Crowd sensing dual privacy protection method based on block chain

Abstract

The invention discloses a crowd sensing dual privacy protection method based on a block chain. The method comprises the steps that a task publishing center publishes a sensing task and sends a messagerelated to the task to a block chain network; the block chain network generates a perception task notification through the smart contract and broadcasts the perception task notification to all workers; the workers execute the sensing task and upload the sensing data to the block chain network; the nodes in the block chain network compete for the accounting right by using a consensus algorithm, the miner obtaining the accounting right verifies the quality of the perception data, quantifies the rewards according to the contribution degree, and then generates a final block; and when the final block is recorded on the block chain, rewards are also allocated to corresponding workers and miners, and the like. The method has the advantages that consensus is achieved through the contribution degree consensus algorithm, the shared block chain is used for storing records, on one hand, transparent records are provided, convenience is brought to auditing, and meanwhile malicious attack behaviorsof lawbreakers on the shared network can be prevented.

Description

technical field [0001] The invention belongs to the technical field of data privacy protection, and in particular relates to a blockchain-based crowd sensing double privacy protection method. Background technique [0002] As a new data collection and information service model, crowd sensing (CS) can meet the complex needs of society, geography, environment and many other fields, so it has attracted more and more attention. In the traditional CS, there are problems such as insufficient number of users and poor data quality. Therefore, an incentive mechanism oriented to group intelligence has emerged, which not only improves the enthusiasm of users to participate, but also solves the problem of insufficient number of task participants and perceived data quality to a certain extent. Bad question. However, corresponding privacy issues have emerged in the entire task cycle of the CS system, generally including: centralization risk, identity privacy, and data privacy. [0003] M...

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Problems solved by technology

[0007] In order to solve the above problems, the purpose of the present invention is to provide a blockchain-based crowd sensing dual privacy protection mechanism to alleviate the high operation and maintenance costs and complex system design of data privacy protection in the CS system existing in the prior art , strong correlation between real identity and virtual identity, and dishonest nodes doing evil, leading to technical problems such as system paralysis

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