Data privacy protection aggregation method under secondary network of smart power grid based on block chain

Abstract

The invention discloses a data privacy protection aggregation method under a secondary network without a trusted third party in a smart power grid based on a block chain. According to the method, data aggregation under the secondary network without a trusted third party is realized by utilizing the Hough rule and the ElGamal cryptographic algorithm, so that the trusted third party does not need to be introduced into the intelligent power grid system, and the risk of privacy disclosure when the trusted third party is not trusted is avoided. Meanwhile, the Hough parameters are embedded into the first-level aggregation ciphertext of each first-level fog node to achieve data aggregation under the second-level network, stronger privacy protection is achieved, large-scale users are supported, and calculation overhead is reduced. In addition, a transaction relationship between the user and the electric power company is established through the smart contract, and the transaction relationship between the user and the electric power company is written into the block chain. The method has the advantages of good expandability and small calculation overhead, and is suitable for a large-scale smart power grid.

Description

technical field [0001] The invention belongs to the fields of information security technology and smart grid technology, and relates to a privacy protection data aggregation method based on a block chain that does not require a trusted third party and supports secondary aggregation. Background technique [0002] Smart grid has become a new strategy to solve global energy problems in the 21st century. It combines traditional grid with modern information technology to make the entire grid system more compatible, controllable and self-healing. However, although the smart grid is booming, it still faces some challenges in terms of data aggregation and privacy security. [0003] The data aggregation scheme under the traditional first-level gateway model has a single aggregation granularity, is not suitable for real-life applications, and relies on a trusted third party, facing the risk of privacy leakage, which may infringe the user's privacy. The introduction will bring additio...

AI Technical Summary

Problems solved by technology

However, although the smart grid is booming, it still faces some challenges in terms of data aggregation and privacy security

[0003] The data aggregation scheme under the traditional first-level gateway model has a single aggregation granularity, is not suitable for real-life applications, and relies on a trusted third party, facing the risk of privacy leakage, which may infringe the user's privacy. The introduction will bring additional expenses, and it will bring a lot of inconvenience when the number of users is large

In addition, the user's electricity bill is easily tampered with, which reduces the credibility between the user and the power company

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