{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the block hash in blockchain ensure the immutability of data?","a":"Hash function characteristics: The hash function maps data of arbitrary length to a fixed-length hash value, possessing properties such as forward speed, input sensitivity, difficulty in  reverse engineering, and secure anti-collision. This means that even with the slightest change in data, the hash value changes dramatically."}]}],"pr":"75d72c7a0205eede6b2fcb7892eb9544056ec79116397063195ef6642564010d"}