{"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":"Data Encryption: By encrypting data  with the private key, the security of data during transmission and storage is ensured. Only users who possess the corresponding private key can decrypt the data, thereby ensuring the security and privacy of the data."}]}],"pr":"7a26931f48987739fb50eaeba9cb612ad5fb8eff98573fb34f2fd992ab8e7411"}