Heterogeneous Signcryption Scheme From PKI to IBC With Multi-Ciphertext Equality Test in Internet of Vehicles

With the arrival of the era of self-driving technology, 5G, and IoT technology, self-driving car Internet technology is gradually changing the way people travel. The existing signcryption scheme test scheme with equality can only compare two ciphertexts, which is not suitable for the complex network of Internet of vehicles. To address this challenge, we propose the heterogeneous signcryption scheme from public key infrastructure (PKI) to identity-based cryptosystem (IBC) with multi-ciphertext equality test in the Internet of vehicles (HSCPI-MET). This scheme enables to communicate from PKI cryptosystem to IBC cryptosystem in Internet of vehicles, at the same time excuting the equality test of multi-ciphertext. Our scheme protects inter-vehicle communication data from being illegally accessed, tampered, or forged by malicious vehicles. The proposed scheme satisfies confidentiality and unforgeability under the stochastic predictor model for the computational Diffie–Hellman assumption and the IDH assumption. In addition, we conduct a rigorous experimental evaluation of the scheme to prove that it is secure and effective in practical applications.