A Data Sharing Scheme for Internet of Vehicles Based on Reputation Mechanism and Attribute Encryption

To solve the problems of sensitive data leakage, authenticity and reliability verification of data, and multi-user information sharing in the Internet of Vehicles (IoV) environment. The article proposes a data-sharing scheme for IoV based on reputation mechanism and attribute encryption. The scheme adopts the AES-GCM mode to encrypt data and uses the CPABE algorithm to encrypt the key of AES-GCM to ensure the confidentiality and integrity of the data and, at the same time, to improve the efficiency of encryption and decryption for users; it combines the reputation mechanism and blockchain to determine the authenticity of the data and store the encrypted data in the roadside unit (RSU) in a distributed manner; Fine-grained searching of large amounts of encrypted data is achieved using multi-keyword attribute-based searchable encryption. Finally, the scheme is analyzed in detail in terms of security and performance overhead, and the results show that the scheme has good security and high efficiency and is suitable for multi-user data sharing in the IoV environment.