Research On Privacy Protection Technology For Blockchain Supply Chain Finance

At present,the supply chain financial system is undergoing a series of technological changes with the development of blockchain technology.Through the decentralization of the blockchain,the supply chain financial system is gradually transitioning from the original centralization to the decentralization to reduce costs and provide transparency in the supply chain.However,the privacy security of blockchain supply chain has become one of the bottlenecks hindering the development of blockchain supply chain finance.There are few privacy protection technical solutions in the existing blockchain supply chain finance,and there are problems with the feasibility of technical solutions.This article mainly focuses on the following researches on privacy protection in the field of blockchain supply chain finance.In order to solve the problem that it is difficult for supply chain companies to change their privacy policies on the blockchain,it is easy for attackers to decipher and intercept private information on the chain.This paper proposes a privacy configurable technology based on smart contracts.The privacy configurator model is designed in combination with the Coinjoin privacy mechanism,the private information of the supply chain company is fragmented through privacy,the gas mechanism is used to prevent the consumption of malicious nodes,and the alliance chain architecture is integrated to form the overall plan design of PKC.After the technical solution met the privacy protection requirements,combined with the Inner Mongolia Outer Comprehensive Service Supply Chain Financial Service Project,the solution was implemented and designed,and comparative experiments in terms of time and CPU energy consumption were designed to prove the feasibility of the technical solution.In supply chain finance,some messages issued by companies on the chain need to be verified by other companies outside the chain.However,companies in the supply chain do not want to verify that the company knows their company's identity information.Based on this,facing a typical ring signature scenario,a ring signature based on the ECC discrete logarithm difficulty problem is designed,and it is integrated with the alliance chain architecture to form an unconditionally anonymous blockchain supply chain financial technology,and the SM national secret is used to carry out this achieve.After discussing the correctness,anonymity and unforgeability characteristics of the specific ring signature,the efficiency of this technical solution is compared with other technical solutions.In the designed experimental simulation,the signature and verification process is completed,which meets the actual needs of the final supply chain financial system.