{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied in the field of digital identity authentication?","a":"Public key and private key mechanism: Digital identity authentication technology based on blockchain uses public keys and private keys for identity verification. When users need to verify their identity, they only need to use their private key to  sign, and verification personnel use the user's public key for verification, thus achieving"}]}],"pr":"9bb22a0829653259b00c84ed355ce636976b5247e504afe6e9544c15e48e043a"}