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Erschienen in:
2006 | OriginalPaper | Buchkapitel
A Synchronous Multi-Party Contract Signing Protocol Improving Lower Bound of Steps
verfasst von : Jianying Zhou, Jose A. Onieva, Javier Lopez
Erschienen in: Security and Privacy in Dynamic Environments
Verlag: Springer US
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Contract signing is a fundamental service in doing business. The Internet has facilitated the electronic commerce, and it is necessary to find appropriate mechanisms for contract signing in the digital world. A number of two-party contract signing protocols have been proposed with various features. Nevertheless, in some applications, a contract may need to be signed by multiple parties. Less research has been done on multi-party contract signing. In this paper, we propose a new synchronous multi-party contract signing protocol that, with
n
parties, it reaches a lower bound of 3(
n
− 1) steps in the all-honest case and 4
n
− 2 steps in the worst case (i.e., all parties contact the trusted third party). This is so far the most efficient synchronous multi-party contract signing protocol in terms of the number of messages required. We further consider the additional features like timeliness and abuse-freeness in the improved version.