| With the deepening of applications such as location services and social networks,the contradiction between privacy protection and quality of service has intensified.To get a good information services,only to sacrifice part of the privacy for the exchange,there is a relationship between cooperation and competition.In view of this situation,we design a differential privacy incentive compatible mechanism under clarified the meaning of differential privacy protection parameter ε by introducing the rational participants of selfishness and combining with differential privacy protection technologies.Under the constraint of the mechanism,we construct a game model of differential privacy and service availability,and from a rational point of view to solve the privacy and quality of service Optimal balance.And apply it to the privacy protection of mobile users’ location data or motion trajectory data.The main study works of this paper are as follows:(1)For the user is unclear about the significance of the differential privacy protection parameter ε,a new attack moder,which can be used to choose the value for the parameter εwas proposed.Based on the model,an attack algorithm is proposed.Finally,a calculation method for the selected parameters is given,which allows the user to better understand the importance of the parameter ε,and lays a foundation for the following research.(2)For data curators are trusted,when differential privacy is used to interactive or non-interactive framework with data manipulation.We design a differential privacy incentive compatible mechanism based on the incentive compatible theory.Through this mechanism,the data manager will truthfully report the truth while realizing the privacy protection.The differential privacy data is given to the data analyst,and the process and implementation algorithm of the mechanism are given.Finally,it is proved that the designed mechanism meets the incentive compatible and differential privacy.(3)Under the constraint of differential privacy incentive compatible mechanism,a gamemodel of differential privacy and availability is constructed based on the extensive form game.The benefits of users and service providers are analyzed,and privacy metrics functions and utility metrics functions are established.Secondly,using the inverse induction method to analyze the equilibrium of the game.Finally,using the actual trajectory data of the mobile users at Guizhou University to simulate the model,the experimental results show that the model is reasonable. |
