The survey of location privacy protection

For the past few years, the Location-Based Service (LBS) is becoming more and more important for people's life. On the one hand, it is easy to told people that where is they are anytime, On the other hand, the privacy of location issues attract more and more attention. This paper analyzes the key problems of location privacy protection, and gives a survey of existing work including the model of privacy protection, the anonymous model and the system architecture; finally, some open issues are given.