International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 17 June 2014

Lin Cheng, Qiaoyan Wen, Zhengping Jin, Hua Zhang
ePrint Report ePrint Report
Certificateless public key cryptography eliminates inherent key escrow problem in identity-based cryptography, and does not yet requires certificates as in the traditional public key infrastructure. However, most of certificateless signature schemes without random oracles have been demonstrated to be insecure. In this paper, we propose a new certificateless signature scheme and prove that our new scheme is existentially unforgeable against adaptively chosen message attack in the standard model. Performance analysis shows that our new scheme has shorter system parameters, shorter length of signature, and higher computational efficiency than the previous schemes in the standard model.

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