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《Journal of Xidian University》 2007-05
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Efficient group signature scheme with verifier-local revocation

ZHANG Yue-yu,PANG Liao-jun,SU Wan-li,WANG Yu-min(Ministry of Edu.Key Lab.of Computer Network and Information Scurity,Xidian Univ.,Xi'an 710071,China)  
A verifier-local revocation group signature scheme with backward unlinkability is proposed based on the scheme presented by Boneh and Shacham.In our scheme,the private key to a group member is a triple consisting of the key obtained from the key issuer and that generated by the member,thus realizing strong exculpability.Also,we solve the problem that the running time of signature verification is linearly dependent on the length of revocation list using zero knowledge under Decision Linear Diffie-Hellman assumption,so the verification of our scheme requires only three multi-exponentiations and one paring computation.Further,our scheme realizes the backward unlinkability based on the concept of time intervals and is only 1553bits in size.
【Fund】: 国家自然科学基金资助(60473072 60772736);; 陕西省自然科学基础计划基金资助(2007F37)
【CateGory Index】: TP309
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