Blind and certificateless verifiably encrypted signature scheme

Abstract

The fairness of verifiable encrypted signature scheme is completely determined by the arbitrators neutral problem,which reduces the security of signature exchange. In order to deal with this issue,using the properties of bilinear pairings and combining with certificateless public key cryptography and verifiable encrypted signature,a blind verifiable encrypted signature was designed without certificate. The adjudicator in this scheme cannot restore the original signature directly,thereby the security of exchange signature protocols was enhanced. The proposed scheme was also provably secure in the random oracle module under Discrete Logarithm Problem(DLP) and Computational Differ-Hellman Problem(CDHP)assumption.