Design And Implementation Of Internet Of Things Data Sharing System Based On Cross-Blockchain Technology

In recent years,with the rapid development of information technology industry,Internet of Things technology(IoT)is widely used in all aspects of our lives.However,the traditional centralized management mechanism of IoT data management system has some defects in life cycle cost control and revenue,as well as security and reliability.As a decentralized architecture,blockchain brings the value of data credibility from the perspective of technology.The combination of its distributed network structure and the IoT can subvert the traditional centralized architecture of the IoT and eliminate the hidden dangers of single point of failure.The decentralized architecture of blockchain brings many advantages such as tamperproof,security,credibility and traceable,etc.,but the isolation of blockchain network makes it unable to realize information exchange,which affects the IoT running on different blockchain networks.Different IoT domains depend on a variety of heterogeneous blockchain platforms,and only by connecting heterogeneous IoT platforms can the value of the combination of blockchain and IoT be brought into play.Based on the existing blockchain technology,this paper studies the cross-blockchain communication between heterogeneous blockchains,designs and implements a set of IoT data sharing system based on cross-blockchain technology.This paper first analyzes the existing problems and cross-blockchain interaction process in current blockchain system,and proposes a new multi-blockchain architecture supporting cross-blockchain communication.By building relay nodes for blockchain network,the specific blockchain information format is transformed into a general interaction format,and a coordination network composed of coordination nodes is built between multiple blockchains,so as to achieve inter-blockchain communication..Secondly,a cross-blockchain communication protocol is designed to ensure cross-blockchain interaction security and global consistency in multi-blockchain scenarios.Based on the Multi-Blockchain architecture and cross-blockchain communication protocol,we design and implement the IoT data sharing system.This system includes data collection of IoT devices and uploading to the blockchain network,accessing the IoT data from another heterogeneous blockchain network,and providing a graphical interface to display the blockchain status.Finally,the function test of the IoT data sharing system based on the cross-blockchain technology proves the credibility of the system design and the effectiveness of the cross-blockchain scheme.