Internet of Things data sharing system and method based on oracle machine and block chain

Abstract

The invention discloses an internet of things data sharing system and method based on an oracle machine and a block chain, the block chain and the distributed oracle machine are utilized to construct the internet of things data sharing system, and an internet of things key data sharing platform with on-chain and off-chain cooperative work is designed and realized. According to the method, Ethereum is adopted as a basic platform, homomorphic encryption is carried out on uploaded data, an intelligent contract is called, a decentralized oracle machine Chainlink is adopted as middleware for data transmission and chaining, calling of the contract on the chain is completed by adopting a web.js library, encryption of key data of the Internet of Things is realized by utilizing Paillier homomorphic encryption, and sharing of the key data of the Internet of Things is realized. According to the method, the problem of data calling in on-chain and off-chain data collaboration is solved by utilizing the oracle machine technology, and the decentralized oracle machine architecture can well improve the reliability of the data, so that the data use and sharing are safer.

Description

technical field [0001] The present invention relates to the technical field of data sharing, in particular to a data sharing system and method for the Internet of Things based on an oracle and a block chain. Background technique [0002] As the "Internet of Things" is clearly positioned as an important part of my country's new infrastructure, its "connected things" nature makes "Internet of Things data sharing" an important factor in determining the development of the Internet of Things. Since the IoT data collected by IoT data sensors has the characteristics of "massiveness", "timeliness", "relevance", and "security", how to share IoT data in a timely, safe and convenient manner has become a concern question. [0003] At present, the traditional way of sharing IoT data based on the Internet is widely used in the industry. In the traditional Internet data sharing architecture, in the "information collection layer" and "network layer", the IoT data sensor is used to collect...

AI Technical Summary

Problems solved by technology

In China, the "archive data protection and sharing method" proposed by Tan Haibo et al. uses the "IPFS file system" to store archive data, and "smart contracts" carry out identity management. rounds of data interaction, the operation steps are complicated, and the performance is not ideal; Xu Wenyu and others proposed a scheme of "providing data to insurance companies based on blockchain and homomorphic encryption while protecting patients' privacy", and fixed the application scenarios to the insured diseases As well as the measures for recording disease types, the application scenarios are relatively limited, and the process of off-chain data storage and on-chain has not been clarified in detail; in foreign countries, Azaria and others first proposed a data sharing architecture using blockchain, but it is only vague theoretical conception

Most of the blockchain-based data sharing schemes are in a theoretical framework, with insufficient consideration of performance and technical feasibility, and it is difficult to apply to the sharing of IoT data

Images