One Method for Implementing Privacy Protection of Electronic Invoices Based on Blockchain

In view of the fact that the blockchain system is essentially a distributed ledger, the data privacy of electronic invoices needs to be protected, and the electronic invoice circulation environment needs security support, we proposed a privacy protection scheme for electronic invoices based on blockchain technology, a block storage scheme based on three-tier storage such as index/element information summary/electronic invoice encrypted data, and a fast and secure access model based on three-tier storage scheme, which solves the conflict between the openness of blockchain technology and the confidentiality of electronic invoices. Firstly, starting from the background and related knowledge of blockchain technology, we analyzed and studied the availability of blockchain technology on electronic invoices, and analyze the security threats and security requirements of the chain on electronic invoices, On this basis, we designed an electronic invoice system model based on blockchain technology, researched the block storage model and data access logical structure of electronic invoices, and gave the relevant implementation scheme and some pseudo code. Secondly, we analyzed the application scenarios and security of electronic invoices based on blockchain technology; Finally, according to the analysis results of the system, the security, excellence and feasibility of the scheme are proved.