Secure message classification services through identity-based signcryption with equality test towards the Internet of vehicles

Abstract

To provide a classification function that has the ability to promote the management of signcrypted messages transmitted by the numerous vehicles in the IoV system, in this paper, we construct an identity-based signcryption with equality test scheme (IBSC-ET) for the first time. Our scheme not only ensures the integrity, confidentiality as well as authentication of messages, but also enables the cloud server to execute the equality test between two ciphertexts signcrypted by the same or different public keys to decide whether the same plaintext is contained, which is counted as the essential factor contributing to the classification. Besides, the identity-based mechanism greatly improves the efficiency since the certificate management problem is avoided. Furthermore, the security of the introduced scheme can be proved in the random oracle model under the Computational Diffie-Hellman Assumption (CDHA) as well as the Bilinear Diffie-Hellman Assumption (BDHA). In the end, the feasibility and efficiency of our proposed are demonstrated through the performance analysis.