Electronic Data Preservation and Storage of Evidence by Blockchain

In the face of the era of big data,how to ensure the authenticity of electronic data has become an important practical issue.Online preservation methods based on hash operation,time stamp,and blockchain technology can effectively guarantee the authenticity and security of electronic data.Blockchains are inherently traceable,de‑centralized,and difficult to tamper with,which can be enough served as the basic technology of electronic data certification.Preservation by blockchain mainly includes the following links:platform registration and identity authentication,generation and transmission of electronic data,and storage of electronic data.Preservation by blockchain has higher security than centralized online security because of distributed storage.However,it should be acknowledged that the preservation by blockchain is not without risk.The court should adhere to the principle of individual review of each case and review the electronic data from its generation,transmission,reception,storage,and collection.