{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology achieve joint authentication?","a":"User registration: When a user registers on a blockchain platform, the system generates a unique identity identifier for them, usually a private key composed of  a string of characters. This private key will serve as the user's identity credential on the blockchain."}]}],"pr":"6034d4c5fbf2de777066037eddc7d79d9315f43bf684fe808c18a96e29742848"}