{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of data?","a":"Cryptographic technology: Blockchain uses cryptographic techniques to safeguard the security of the data.  Each transaction uses digital signatures to verify its origin and authenticity, which are generated using a pair of public and private keys, ensuring that only the holder of the private key can sign the transaction."}]}],"pr":"994672c93a75508334ef8f5052a7976f776c16e659edc9bf37df37f0f243e97e"}