{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the durable nonce be applied to password upgrade operations in a blockchain?","a":"In blockchain, a durable nonce (persistent non-one-time password) is applied to a method of password upgrade operation. When a user attempts to upgrade their password, the system requires the user to provide a non-one-time password, which will be stored on the blockchain along with the user's identity information as an encryption key. Then, the system uses this non-one-time password to  encrypt the user's password, forming an encrypted password. Next, the encrypted password is stored in a smart contract on the blockchain to ensure that only users with the correct non-one-time password can access and upgrade their password.↵↵This application method has the following advantages:↵↵1."}]}],"pr":"afa38cfdf71e3bd1a93c013efffc5adc421122943758fc816d361683472767ee"}