Research On Blockchain Cross-chain Identity Authentication Technology Based On Supply Chain Finance

Supply chain finance is an emerging technology produced with the development and expansion of supply chain,which integrates the relevant theoretical knowledge of supply chain management and finance to solve the financing difficulties faced by supply chain enterprises.At present,with the rapid development of blockchain technology,it has the characteristics of decentralization,immutable and traceable in the whole process,so that many industries can be combined with it to achieve the purpose of reliable data and reduce disputes.Blockchain technology refers to the record of transaction information into the blocks connected in chronological order,the use of cryptography technology to protect the integrity of the transaction record,and all the data on the block can be open and transparent,each node can access and verify the authenticity of the data.In this way,the blockchain can become a distributed ledger,effectively and persistently recording the transactions of any party in an open network.Due to the advantages of blockchain,such as trust reduction,open autonomy,etc.,it has shown great application prospects since its birth.But in practice,it will be found that there are multiple blockchain systems,and they are independent of each other.Therefore,when information is exchanged and value is circulated in different blockchains,cross-chain operations between blockchains are inevitable.Cross-chain technology is an important means to improve the scalability and interoperability of blockchain.However,during cross-chain operation,there are many security problems that cannot be ignored,such as information leakage,security level reduction,distributed denial of service attack after cross-domain.Identity authentication technology is an efficient and fast method to determine the validity of user identity,which can ensure the binding relationship between users and their digital identities.Authentication technology is considered as the main security guarantee method in network and information security,and plays a key role.However,in the encryption technology of the existing identity authentication mechanism,the authentication of the system must rely on the key generation center,certificate issuing authority and other reliable third parties.This centralized authentication method brings a series of security risks,such as unreliable third-party certification authority authentication,single point failure,database data leakage and so on.Similarly,in the process of blockchain cross-chain operation,data interaction will also face many security problems.Due to the unique nature of blockchain technology,traditional identity authentication mechanisms,such as certificate-based public key infrastructure and identity-based cryptography,cannot be properly applied in the blockchain system.Therefore,new distributed identity authentication technologies need to be used to meet the needs of decentralized application scenarios.Aiming at the above problems,the main research contents of this paper are as follows:1.Based on the research of supply chain finance and blockchain technology,this paper summarizes and puts forward the security problems faced in the cross-chain process of blockchain.At the same time,the existing cross-chain forms and several main crosschain methods are analyzed and summarized,and the current mainstream cross-chain solutions are introduced.2.Applying the identification-based identity authentication mechanism CFL to blockchain cross-chain,this method can effectively solve the problems of information leakage,man-in-the-middle attack and distributed denial of service attack faced by crosschain operation.Finally,the safety and effectiveness of the proposed algorithm are analyzed and tested,and the results show that the proposed method is feasible.