A New Efficient Leakage-Free Certificateless Signature

摘要

Digital signature, a cryptographic algorithm, provides integrity, authentication and non repudiation messages. In the literature, several certificate less signature schemes have been designed. However, most of them are vulnerable to the ephemeral secret leakage (ESL) attack. We propose a new secure certificate less signature scheme which can resist ESL attacks. Moreover, we prove the security of two types of adversaries in certificate less signature schemes. The proposed scheme provides unforgeability based on the hardness assumption of CDH problem.