{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the roles of private keys and public keys in blockchain?","a":"Encryption and Decryption: The public key and private key are a pair of keys with mathematical relevance. The public key is used for encrypting data, while the private key is used for decrypting the corresponding data. Compared to symmetric encryption (such as usernames and passwords), asymmetric encryption is more secure because it avoids the  risk of key leakage during transmission."}]}],"pr":"7ddf9770b63a01f3eb190259aa8163dd251a32b2597c488825f4a372546b952a"}