Research And Application Of Mobile Privacy Protection Scheme In Location-based Services

The widespread use of technologies such as the Internet and precise positioning,as well as the popularity of smart mobile terminals,has led to the rapid developmentof location-based services.Although location-based services facilitate people’s life and travel,there is also a serious risk of personal privacy leakage.When users use locationbased services,they want to ensure the confidentiality of the communication content and the privacy of the user’s location.The confidentiality of the communication content can be guaranteed by encryption technology,and the user’s location privacy can be achieved with the help of anonymous communication technology.Therefore,this thesis introduces encryption technology and anonymous communication technology into location-based services,and proposes a mobile privacy protection scheme in locationbased services,which can ensure the security of communication content and protect users’ location privacy.The research content of this thesis mainly includes the following aspects:(1)Design a mobile privacy protection scheme that combines random onion routing and hybrid encryption technology.Apply it to mobile location services,and a mobile privacy protection scheme in location-based services is proposed.A number of nodes are randomly selected to construct an onion path before communication.Each layer of the path is encrypted,so that each transit node can only obtain the information of its previous and after nodes.The communication content between the user and the server is mixed encrypted to ensure the security of query requests,query results and user location privacy.(2)The anonymity degree of the scheme is analyzed and calculated,and the anonymity degree calculation formula is given to calculate the anonymity degree when there are attackers and malicious nodes in the system.Prove the privacy of the user’s location,the confidentiality of query requests and query results.The security of the scheme is discussed in terms of robustness and resistance to common network attacks,and this scheme is compared with the location privacy protection schemes proposed by others.This scheme can meet the needs of users for identity location privacy and communication content confidentiality,and the scheme has good robustness and ability to resist attacks.(3)Simulation experiments are conducted for the scheme.The experimental results show that when the total number of nodes in the system and the length of randomly generated onion paths are increased,the average response time of the system increases approximately linearly,and the increase is relatively small,indicating that the system has good scalability and robustness.Compare this proposal with those proposed by others.(4)In order to verify the feasibility of the scheme,an anonymous mobile location service system was developed.This scheme is applied to the location service system for analysis and design,and the development of the system is completed.The system achieves the expected goal,which can ensure the privacy of the user’s location and the security of the communication content.