A lightweight privacy preserving distributed certificate-less aggregate based mutual authentication scheme for vehicular adhoc networks

Traffic data generated by the vehicles are often transported in a wide open wireless communication channel which poses several security and privacy vulnerabilities. In case of any malicious or illicit behavior exhibited by the vehicles, it is difficult to trace back the original identity. Hence message authentication and traceability plays a major role in achieving the stability of the network. To address the objectives of message authentication and traceability, a lightweight privacy preserving distributed certificate-less aggregate signature authentication technique has been proposed. The proposed work utilized pseudo-identity and partial private keys which are distributed to perform mutual authentication and key revocation in case of legal proceedings that incurs computations which are lightweight. Formal and informal security analysis has been provided to demonstrate the strength of the authentication scheme using random-oracle model. In this work, the experiment has been carried by utilizing MIRACL C +  + cryptographic library and by OMNET +  + Simulator. The proposed scheme performs mutual authentication using certificate-less scheme thereby reducing the computational cost of 2.0284 ms with a reduction in the verification delay around 90% when compared with the other existing authentication schemes.