ID-Based (t,n) Threshold Proxy Signcryption for Multi-agent Systems

Authors:
Fagen Li;Yupu Hu;Shuanggen Liu
Affiliations:
Key Laboratory of Computer Networks and Information Security, Xidian University, Xi'an 710071, China and School of Computer Science and Engineering, University of Electronic Science and Technology ...;Key Laboratory of Computer Networks and Information Security, Xidian University, Xi'an 710071, China;Key Laboratory of Computer Networks and Information Security, Xidian University, Xi'an 710071, China and College of Computer Information Engineering, Jiangxi Normal University, Nanchang 330022, Ch ...
Venue:
Computational Intelligence and Security
Year:
2007

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Abstract

A (t,n) threshold proxy signcryption scheme allows tor more proxy signcrypters from a designated group of nproxy signcrypters to signcrypt messages on behalf of an original signcrypter. In this paper, an identity-based (t,n) threshold proxy signcryption scheme using bilinear pairings is proposed. Our construction is based on Baek and Zheng's pairing-based verifiable secret sharing scheme and Libert and Quisquater's identity-based signcryption scheme. As compared to the previous threshold proxy signcryption schemes, the key management problem in our scheme is simplified because of using identity-based cryptography. We also present an application of our scheme in multi-agent systems.