Efficient Certificate-Based Signcryption Scheme from Bilinear Pairings

Abstract

Signcryption is a public key cryptographic primitive that performs digital signature and public key encryption simultaneously, at lower computational costs and communication overheads than the signature-then-encryption approach. In this paper, an efficient certificate-based signcryption scheme based on bilinear pairings is proposed. As compared to traditional and identity-based signcryption schemes, the proposed scheme has the following advantages: it provides implicit certification; it does not have the private key escrow feature of identity-based signcryption schemes. we also analyze the proposed scheme from security and performance points of view.