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| Provably Secure Certificateless Aggregate Signature with Constant Length |
| LU Hai-Jun, YU Xiu-Yuan, XIE Qi |
| (School of Information Science and Engineering; Institute of Cryptology and Its Applications,Hangzhou Normal University, Hangzhou 310036, China) |
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Abstract Certificateless cryptosystem can solve the key escrow of IDbased cryptosystem and the public key authentication of certificationbased cryptosystem. A formal model of certificateless aggregate signature was proposed. It also proposed a concrete certificateless aggregate signature scheme, in which the length of the signature is independent of the signers. Based on the hardness of computational DiffieHellman problem, the proposed scheme is secure against existential forgery under adaptive chosen messages and identities in random oracle mode.
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Received: 25 April 2011
Published: 28 February 2012
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