Research on Modify Protection of Metrology Electronic Certificate Based on Blockchain Technology

The metrological verification certificate is an important basis for the metrology instrument to be verified by the statutory verification agency. The verification result affects whether the measuring instrument can be used normally again. With the development of computer network technology, electric certification has been widely promoted and applied due to its low cost and easy to check characteristics. The authenticity of electric certification is the basis of practical application, how to ensure its uniqueness, integrity and Non-destructible metrology will have a significant impact on metrological verification. Blockchain technology uses a decentralized distributed network structure. Once the data information is added to the main chain through hash algorithm, Merkle tree structure, asymmetric key encryption technology and consensus mechanism verification, it will he saved and cannot he Make malicious modifying or deletion. On the basis of summarizing the blockchain anti-modifying technology, the article applies the principle and method of blockchain related technology to the feasibility of measuring electric certification to meet the requirements of ensuring the uniqueness and authenticity of electric certification.