Research On Trusted Data Sharing Mechanism Based On Alliance Blockchain

The development of emerging technologies such as cloud computing,big data,artificial intelligence,and 5G has prompted a large number of smart devices to be connected to the Internet of Things.The amount of data generated by these devices is showing an exponential growth trend.An era that focuses on data value and data sharing is emerging Come quietly.However,the lack of trust among the various nodes of the Internet of Things makes it difficult to establish a reliable data collaboration mechanism,which leads to the formation of massive data islands among various nodes and departments,making it difficult for data to be shared and utilized.At the same time,Io T devices have their own limitations in terms of computing,storage,and bandwidth,which also hinders the sharing and utilization of data to a certain extent,making its potential economic value unable to be fully realized.In order to effectively utilize the data generated by Io T devices,tap the potential value of data,break down the data barriers existing between the various links of the Io T,and realize data interconnection,a safe and reliable data sharing mechanism is needed.For this reason,this thesis will conduct research on Io T data sharing based on blockchain technology.The specific research contents are as follows:(1)At present,due to the lack of transparent,open and equal interactive environment for data sharing,which leads to the trust problem of data sharing,a fine-grained access control scheme for Io T data sharing based on blockchain is proposed.This solution realizes the regulatory authentication of the data source before the event,the fine-grained access control of the data during the event,and the tracking of malicious users after the event.The scheme first uses symmetric encryption technology to encrypt data to improve computing efficiency,and secondly uses ciphertext policy attribute-based encryption technology to encrypt symmetric secret keys to realize one-to-many user data sharing and greatly reduce the number of repetitions of user data encryption,reducing computational overhead.The data owner uploads the ciphertext to the cloud server,and the data user must have the token generated by the blockchain to interact with the cloud to obtain the corresponding information.(2)The Internet of Things data contains the user’s private information,which reduces the willingness of the data owner to share the data.In addition,the quality of the shared data cannot be guaranteed,and the data sharing or transaction mechanism lacks trust guarantee.This thesis proposes a blockchain-based Internet of Things data Shared reward and punishment mechanism scheme.The scheme designs a fund management contract,a user comprehensive reputation evaluation contract,and an attribute identity contract.Through the three smart contracts,the malicious behavior of Io T devices or users is reduced,and the efficiency of data sharing is improved.Disputes are resolved in two rounds.If the on-chain arbitration is not satisfactory,offline arbitration can also be used for final resolution.By analyzing the behavior of data participants through game theory,arbitration should be run rarely in the long run,which ensures the long-term operational efficiency of the proposed Io T data sharing scheme.