A Collaborative Approach to Enhance Security in Location Based Services by Answering Range Queries in WSN

We propose a privacy preserved location monitoring system using wireless sensor network. Here we are using two localized algorithms such as Resource aware algorithm and Quality aware algorithm. Our aim is to provide high quality privacy preserved Location Based Services for the user. If user is giving query , person will receive only aggregate location information based on K-anonymity value which prevent privacy breach in their transaction. By giving latitude and longitude value the user can receive updated location information. The aggregate location contains a cloaked region with number of monitored person residing in that region. In cloaked region there will be N persons in M region The user can get their location information by answering range queries. The system will give high quality privacy preserved location based services for individual persons .If the user is authorized user PIR(Private Information Retrieval) also possible in secure manner. The implementation is done using J2EE technology. Finally this result also compare with lots of existing technologies. Index Terms Location privacy Resource aware, Quality aware algorithm, Aggregate location, KNN query, PIR. ________________________________________________________________________________________________________