Provably secure and efficient certificateless signature in the standard model
Lin Zhang Cheng, Qiaoyan Wen · International Journal of Information and Communication Technology · 2015
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.