Position privacy protection method based on dynamic pseudonyms

Abstract

The invention discloses a position privacy protection method based on dynamic pseudonyms. The position privacy protection method mainly overcomes the defect that the position privacy protection degree in an existing position pseudonym method based on position services is too low. The position privacy protection method comprises the steps that a communication system composed of users, a credible mechanism and a service provider is built; the system is initialized through the credible mechanism; the users sign in the credible mechanism on line to obtain public and private keys; the credible mechanism updates the pseudonyms and pseudonym certificates of the users regularly; the users use the dynamic pseudonyms to request position services from the service provider; the service provider provides service data for legal users and requests the credible mechanism to revoke malicious users; the legal users obtain the position service data. According to the position privacy protection method, identity anonymity is achieved by using the dynamic pseudonyms, the relation between identity information and spatiotemporal information is cut off, and therefore it is difficult for the service provider to speculate position information of the specific users by means of side information, position privacy of the users is protected effectively, and the position privacy protection method can be used for position privacy protection based on the position services in social networking services.

Description

Technical field: [0001] The invention belongs to the technical field of wireless networks, relates to the protection of location privacy, and can be applied to surrounding query, navigation service and other fields. Background technique: [0002] Social network is a form that reflects social communication groups that naturally develops with the application of the Internet such as Email, BBS, blog, and Weibo. platform. With the popularity of various mobile devices such as smart phones and vehicle-mounted mobile terminals, and the application of sensor network technology, it is becoming more and more popular to use mobile terminal devices to access social networks, and mobile social networks have gradually become mainstream. According to the latest report released by Nielsen in February 2013, more than half of social network users worldwide access social networks through mobile devices such as mobile phones. Among all the applications of mobile social networks, applications ...

AI Technical Summary

Problems solved by technology

However, activities such as meeting, talking, and swiping credit cards in public places may lead to the disclosure of the user’s real identity and location at a specific moment. If the attacker combines these side information with the information obtained from the user’s request for analysis, the user’s The relationship between the long-term pseudonym and real identity may be leaked, so that the long-term pseudonym is useless

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