in fair exchange. A new verifiable encryption with blind decryption scheme is given in the paper. Based on the scheme, this paper presents new contract signing protocols with semi-trusted third party. It also outlines a one-to-many version. The protocol is practical and solves an open problem presented by Franklin. It is the first multi-party contract signing protocols with semi-trusted third party.

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Available abstract

Key concepts: Verifiable secret sharing, Computer science, Trusted third party, Computer security, Protocol (science), Encryption, Scheme (mathematics), Third party