Research On Group Key Agreement For User Location Sharing

With the rapid development of Internet of things technology,information sharing service is gradually widely used.In the actual application process,when the intelligent terminal interacts with the server,it is often attacked by the third party.In the traditional centralized information management mode,when the server is regarded as the trusted third party,it will constantly appear many problems such as location privacy leakage and location information tampering.These problems bring huge security risks to the user’s privacy.Therefore,it is very important to protect the intelligent terminal to share the location information in the secure network environment.In this paper,it studies and analyzes that the existing location sharing schemes at home and abroad,the main work includes:(1)This paper analyzes the problems existing in traditional key agreement,then it constructs a model of group key agreement based on multi-dimensional virtual permutation according to the scheme analysis and multi-dimensional virtual permutation mechanism,and illustrates the construction characteristics of four-dimensional permutation network.In the light of the logical reasoning rules of BAN,the model is analyzed logically,and it is proved that the model can realize multi-user key agreement without the help of the trusted third party.(2)On the basis of the model,a multi-user location sharing scheme based on multi-dimensional virtual permutation is proposed,which is different from the existing scheme in location information acquisition and user access control rights.Then it describes the various phases of the protocol,including initialization phase,key space generation phase,permutation of security subsystem phase,iteration and sharing phase.When location information is updated,the reusability of multi-dimensional key space is presented.Finally,the process of adding and authorizing new users in the scheme is explained.(3)In this paper,it compares the proposed protocol with the schemes in terms of security,overhead and time complexity.The security analysis is mainly about the defense capability of common attack means,the overhead analysis includes storage and communication.The time complexity is compared under theoretical conditions.Finally,the efficiency of this protocol and the existing schemes are compared through experiments.The result shows security and efficiency of the proposed scheme are improved to a certain extent.