DSVN: A Flexible and Secure Data-Sharing Model for VANET Based on Blockchain

Vehicular Ad Hoc Network (VANET) is an important part of the modern intelligent transportation system, which can provide vehicle communication at a certain distance. More importantly, VANET route planning and autonomous driving for drivers by analyzing data. However, VANET’s data privacy security are huge challenge when serving drivers. In this paper, we propose data-sharing model (DSVN) that combines ciphertext-based attribute encryption (CP-ABE), blockchain, InterPlanetary File System (IPFS). DSVN uses outsourced revocable ciphertext policy attribute-based (ORCP-ABE) scheme, improved based on CP-ABE. ORCP-ABE key (KEK) trees to manage user groups revoke user-level attributes. It eliminates redundant attributes in access attribute-weighted trees. Moreover, has no single point failure. We demonstrate indistinguishability under chosen-plaintext attack (IND-CPA) game computational Diffie–Hellman (CDH) assumption. Experimental results show store share with low overhead. Additionally, it users safely.