Achieving Personalized Privacy and Compromised Conspiracy in Location Proof Updating System

Abstract

Abstract- An alibi is a form of defense used in criminal procedure wherein the accused attempts to prove that he or she was in some other place at the time the alleged offense was committed. Today’s location-sensitive service relies on user’s mobile device to determine the current location. This allows malicious users to access a restricted resource or provide bogus alibis by cheating on their locations. To address this issue, we propose A Privacy-Preserving Location proof Updating System in which collocated Bluetooth enabled mobile devices mutually generate location proofs and send updates to a location proof server. Periodically changed pseudonyms are used by the mobile devices to protect from the untrusted location proof server. In order to defend against colluding attacks, we also present betweeness ranking-based and correlation clustering-based approaches for outlier detection. APPLAUS can be implemented with existing network infrastructure, and can be easily deployed in Bluetooth enabled mobile devices with little computation or power cost. Extensive experimental results show that APPLAUS can effectively provide location proofs, significantly preserve the source location privacy, and effectively detect colluding attacks In addition We propose two in-network aggregate location anonymization algorithms, namely, resource-and quality-aware algorithms. Both algorithms require the sensor nodes to collaborate with each other to blur their sensing areas into cloaked areas, such that each cloaked area contains at least k persons to constitute a k-anonymous cloaked area This helps the system to enable and provide high-quality location monitoring services for system users, while preserving personal location privacy. Index Terms- Wireless sensor networks (WSN), source location, privacy, pseudonyms, colluding attacks. 1