Cryptology ePrint Archive: Report 2012/152

On security of a Certificateless Aggregate Signature Scheme

Limin Shen, Yinxia Sun

Abstract: Aggregate signatures are useful in special areas where the signatures on many different messages generated by many different users need to be compressed. Recently, Xiong et al. proposed a certificateless aggregate signature scheme provably secure in the random oracle model under the Computational Diffie-Hellman assumption. Unfortunately, by giving concrete attacks, we indicate that Xiong et al. aggregate signature scheme does not meet the basic requirement of unforgeability.

Category / Keywords: public-key cryptography / Aggregate signature, Certificateless aggregate signature, Unforgeability, Computational Diffie-Hellman problem

Date: received 22 Mar 2012, last revised 4 Apr 2012

Contact author: shenlimin at njnu edu cn

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Version: 20120405:002203 (All versions of this report)

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