Mobile uKey [USB (universal serial bus) Key] and card-less cash withdrawal System and mobile uKey and card-less cash withdrawal method

The invention provides a mobile uKey [USB (universal serial bus) Key] and card-less cash withdrawal System and mobile uKey and card-less cash withdrawal method. The mobile uKey and card-less cash withdrawal method includes connecting a mobile uKey to a terminal; allowing a user to log in a client of a bank to input card-less cash withdrawal information in current business; enabling the client of the online bank to transmit the card-less cash withdrawal information to the mobile uKey, enabling the uKey to generate a disposable cash withdrawal password, electronically signing the cash withdrawal passwords and the card-less cash withdrawal information, returning electronic signature information to the client of the bank, enabling the client of the bank to transmit the electronic signature information to a backstage of the bank and storing the electronic signature information in the backstage of the bank; matching the disposable cash withdrawal passwords inputted by the user with the corresponding electronic sign