SecuCar: Data Loss Prevention for Cloud Assisted VSS Based on Public Auditing Technique

Intelligent and networked vehicle is a popular developing trend in future. However, Data Loss Prevention (DLP) is an import problem need to be solved. Especially, in the Vehicle Sharing System (VSS), the data authority is hard to be guaranteed based on the current technology. VSS provides the users with a convenient way to access vehicles nearby. However, the driving data security which can be used to record the driving conditions cannot be guaranteed by either cloud server or the vehicle. The camera in the cab is also not accepted because it will leak the user's privacy. This article solves this problem based on the cryptography with the public auditing technology. We design a multi-signature scheme so that the OBU and the PDA equipment of the vehicle renter can jointly sign a signature as a meta data for the driving information and upload it to the cloud server together with the raw data. In the event of a dispute, such as a vehicle accident, anyone can conduct an integrity checking with batch jobs on the stored data in the cloud server, so that the cloud and the vehicle renter cannot deny these information. We think that our scheme can be used to prevent some obvious data modification in cloud or as a part of the reference for accident identification. We also use the provable security technology to prove that our protocol is secure, and we realize its core algorithms. The experimental result shows that our scheme is efficient.