When the president finally declares his choice of option, it would challenge the president to authenticate using a special code known as the “biscuit,” or Gold Code. This would take a few seconds. If the codes match properly, it would quickly format and transmit a launch order over multiple communications channels directly to the submarine, bomber, and underground launch crews.
This would take a couple of minutes. Shorter than the length of a “tweet,” the order would specify the war plan, the time to begin the strike, an unlock code needed by the firing crews to release their weapons, and a Sealed Authentication Code that must match the codes in the firing crews’ safe. If the codes match, the crews assume the order originated with the president, even though all the codes in the launch order are held exclusively by the Pentagon war room and alternate command centers such as StratCom itself.