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Journal of Applied Mathematics
Volume 2014, Article ID 176085, 9 pages
http://dx.doi.org/10.1155/2014/176085
Research Article

A Rational Threshold Signature Model and Protocol Based on Different Permissions

1School of Electronic and Computer Engineering, Peking University, Shenzhen 518055, China
2College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China

Received 3 April 2014; Revised 1 July 2014; Accepted 4 July 2014; Published 23 July 2014

Academic Editor: Young-Sik Jeong

Copyright © 2014 Bojun Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper develops a novel model and protocol used in some specific scenarios, in which the participants of multiple groups with different permissions can finish the signature together. We apply the secret sharing scheme based on difference equation to the private key distribution phase and secret reconstruction phrase of our threshold signature scheme. In addition, our scheme can achieve the signature success because of the punishment strategy of the repeated rational secret sharing. Besides, the bit commitment and verification method used to detect players’ cheating behavior acts as a contributing factor to prevent the internal fraud. Using bit commitments, verifiable parameters, and time sequences, this paper constructs a dynamic game model, which has the features of threshold signature management with different permissions, cheat proof, and forward security.