Efficient Identity Based Signcryption Scheme with Public Veriflability and Forward Security

摘要

In this paper, we point out that Lihert and Quisquater's signcryption scheme cannot provide public vcri-fiability. Then we present a new identity based signcryption scheme using quadratic residue and pairings over elliptic curves. It combines the functionalities of both public verifia-bility and forward security at the same time. Under the Bilinear Diffie-Hellman and quadratic residue assumption, we describe the new scheme that is more secure and can be somewhat more efficient than Libert and Quisquater's one.