Title :
Improvement of BW Multi-party Contract Signing Protocol: Model and Formal Analysis
Author :
Li, Xiangdong ; Wang, Qingxian ; Jin, Xiaoyan
Author_Institution :
Inst. of Inf. Eng., Inf. Eng. Univ., Zhengzhou, China
fDate :
March 31 2009-April 2 2009
Abstract :
A multi-party contract signing (MPCS) protocol allows a set of parties to exchange messages with each other to arrive in a state in which either each of them has a pre-agreed contract text signed by all the others, or none of them does. This paper proposed an improvement on the optimistic MPCS protocol described by Baum-Waidner and Waidner (BW). The number of rounds is reduced to two and the message transmission number to O(n2), which is the best known so far. Protocol modeling and formal definition of fairness are presented in the strand space model, and formal analysis shows that fairness is satisfied in the new protocol.
Keywords :
computational complexity; protocols; BW multiparty contract signing protocol; Baum-Waidner protocol; formal analysis; message transmission number; protocol modeling; strand space model; Aerospace control; Clocks; Computer science; Contracts; Cryptographic protocols; Cryptography; Design optimization; Information analysis; fairness; formal analysis; multi-party contract signing; strand spaces;
Conference_Titel :
Computer Science and Information Engineering, 2009 WRI World Congress on
Conference_Location :
Los Angeles, CA
Print_ISBN :
978-0-7695-3507-4
DOI :
10.1109/CSIE.2009.780
