{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the advantages of blockchain technology in digital identity authentication?","a":"Security: Blockchain uses encryption algorithms, such as asymmetric encryption technology, to ensure the security and integrity of the data. Each user has a public key and a private key. The private key is only held by the user himself, and verification personnel use the user's public key to verify the signature, thereby achieving identity authentication."}]}],"pr":"38bfb6f93bc4afe2600b319ffc02b86b224466e3f4bf04e23ff0eca20285fb25"}