Collaborative location privacy protection method based on blockchain

A privacy protection and blockchain technology, applied in the field of collaborative location privacy protection based on blockchain, can solve the problems of user location privacy protection and untrustworthy users, so as to promote user participation, reduce the probability of location privacy leakage, and promote The effect of honest cooperation

Active Publication Date: 2021-11-02
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of user location privacy protection in LBS service, the present invention carries out following research:
The combination of blockchain and collaborative location privacy protection has great potential to solve the problem of untrusted user behavior in real-world environments

Method used

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  • Collaborative location privacy protection method based on blockchain
  • Collaborative location privacy protection method based on blockchain
  • Collaborative location privacy protection method based on blockchain

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Experimental program
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] This solution aims at the problem of privacy leakage caused by group collaboration in the distributed solution, and integrates the game model with blockchain technology. Use the game model to analyze the user behavior in the collaboration group, and set the reputation value according to the user behavior. By recording the forwarding behavior between users as the basis for punishment, restrict user behavior.

[0029] 1 system model

[0030] Table 1: Meaning of main symbols

[0031]

[0032]

[0033] 1.1 User Collaboration Model

[0034] Such asfigure 1 As shown, this scheme adopts group cooperation mode to forward query information, and self-organized communication among mobile users.

[0035] First, the request initiator constructs a cooperation group with surrounding users, and independently calculates the probability forwardi...

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Abstract

The invention discloses a collaborative location privacy protection method based blockchain. Firstly, a reputation mechanism is designed, transaction behaviors are stored through blockchain, and once dishonest behaviors are found, reputation value scores of the dishonest behaviors are reduced; secondly, the safety is analyzed by using a game theory; in addition, during the calculation of the probability forwarding matrix, the utility cost and the service quality of user forwarding and the expected distortion error of an attacker with background knowledge are considered, so the privacy level of the user is improved, and the service quality of the user is ensured; finally, according to the invention, a simulation experiment and security analysis show that the experiment can effectively prevent the self-benefit behavior of the user in the cooperation process, and can also promote the user to actively participate in forwarding. The position privacy protection effect of the user can be improved, and inference attacks are prevented.

Description

technical field [0001] The technical solution belongs to the technical field of network security, and is specifically a blockchain-based collaborative location privacy protection method. Background technique [0002] Location-Based Service (LBS) usually means that users send their own location to Location-Based Service Provider (Location-Based Service Provider, LSP), and LSP provides value-added services according to user query requests, such as users query nearby restaurants, Hospital etc. information. While LBS has brought convenience to people's lives, it has also caused serious user privacy leakage. Through the collection and processing of user location information, malicious entities can infer sensitive information such as the user's personal preferences, living habits, home address, physical condition, etc., threatening the safety of the user's life and property. [1,2] . Therefore, how to ensure user privacy information has become an urgent problem to be solved in L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L29/06H04L29/08
CPCH04L67/1097H04L63/0428H04L9/3247H04L63/0442H04L67/52H04L9/50
Inventor 沈航汪悦王天荆王兴亚白光伟
Owner NANJING UNIV OF TECH
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