{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure that data cannot be tampered with?","a":"Cryptographic protection: Blockchain uses cryptographic  methods to encrypt and verify data, including public-private key encryption algorithms and digital signature technology. Each participant has their own public-private key pair, and the data is signed using the private key."}]}],"pr":"e6cd6a0a447237a188fd99b9fead6e7db13b6bacf393bdd6b6b0ac3982e38f92"}