Secure Signcryption Scheme Based on a Hybrid Encryption

Signcryption is a practical technique to achieve message confidentiality and authenticity simultaneously. In this paper, a secure and efficient signcryption scheme based on hybrid encryption is studied. Following the schemes DHEtM and DHEtS, we propose a new signcryption scheme: DHEMS. DHEMS integrates the hybrid encryption scheme DHIES and the shorted signature scheme SDSS together. It can obtain the IND-CCA security for confidentiality and INT-CCA security for authentication based on its base primitives. Moreover, it provides non-repudiation and public verifiability and is insider security in a well defined security model.