Research On Data Security Of Ubiquitous Power Internet Of Things Based On Blockchain

With the development of smart grids and the concept of Ubiquitous Power Internet of Things(UP-IoT),the devices have realized information interconnection.The rapidly increasing amount of data has brought a heavy burden to the network.Traditional centralized cloud management methods consume a lot of network infrastructure and cloud infrastructure resources,affecting the execution of key tasks of the Power Internet of Things.For delay-sensitive data,the data management can choose to be closer to the edge of the grid of smart terminal equipment.Edge computing introduces a middle layer edge,the edge device will lose control of the raw data and face some new security and privacy issues.Therefore,studying the data security of the edge devices of the UP-IoT has practical significance for the safe and stable operation of the power grid.The thesis focuses on the storage security and computing security of grid edge data.The smart terminal equipment of the power grid is scattered,and there are many scattered and heterogeneous data resources.Consider using blockchain technology to study a decentralized and credible data storage and computation method.The specific work of the thesis is as follows:1.Researched the UP-IoT framework and proposed a blockchain-based data security model for its "cloud-side-end" network architecture.This model can effectively adapt to the large amount of "side" and "end" data and computing.The task-heavy feature shifts part of the storage and computing tasks of delay-sensitive data to the "edge" close to the data source,reducing the cloud center burden.2.Aiming at the problem of secure storage of data at the edge of the grid network,a trusted edge storage scheme based on blockchain is studied.Using blockchain technology,a combination of on-chain and off-chain storage is used to achieve safe data storage.To effectively integrate and utilize edge servers’ storage resources,a resource allocation algorithm is designed to allocate edge server resources effectively.The experimental results showed the feasibility and effectiveness of the proposed scheme.3.Given the problem of secure computing of edge data in the grid network,consider the use of blockchain and secure multi-party computing(MPC)technology to realize joint confidential computing between data sets.This scheme allowed edge devices to outsource their encrypted data to edge servers and use the MPC method to analyze and compute edge data.It can realize the direct use of ciphertext to perform data processing and security computations.Finally.security analysis and experimental result analysis are carried out.which proves theoretically and experimentally that the decentralized,secure computation scheme proposed in this paper has better results.