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Spatial crowdsourcing multistage position privacy protection method based on block chain

A privacy protection and blockchain technology, applied in the field of distributed space crowdsourcing application scenarios, can solve the problem of low security of workers' location information and data, and achieve the effect of improving security and ensuring consistency

Active Publication Date: 2019-12-27
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and propose a block chain-based space crowdsourcing multi-level location privacy protection method, which is used to solve the security of worker position information data in space crowdsourcing existing in the prior art low technical issues

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  • Spatial crowdsourcing multistage position privacy protection method based on block chain
  • Spatial crowdsourcing multistage position privacy protection method based on block chain

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to figure 1 , the present invention comprises the following steps:

[0033] Step 1) Initialize parameters:

[0034] Construct a space crowdsourcing system composed of blockchain BC and N nodes, its structure is as follows figure 2 As shown, in this embodiment, N=7, among which six nodes are workers performing tasks w={w 1 ,w 2 ,...,w 6 ,}, one node is the requester R who issues the task, the activity area of ​​the node with the largest activity range among all nodes is A, A={(x,y)|0≤x≤X,0≤y≤Y}, X and Y represent the maximum value of A on the x-axis and y-axis in the coordinate system;

[0035] Step 2) The requester R submits a task request to the blockchain BC:

[0036] Requester R adds a task identification number ID to the problem description D of the task to be released, and the problem description specifically...

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Abstract

The invention provides a spatial crowdsourcing multistage position privacy protection method based on a block chain, and mainly solves the technical problem of low safety of worker position information data in spatial crowdsourcing in the prior art. The method comprises the following steps: initializing parameters; the requester submits a task request to the block chain; a worker periodically uploads a position record to the block chain; the worker divides the area according to the selected privacy level, and submits the combination of the position coordinate ciphertext and the boundary recordas position information to the blockchain; and the requester verifies the position information submitted by the worker according to the position record on the block chain and the position informationsubmitted by the worker. According to the invention, multi-level privacy protection of worker position information is effectively realized, and the safety of space crowdsourcing is improved.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to a blockchain-based space crowdsourcing multi-level location privacy protection method, which can be applied to distributed space crowdsourcing application scenarios. Background technique [0002] Since Howe first proposed the concept of crowdsourcing in 2006, the technology has been widely used in various fields, such as transportation, logistics and so on. With the improvement of computing and perception capabilities of mobile devices, a form of crowdsourcing based on user location information, spatial crowdsourcing, has emerged. Spatial crowdsourcing is to assign tasks to workers who meet certain spatial constraints. Traditional spatial crowdsourcing is based on centralized management and includes three parties: requesters, workers, and spatial crowdsourcing platforms. Requesters submit task requests and location strategies to the spatial crowdsourcing platform. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/08
CPCH04L63/0407H04L63/0421H04L9/0872H04L9/50
Inventor 张俊伟杨帆马建峰李兴华马卓姜奇杨超王雨晴
Owner XIDIAN UNIV
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