{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the immutability and transparency of data?","a":"Cryptographic technology: Blockchain uses cryptographic methods, such as public-private key encryption algorithms, to encrypt and sign data. Each participant has their own public-private key pair, using the private key to  sign the data, and other participants can verify the signature with the public key."}]}],"pr":"e5227e1d67bb4c858e0ef7f541fe27ae65630e09e38f5d6e85f5e8f63a79dced"}