A novel certificateless deniable authentication protocol

Abstract

Deniable authenticate is a different and attractive authenticate mechanism compared with the traditional authentication. It allows the appointed receiver to identify the identity of the sender, but not to prove the source of a given message to a third party even if the appointed receiver is willing to reveal its private key. Certificateless public key cryptography can solve both the public key certificate management problem of public key infrastructure-based cryptography and the key escrow problem of identity-based cryptography. In this paper, we first define a security model for certificateless deniable authentication protocols. Then we propose a non-interactive certificateless deniable authentication protocol. In addition, we prove its security in the random oracle model. Our protocol can be applied in many actual application scenarios, such as electronic voting, electronic tendering, and online shopping.