{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the validity of Evidence during its processing?","a":"Cryptographic protection: Blockchain uses encryption algorithms (such as SHA-256) to encrypt and verify data, ensuring the security and integrity of the data. Only users with private keys can verify  and add data, preventing illegal tampering."}]}],"pr":"d02d0bfd25abf39fd6e48f58d2820f8cbcc03b917181f057de197cee3ae2ab03"}