{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of transaction data?","a":"Cryptographic technology: Blockchain uses cryptographic technology to protect the security of data. Each transaction uses digital signatures to verify its source and authenticity, ensuring that only individuals holding private keys can sign transactions. In addition, blockchain employs hash  functions and Merkle trees to ensure the integrity of the data."}]}],"pr":"eafc02fed982030148955c9b4b11fff97cf3a399a0c5b7bb6e32740fdaade738"}