An efficient certificateless public key encryption with equality test toward Internet of Vehicles

With the rapid development of the Internet of Vehicles, a great amount of vehicles are connected to Internet of Vehicles environment. These vehicles can exchange data to each other and upload the data to a cloud server for backup. Since the data contains some sensitive information, it is necessary to encrypt the data before uploading to the cloud server. However, this method severely hampers the utilization of data because of the tremendous difficulty in the search for encrypted data. For addressing the above issue, we propose a novel certificateless public key encryption supporting the equality test on ciphertexts that are performed by the cloud server while revealing nothing about the corresponding plaintexts. Our scheme has proved to be secure in bilinear Diffie-Hellman assumption under the model of random oracle. At the same time, both theoretical analysis and experimental evaluation indicate the security, efficiency, as well as effectiveness of the proposed scheme.