Authors: Yinxia Sun; Limin Shen
Addresses: School of Computer Science and Technology, Nanjing Normal University, Nanjing, China ' School of Computer Science and Technology, Nanjing Normal University, Nanjing, China
Abstract: How to revoke a user is an important problem in public key cryptosystems. Free of key escrow and costly certificate management, the certificateless public key cryptosystem (CLPKC) is advantageous over both the identity-based public key system and the traditional public key system . However, there are few solutions to the revocation problem in CLPKC. In this paper, we present an efficient revocable certificateless signature scheme. This new scheme can revoke a user with high efficiency. We also give a method to improve the scheme to be signing-key-exposure-resilient. Based on the discrete logarithm problem, our scheme is provably secure.
Keywords: revocation; certificateless signature; without pairing; DL problem.
International Journal of Computational Science and Engineering, 2019 Vol.19 No.1, pp.46 - 52
Received: 07 Sep 2016
Accepted: 06 Feb 2017
Published online: 02 May 2019 *