Survey of location privacy-preserving

With blooming of sensor and wireless mobile devices,it is easy to access mobile users’ location information anytime and anywhere. On one hand,Location Based Service(LBS) is becoming more and more valuable and important. On the other hand,location privacy issues raised by such applications have also grasped more and more attention. However,due to the specificity of location information,traditional privacy-preserving techniques in data publish can not be used. The paper analyzes the challenges of location privacy-preserving,and gives a survey of existing work including the system architecture,location anonymity and query processing. Finally,some open issues are given at the end of the paper.