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《Journal of Wuhan University(Natural Science Edition)》 2018-05
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A Security-Provable Proxy Aggregate Signature Scheme

ZHANG Qing;HE Wei;DAI Kuobin;HU Zhihua;Computer School,Huanggang Normal University;College of Computer Science,China University of Geosciences;School of Computer,Wuhan University;  
By the analysis of existing proxy aggregate signature schemes,we find that the KGC-distributed key is based on a hypothetic secure channel,which is likely to have security holes in practical applications.If the private key is divulged during KGC key distribution,a valid signature for any information can be successfully forged.Based on bilinear pairings,this paper presents a security-provable proxy aggregate signature scheme,in which the public key is generated by KGC and the user so that the signature will not be forged even if the private key is given away during KGC key distribution.Under random oracle model,agame between the opponent and the challenger proves that the security of the presented scheme can be reduced to CDH(Compute Diffie-Hellman)problem even if the opponent obtains the maximum relevant permissions.At the same time,it's verified that the computational efficiency of the scheme is much higher than that of other schemes.
【Fund】: 湖北省自然科学基金资助项目(2014CFC1100 2013CFB473 2012FFC034)
【CateGory Index】: TN918.91
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