{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What purposes can public keys in a blockchain be used for?","a":"Encryption and decryption: Public keys can be used to encrypt transaction data to ensure the security of the data during transmission. At the same time, public keys can also be used to decrypt data encrypted by private keys, in order to verify the authenticity and  integrity of transactions."}]}],"pr":"2760da20ebb5167b0197c53dbddfa6fc9b2e29e82855d1365abf705232fc6f84"}