Research And Implementation Of Data Security Sharing Model And Key Mechanism Of Internet Of Things Based On Blockchain

With the continuous development of Internet of things technology,Internet of things technology has been widely used in various fields of life,so the demand of Internet of things data sharing also appears.Although the current research on the data sharing model of the Internet of things is increasing,and some data protection schemes are proposed for the data of the Internet of things,there are still some complete and credible data protection schemes for the data of the Internet of things in the whole data sharing process.At present,the data sharing system of the Internet of things basically adopts the centralized sharing mode,which brings a single point of failure crisis and makes the data availability hidden danger.When users share data,they need to rely on the central organization to provide services,which also brings data trust crisis,such as the central organization may tamper with data.The confidentiality and integrity of user data are still under threat.With its distributed,open,transparent,trusted and tamper proof characteristics,blockchain provides a kind of safe and reliable technical support for solving the data security problems existing in data sharing,and provides a reliable underlying service for realizing the distributed data security sharing system.In this regard,this paper will study the data security sharing model and key mechanism of the Internet of things based on the blockchain.The specific research contents are as follows:First,research on the data security sharing model of Internet of things based on blockchain.In view of the problems of single point of failure,data privacy disclosure,opaque internal operation of the system and expensive third-party service fees existing in the existing centralized mechanism of data sharing of the Internet of things,a data security sharing model of the Internet of things based on blockchain is proposed,and the architecture of the model is studied in layers.This model takes the distributed blockchain network as the core,provides data security protection capability and builds decentralized and trusted data security sharing service on the basis of satisfying the data sharing of the Internet of things.Second,research on the key mechanism of data security protection of Internet of things based on blockchain.There is an important demand for data security in data sharing of the Internet of things.In this paper,we propose data confidentiality protection mechanism based on proxy re encryption technology,data control mechanism based on access control method and data integrity verification mechanism based on digital digest.The research of the above key mechanisms provides the Internet of things data with safe and reliable protection ability,and also provides users with finegrained data rights management ability.Third,the design and implementation of the prototype system of Internet of things data security sharing based on blockchain.Based on the above model and key mechanism of data security sharing of the Internet of things,the prototype system of data security sharing of the Internet of things is implemented by using Ethereum,IPFs and web technology,including four modules of account management,data management,authority management and audit management.Finally,the function verification and performance test are carried out in the actual application scenario.The running results show that the system can meet the requirements of data security sharing of the Internet of things.