{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of key pairs in a blockchain?","a":"Encryption and Decryption: The public key and private key in a key pair have the functions of encrypting and decrypting data. The public key can be used to encrypt data, and only users who possess a matching  private key can decrypt it; the private key is used to decrypt data, and only users who possess the private key can decrypt data encrypted with the public key."}]}],"pr":"2efbec8998cd2b1ae5b6fb118a0ddfc333e5574abe782417514f3e1125125eda"}