一种基于短签名和离线半可信第三方的公平交换协议

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A fair exchange protocol based on short signature with the off-line semi-trusted third party

XIN Xiang-jun1,2;LI Fa-gen3;XIAO Guo-zhen1

(1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071，China;2. Dept. of Information and Computing Science, Zhengzhou Univ. of Light Industry, Zhengzhou 450002，China;3. Ministry of Edu. Key Lab. of Computer Networks and Information Security, Xidian Univ., Xi′an 710071，China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-02-20 Published:2007-02-25

Abstract

Abstract: Based on a short signature scheme and discrete logarithm problem, a new fair exchange protocol with the off-line semi-Trusted Third Party (TTP) is proposed. The off-line semi-TTP intervenes into the protocol in case of trouble, which makes the fair exchange optimistic. The off-line TTP need not be completely trusted, since it can get neither signature exchanged when disputation is solved. Because this protocol is based on short signature, which needs low storage and little communication, it can be used in low-bandwidth communication and low-storage environments.

Key words: short signature, digital signature, fair exchange protocol, E-commerce

CLC Number:

TN918.1

XIN Xiang-jun1;2;LI Fa-gen3;XIAO Guo-zhen1. A fair exchange protocol based on short signature with the off-line semi-trusted third party
[J].J4, 2007, 34(1): 92-95.

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A fair exchange protocol based on short signature with the off-line semi-trusted third party

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