Block chain-based distributed anonymous area cooperative construction method capable of achieving privacy keeping

Abstract

The invention belongs to the technical field of privacy protection, and discloses a block chain-based distributed anonymous area cooperative construction method capable of achieving privacy keeping. Construction of an anonymous area is regarded as a two-party game between a request user and cooperative users, the two game parties and locations provided by the cooperation users are recorded by a block chain to serve as evidences, the user having location leakage and cheating behaviors is punished to be not capable of constructing the anonymous area when serving as the requester to restrain theself-interest of the user, and then the block chain-based distributed anonymous area cooperative construction method capable of achieving privacy keeping is proposed. According to the method, the condition that the request user leaks location information of the cooperation users can be prevented, the anonymous area can be efficiently generated while the cooperation users are motivated to provide real locations to participate in anonymous area construction, and the location privacy of the users in distributed K anonymity-based LBS querying is effectively protected.

Description

technical field [0001] The invention belongs to the technical field of privacy protection, and in particular relates to a block chain-based collaborative construction method of a distributed anonymous area with privacy preservation. Background technique [0002] Location-Based Service (Location-Based Service, LBS) provides users with value-added services including point of interest query, advertisement push and entertainment games based on the location information provided by users and with the support of geographic information system platform. It has been widely applied to fields such as e-commerce, health care and mobile social networking, and has become an essential part of daily life. According to a new report, there were 220 million LBS users in the United States in 2017, accounting for 68.09% of its total population, and it is expected to increase to 242 million by 2018. With the continuous popularization and wide application of LBS, the leakage of location privacy in...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the existing technology is: the existing distributed K-anonymity privacy protection scheme does not consider the location leakage and location deception in the process of collaborative construction of the anonymous area, so that the self-interested requesting user will leak the cooperation user’s real location, and self-interested collaborative users will also provide false locations, which cannot effectively protect the location privacy of users in LBS queries

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