Mobile user position privacy protection method for avoiding attacks performed through circular region overlapping parts

Abstract

The invention provides a mobile user position privacy protection method for avoiding attacks performed through circular region overlapping parts, and relates to the field of position privacy protection. The method comprises the following steps that: firstly, a user sends a request Q (a current position of the user, the number of query results and the like) to intermediate proxy equipment; the intermediate equipment converts a real position of the user into a circular region, specifies a value which is greater than a confidence level needed by the user and the number of query results, and sends a request Q' to an LBS (Location Based Service) server provider; an LBS finds points of interest satisfying a condition with a query processing method, puts the points of interest satisfying the condition into a set V', and returns the V' to the intermediate equipment; and the intermediate equipment screens the V', and returns a screening result to the user. Through adoption of the method, the attacks performed through the circular region overlapping parts are effectively avoided when the user queries a server, and the position privacy of the user can be protected more accurately. The mobile user position privacy protection method is suitable for protecting privacy of the user position when the user queries surrounding points of interest.

Description

technical field [0001] The invention belongs to the technical field of position privacy protection, and specifically relates to a method for protecting the position privacy of a user when searching for surrounding points of interest through a server. Background technique [0002] Social network refers to a relatively stable relationship system formed by interaction among individual members of society. With the vigorous development of Internet technology, online social network services and applications have become an indispensable part of our lives. Location-based services have been widely used in mobile users. Users can query points of interest around him through servers, but users need to send their accurate locations to obtain services, which may pose a threat to location privacy. Therefore, how to protect the location privacy of users while providing location-based services has become a research hotspot in recent years. [0003] R.Beresford and others proposed the mixed ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that when a mobile user queries the server for surrounding points of interest, since the user terminal needs to continuously send hidden areas to the server and screen the query results, the workload of the user terminal is greatly increased and privacy is easily leaked, thus proposing A method for protecting the location privacy of mobile users that avoids overlapping circle attacks is proposed. The workload of the user end is reduced by using the intermediate device, and the overlapping area attack is processed, which effectively protects the location privacy of the user and reduces the workload of the user end. Burden and improve query results

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