Research On Location Privacy Protection Model Based On Matrix Transformation Method

With the development of wireless global positioning system,location-based service(LBS)is also moving towards the public life.With the development of technology,the meaning of location service is constantly enriched.Nowadays,people can enjoy the convenient location service as long as they take out the mobile equipment and wearable equipment in their pockets.With the advent of the big data era,driven by interests,many people want to obtain user related data,location data is also one of them.As privacy data,many users do not want their location privacy to be leaked,thus resulting in a large number of location privacy protection models.Currently,location privacy protection can be divided into three categories: anonymous location privacy protection,interference based location privacy protection,and encryption based location privacy protection model.At present,there are many researches on the location privacy protection model for the server,but there is little research on the data transmission.In the course of LBS services,data plaintext transmission is the main factor of location privacy disclosure.To solve the problem of location privacy disclosure in network transmission,a position privacy protection model based on matrix transformation is proposed.The research content of this paper has three points:1.the theoretical results of the current position privacy protection model.By reading a large number of relevant literature,we can understand the attack means and protection measures in the field of location privacy protection.Understand the applicable scenarios of each kind of protection model,the research results and advantages and disadvantages of each method.It is pointed out that the current three models are credible on the server side,and the scene where the security requirements of the network transmission are higher can not fully meet the requirements.In this context,this paper proposes a privacy protection model for the location of this article.2.establish and improve the location privacy protection model based on matrix transformation method.First of all,starting from the basic mathematical theory,according to the mathematical conclusions derived,and practical problems,the mathematical theory is applied to practical problems.Mapping the coordinates of the earth to another space is the core idea of the matrix transformation method,and the irreversibility of the transformation matrix is the basis of the security of the matrix transformation model.From the mathematical basis to build the model also need to complete the numerical data of the latitude and longitude,and also discussed the matrix transform method of data flow and system architecture,security proof,and other aspects of the model based on content.3.experimental verification section.Firstly,some key technical points of the code or solution,how to solve the problem of the program to produce a large number of matrix libraries,lists several client and server matrix correspondence,recommended matrix library Jama.In the experimental part,the matrix transformation method is compared with other methods,and the time consumption and the space consumption are discussed in detail in two cases: the server is trusted and the server is untrusted.When the server is credible,the matrix transformation method is less time-consuming and less expensive than the classical encryption method.In the server the untrusted case,matrix transformation method can be combined with other methods,the protection of location data in the network transmission and server security at the same time,the program does not significantly increase the time consumption and space consumption.