ID-based threshold proxy signcryption scheme from bilinear pairings

Authors:
Fagen Li;Xiangjun Xin;Yupu Hu
Affiliations:
School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, PR China.;Department of Information and Computing Science, Zhengzhou University of Light Industry, Zhengzhou 450002, Henan, PR China.;Key Laboratory of Computer Networks and Information Security, Xidian University, Xi
Venue:
International Journal of Security and Networks
Year:
2008

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Abstract

A (t, n) threshold proxy signcryption scheme allows t or more proxy signcrypters from a designated group of n proxy signcrypters to signcrypt messages on behalf of an original signcrypter. In this paper, a new identity-based threshold proxy signcryption scheme from 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 Wang and Liu's identity-based threshold proxy signcryption scheme, our scheme is more secure and efficient.