Cross-Chain Technology Research Of Blockchain Notary Mechanism Based On Trust Evaluation Model

In the information age,the exchange of information is very important,but in different fields,different blockchain networks can not exchange information and eventually form the situation of an information island.Therefore,in front of the gradual increase of blockchain application projects,the demand for information exchange and value circulation between blockchain networks in various fields is imminent.Based on this background,the research of blockchain cross-chain technology arises at a historic moment.As a mainstream blockchain cross-chain technology,the notary mechanism has the advantages of easy implementation and strong scalability,which can be widely applied in the interaction scenes of different blockchain networks.However,it is difficult to guarantee the reliability of the notary public at present,which limits the application of this technology.As a popular research topic,trust evaluation has been applied to solve various trust problems in the field of computers,so trust evaluation technology can be used to improve the reliability of the notary public.Based on this,this paper conducts indepth research on the notary mechanism and trust evaluation model and completes the following work:(1)Based on the characteristics of the notary mechanism cross-chain Transaction scenario,proposing a Model of Blockchain cross-chain Transaction Trust(MBCTT).By analyzing the characteristics of cross-chain transaction scenarios of notary mechanism and adopting several evaluation indexes to carry out a comprehensive design,the model can evaluate the behavior of notary comprehensively.Experiments show that this model has better evaluation performance than the traditional trust evaluation model.(2)For the problem of notary reliability,this paper combines the trust evaluation model with the notary mechanism cross-chain model,proposing a Model of Notary Mechanism Based on Trust Evaluation Model(MNMTEM).MNMTEM can quantify the behavior of notary nodes through the trust evaluation model,to avoid the malicious notary nodes from participating in transactions many times and improve the reliability of notary nodes.Experiments show that MNMTEM can select highly trusted notary nodes to participate in the transaction,and has better cross-chain transaction performance than the notary mechanism cross-chain model before optimization.(3)For the centralization of notary elections,propose a notary election algorithm based on DQN(Deep Q Network).According to the notary mechanism cross-chain transaction scenario algorithm modeling and process design,to balance the performance requirements of the cross-chain transaction and the fairness of notary election.Experiments show that compared with MNMTEM’s notary election algorithm,this algorithm can not only ensure certain cross-chain transaction performance,but also ensure the fairness of notary election,and avoid the problem of centralization of notary election in the cross-chain system.