A Synchronous Multi-Party Contract Signing Protocol Improving Lower Bound of Steps

TitleA Synchronous Multi-Party Contract Signing Protocol Improving Lower Bound of Steps
Publication TypeConference Paper
Year of Publication2006
AuthorsJ. Zhou, J. A. Onieva, and J. Lopez
Conference Name21st International Information Security Conference (IFIP SEC’06)
Series TitleLNCS
Pagination221-232
Date PublishedMay
PublisherSpringer
Abstract

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 4n − 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.

Citation KeyJianyingZhou2006
Paper File: 
https://www.nics.uma.es/sites/default/files/papers/JianyingZhou2006.pdf