{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What role do cryptographic technologies play in blockchain?","a":"Data immutability: Through hash algorithms and encryption algorithms, blockchain can ensure the  integrity of data during transmission and storage. Hash algorithms are used to generate fingerprints of data, any small changes to the data will cause changes in the hash value, making it almost impossible to tamper with the data."}]}],"pr":"f88cd86f002de71eb05cf3912d5c5ca61b2d8f64f65445a57dbd23cba77e3e61"}