Research On Cross-chain Data Integration Technology Based On Trust Computing

Since the birth of block chain technology,the trend of its development has been ups and downs.From the beginning,no one is optimistic about then bubble growth until now it has gradually returned to rationality.Based on the application of the technology,it is no longer confined to the financial field.A large number of block chain projects adapted to the needs of different scenarios are also designed.The application scope has been extended to the whole society,but it is restricted by some factors.The current blockchain projects can not be well implemented in commercial applications,and network isolation is the most important point to limit the development of blockchain.The current blockchain projects are designed and developed by different technology R &D teams based on different concepts and needs,using different technical architectures,which forms a lot of P2 P networks that can not be interconnected,just like isolated islands of information and can not cooperat e,which limits the play space of blockchain to a great extent.Cross chain technology is an important technical means to realize the interconnection between chains.It makes the value Internet become a reality.It is a communication protocol from one chai n to another,and is the core and key technology in the era of blockchain 3.0.At pre sent,cross chain mechanism mainly includes hash locking,side chain,notary mechanism and communication protocol cluster.But they all have their own disadvantages.The n otary mechanism introduces the risk of centralization of the third party organization;Hash locking can cause malicious attackers to create a large number of transactions for Do S attack and block the network;The side chain depends on the honesty of the miners.In addition,these technologies only focus on the cross chain transfer of assets,and the application scenarios are limited.this paper proposes a data consolidation mechanism based on the trust degree of blockchain nodes: firstly,the blockchain net work that initiated the consolidation randomly selects several nodes as the review commit tee to join the blockchain network that provides the data source,then the review committee evaluates the credibility of the chain according to the model,and finally,if the credibility is higher than the threshold,it carries out data integration.The main research contents of this paper are as follow s:(1)This paper proposes a credibility evaluation model of blockchain P2 P network.Firstly,according to the performa nce of nodes in a cycle,the credibility of each node in the blockchain network is calculated by usin g the node credibility evaluation model,and then the current credibility of the blockchain network is obtained by using the community credibility evaluati on model to synthesize the credibility of all nodes in the blockchain network and the cross chain historical interaction quality.At the same time,in ord er to improve the accuracy and time efficiency of cross chain data integration,this paper defines four trust levels based on cross chain interaction times and interaction quality,and adopts different e valuation and consolidation schemes for different levels.(2)This paper proposes a method of data integration across blockchain,which combines the above trust model with Ethereum and smart contract,divides the whole architecture into application layer,blockchain server layer,contract interface layer and block data layer,and uses RPC remote call geth open interface to realize credibility evaluation and data integration.(3)This paper implements the enterprise level DNS Cross organization domain name access scheme.Based on the enterprise level DNS Security Architecture Based on blockchain technology,the experiment is carried out,and the above cross chain scheme is applied to solve the scene of the merger of two domain name chains,so as to adapt to t he merger of companies and Cross organization domain name access.The experiment proves the feasibility and efficiency of the scheme.