As a distributed ledger technology, blockchain can record the relevant information of evidence in blocks on the chain, and ensure the security and credibility of data through encryption algorithm and * * * identification mechanism. In this way, anyone can verify the authenticity of the evidence through the data in the blockchain, and once the data is recorded in the blockchain, it cannot be tampered with or deleted, thus ensuring the reliability of the evidence.
Blockchain evidence preservation can be applied to various fields, such as legal evidence, intellectual property protection, traceability and compliance.