Research And Application Of Decentralized Data Sharing And Usage Control Technology For The Internet Of Things

With the rapid development of communication technology,the value of IoT(Internet of Things)data has become increasingly significant,and IoT applications have emerged one after another.However,the traditional way of managing IoT data is fragile.Once the collected data is attacked or tampered with,these unreliable and misleading data can have serious consequences.At the same time,it is critical to facilitate data sharing without compromising data sovereignty and privacy.Protecting data is not just about restricting who can access what resources,it is necessary to control how data is handled,which is what usage controls are for.In order to solve the problem of trust and security in IoT data management,this paper researches and implements the decentralized data sharing and usage control technology for IoT and its application.The main contents of the paper are as follows:First,a decentralized data sharing and usage control model architecture for IoT is proposed and designed.Analyzed the overall demand for decentralized data sharing and usage control,researched and designed the decentralized data sharing and usage control security trust model and layered system architecture.On the basis of the model architecture,research and put forward the key technologies of decentralized data sharing and usage control;Second,research and design the key technologies and key algorithms for decentralized data sharing and usage control for IoT.This paper proposes a decentralized data protection model based on proxy re-encryption,and combines IPFS technology to realize data security sharing.This paper proposes a decentralized data usage control model based on blockchain,and realizes automatic and dynamic determination of data usage strategies through smart contracts.Propose a decentralized data sharing incentive mechanism based on blockchain,encourage users to actively share data content,and promote the flow of IoT data;Thirdly,a decentralized data sharing and usage control system for IoT is designed and implemented.The blockchain network is constructed by the double-chain mode of the data management chain and the data consumption chain,and the distributed data sharing and use control system is realized by combining the key technologies of decentralized data sharing and use control,and a good interactive interface is designed and developed to realize the decentralized data sharing and usage control functions.Finally,the system function and performance are evaluated.The evaluation shows that the decentralized data sharing and usage control technology for the Internet of Things proposed in this paper has good feasibility,security,scalability and efficiency.