{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to implement non-transaction information signatures in blockchain?","a":"Key generation: First, the user needs to generate a pair of public key and private key. The public key is used to encrypt data, and the private key is used to decrypt data and sign. In the blockchain network, the public key  is usually published in the user's account information so that other users can access it when needed."}]}],"pr":"9c197eb45e0280c28f906639efc7932d206361894de5feafcb99d453ae124c00"}