A Novel Approach on Privacy Preserving Local Proofs for Mobile Users Security

Abstract

Nowadays location based services are rapidly becoming popular. Many services which are based on user’s location can also use the user’s location history or their spatial-temporal provenance. It uses GPS technology. Global Positioning System (GPS) is a satellite-based navigation system made up of a network of different satellites. Malicious users may lie about their spatial-temporal provenance without a carefully designed security system for users to prove their past locations. An acronym STAMP stands for Spatial Temporal Provenance Assurance with Mutual Proofs. Basically STAMP is designed for ad-hoc mobile users generating location proofs for each other in a distributed setting. So it can easily accommodate trusted mobile users and wireless access points. STAMP ensures the integrity and non-transferability of the location proofs and protects user’s privacy. A semi-trusted certification Authority is used to distribute cryptographic keys as well as guard users against collusion by light-weight entropy based trust evaluation approach. STAMP is low-cost in terms of computational and storage resources. This protocol is designed to maximize user’s anonymity and location privacy. Here users are given the control over the location granularity of their STP proofs. STAMP is collusion resistant. An entropy-based trust model is proposed to detect users mutually generating fake proofs for each other.