{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What role do cryptographic methods play in ensuring security in blockchain?","a":"Data encryption: Through encryption algorithms such as symmetric encryption and asymmetric encryption, sensitive  data and transaction information in blockchain are encrypted and protected, ensuring the confidentiality of the data."}]}],"pr":"f5e60abc3ac7be660025a077c2aab4158caace17bf64dc5cfed842b138ca54b9"}