{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to verify Invariants in a Blockchain?","a":"Encryption technology: Blockchain uses encryption  algorithms (such as SHA-256) to generate unique identifiers for each block, namely hash values. The data in subsequent blocks contains the hash value of the previous block, forming a chain structure. Any attempt to tamper with the data in previous blocks will cause the hash value of subsequent blocks to change, thereby rendering the entire chain invalid."}]}],"pr":"9849efb117c8a7e2fad7e6d17feb75c9b5afb2242ab1a860b99ad1c876d8fa06"}