VLSP: Enabling Location Privacy in Vehicular Location Based Services

In this paper, we present VLSP, a Vehicular Location based Service with Privacy grantees. In VLSP, we assume the service provider is untrusted and users do not have pre-established social relationships with each other, we use standard cryptographic primitives, Broadcast Encryption (BE) and Attribute-based Encryption (ABE) to provide privacy guarantees. By using VLSP, we are able to protect users´ location privacy in vehicular location sharing social services. VLSP is mainly composed with three parts: OBUs, RSUs, and vehicular location sharing service provider. RSUs use RFID readers to communicate with users´ OBUs to log users´ locations, and uses standard cryptographic primitives and BE-based mechanism to establish trust and protect privacy for users who share their location information. We leverage ABE-based mechanism on service provider to control who can see users´ location information. We evaluate VLSP using protocol, security and system implementation analysis, and find VLSP is both privacy-preserving and feasible.