{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"When do we use persistent nonces in blockchain?","a":"In blockchain, when cryptographic technology is needed in transactions, persistence nonces are employed. A non-ce (nonce) is a random number used for encrypted communication, which ensures that the keys  used in the encryption and decryption process are unique, thereby improving data security. In blockchain scenarios, persistent nonces are typically used to ensure the integrity and security of transaction data, preventing data tampering during transmission. Meanwhile, persistent nonces can also prevent replay attacks, where attackers trick the system by repetitively sending previously recorded transactions without authorization. By using nonces, blockchain can ensure the integrity and security of transactions."}]}],"pr":"7f902187e743eb20445156c4e99ed20e75d14b61919388d1a7160368d817fffe"}