Design And Implementation Of Financial Collateral Management Platform Based On Blockchain Technology

With the rapid development of technology,many industries are transforming in the direction of digitalization.Therefore,mortgage loans in the financial sector are facing the issue of digital management upgrades.Most of the traditional mortgage platforms use a centralized way to store data,which is easy to leak and difficult to share.For users,the business process is complex,and the disclosure of privacy information is worried about.The characteristics of blockchain technology include distributed,not easy to tamper-resistant and traceability and so on.In this thesis,after in-depth analysis and research on the characteristics of the financial loan system,this technology is introduced into the traditional system platform to form an alliance chain.There is no central organization in the alliance chain,and the nodes on each chain can manage the account books,which solves the malpractice of a system centrally controlling all nodes in the traditional mortgage loan platform.The transaction process is written into the ledger after endorsement verification,which can effectively prevent data tampering and achieve data sharing.The main research work of this thesis is as follows:1.The Hyperledger Fabric blockchain network is built,and the cryptographic algorithm of the underlying blockchain of Fabric is improved.By analyzing the interaction logic among components and the calling scenario of cryptographic algorithms in Fabric platform,the international cryptographic algorithms in BCCSP and other modules of Fabric platform are adjusted so that the national cryptographic algorithms of SM2,SM3 and SM4 can support the normal operation of Fabric platform.2.The financial mortgage management platform is designed.In order to carry on the requirement analysis,architecture design,core module design and Web application deployment for the implementation of the system.The system is developed by Springboot+MVC+Mybatis framework,uses Fabric-SDK-Java tools to achieve application access to resources in the block chain network.And the system completes the interaction between the underlying block chain network and the platform business layer with the combination of traditional platform and block chain technology.3.The user chaincode in the Smart contract is written for the functional module of the business layer.The system chaincode is deployed to realize the operation of the account data.The visualization of the network is realized by calling the interface of the upper application.The correctness and effectiveness of the Fabric cipher improvement is verified,and the performance with the Fabric platform before the transformation is compared and analyzed.