Messages in a Concealed Bottle: Achieving Query Content Privacy With Accurate Location-Based Services.

Query privacy has led to a serious concern for location-based services (LBSs). Existing mainstream schemes preserve query privacy by either introducing a third party or degrading the accuracy of LBS. To address these deficiencies, we propose a scheme named the content sealed bottle in this paper for the users to get accurate LBSs while the server learns zero knowledge on the query content. To real...