In order to solve the security threat of user location information and query information privacy leaked easily in loca- tion-based services, this paper built a location-based service （LBS） privacy protection model and developed an example rely on the technology of one dimensional coding of Geohash geographic information, MemCached server cluster, encryption and authentication technology etc. The results of simulation experiments and data measurements show that the model reaches k-ano- nymity effect and also has a preferable performance in avo...
