The Cross-chain Mechanism Of Blockchain Based On Notary Group

Blockchain is a technology that is jointly maintained by all members,and that cryptography is used to ensure the security of message delivery and data access.Blockchain technology was only applied to virtual electronic currencies such as Bitcoin in the early days.However,driven by the market,today's blockchain technology has begun to penetrate into many fields such as finance,medical care,supply chain and intelligent transportation.Because of the isolation between different blockchains,cross-chain technology is needed to realize the value circulation between different chains.Based on the notary group and margin pool,the thesis studies and implements cross-chain transactions of different blockchains.In particular,the following tasks have been completed:First,in order to solve the problems of the notary's credibility and centralization in the traditional notary mechanism,a cross-chain mechanism based on the notary group is proposed.This mechanism builds a cross-chain model based on the notary group and proposes a two-phase cross-chain agreement to achieve cross-chain value circulation.In addition,in order to ensure the security of cross-chain transactions,the thesis not only uses the margin pool to limit the malicious behavior of notaries,but also formulates related incentives to encourage other notaries to monitor cross-chain transactions.Secondly,in order to ensure that the rights and interests of all notaries are relatively balanced,the enthusiasm of notaries to participate in cross-chain transactions is increased,a cross-chain mechanism of notary group based on R-P(Reputation-Profit)is proposed.On the basis of the cross-chain mechanism based on the notary group,a notary group election model,a real notary's profit model and a reputation model are constructed.This ensures that the income of notary group members will not be polarized,and at the same time,the enthusiasm of notaries to participate in cross-chain transactions is also guaranteed.In addition,for transactions whose transaction money is less than the balance of the margin pool account,the margin pool is directly responsible for the "middleman",which can reduce the number of intra-chain transfers within the blockchain and reduce the time of cross-chain transactions.Finally,the thesis builds the Ethereum private chain and notary group platform.The experimental platform is used to verify and analyze the performance of thecross-chain mechanism,the influence of malicious nodes and the incentive mechanism of the notary group.The results show that the cross-chain mechanism based on the notary group can ensure the transactionality of cross-chain transaction data on the premise of ensuring the efficiency of cross-chain transactions;The cross-chain mechanism of notary group based on R-P can also reduce the average time of cross-chain transactions on the premise of ensuring the transactionality of cross-chain transactions.The research work shows that the cross-chain mechanism based on the notary group can effectively realize the interconnection of different blockchains,and ensure the atomicity and integrity of cross-chain transactions,which has important practical significance.