A Fully Anonymous Identity-Based Signcryption Scheme in the Standard Model

Abstract

Anonymity of user is an important property in the cryptographic protocol, to protect the privacy of the participants. In this paper, we propose a new primitive, fully anonymous signcryption, which provide anonymity of both sender and receiver along with the advantage of traditional ring signcryption (only provides anonymity of sender) scheme. We also construct a fully anonymous identity-based signcryption scheme in the standard model. The proposed scheme satisfies the semantic security, unforgeability and full anonymity.