A traceable certificateless threshold proxy signature scheme from bilinear pairings

Authors:
Tao Yang;Hu Xiong;Jianbin Hu;Yonggang Wang;Yong Deng;Biao Xiao;Zhong Chen
Affiliations:
MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China;MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China;MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China;MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China;MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China;School of Computer and Information Technology, Northern Jiaotong University, China;MoE Key Lab of Network and Software Assurance and Network & Information Security Lab, Institute of Software, Peking University, China
Venue:
APWeb'11 Proceedings of the 13th Asia-Pacific web conference on Web technologies and applications
Year:
2011

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Abstract

Using our (t, n) threshold proxy signature scheme, the original signer can delegate the power of signing messages to a designated proxy group of n members. Any t or more proxy signers of the group can cooperatively issue a proxy signature on behalf of the original signer, but t-1 or less proxy signers cannot. Recently, in order to eliminate the use of certificates in certified public key cryptography and the key-escrow problem in identity-based cryptography, the notion of certificateless public key cryptography was introduced. In this paper, we present a traceable certificateless threshold proxy signature scheme based on bilinear pairings. For the privacy protection, all proxy signers remain anonymous but can be traceable by KGC through a tag setting. We show the scheme satisfies the security requirements in the random oracle model. To the best of our knowledge, our scheme is the first traceable certificateless threshold proxy signature scheme from bilinear pairings.