Improving obfuscated key generation phase for secret pairwise vehicular communication sessions

摘要

Intelligent vehicles in vehicular networks can share secret communication sessions that no outsider decrypts. The hybrid encryption of Elliptic Curve Integrated Encryption Scheme (ECIES) and the symmetric encryption of the Advanced Encryption Standard (AES) are harnessed by the existing standards to accomplish this purpose. In addition, in a previous study, we introduced a third alternative: the Boneh-Goh-Nissim-Blom (BGN-Blom) scheme for confidentializing the communication in such secret sessions. BGN-Blom generates a somewhat homomorphically encrypted keys between any two involved communicating vehicles avoiding the critical length of AES keys and the need for pre-authentication in ECIES. This work extends the original BGN-Blom model by three extra modifications that achieve similar security measures and are more cost-effective in terms of computation and communication overheads.