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.