Privacy protection scheme based on certificateless in VSN s environment

In vehicular social networks (VSN s), cloud service providers can provide many convenient services for vehicles to ensure the safety of driving. However, the wireless communication between entities in VSN s is vulnerable to attacks, which can lead to vehicle privacy leakage. To solve this problem, a certificateless searchable encryption scheme with privacy-preserving features that can resist keyword guessing attacks is proposed based on the VSN s application environment. The scheme combines proxy re-encryption technology, which enables vehicle users to obtain accurate request results without disclosing privacy information to cloud service providers, and achieves the privacy of vehicle identity and confidentiality of transmitted data. In addition, the authorization process of the data service provider not only ensures the security of the data but also achieves revocability of user authorization. Based on the computational Diffie-Hellman problem and the discrete logarithm problem, the scheme is proved to be resistant to internal or external keyword guessing attacks under the random oracle model, and the experimental results show that the scheme has better performance in terms of computational and communication efficiency.