{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the data immutability achieved in blockchain?","a":"Cryptographic protection: The data in blockchain is encrypted and stored using cryptographic algorithms (such as SHA-256) for encryption  and verification. Each time the data is modified, it is necessary to recalculate the encrypted hash value."}]}],"pr":"0547ef91353a6993f9689c12b729fbd0bd6e9651e58fe63928288c8cebd42daa"}