Formally, it needs to be approved by 3 people: the President, the Minister of Defence and the Chief of the General Staff. Then (I think) it doesn’t launch rockets. It unlocks them and sends a signal to other people to actually launch them.
Also, it is speculated to be some way to launch them without confirmation from all 3 people in case some of them cannot technically approve (e.g. briefcase doesn’t work/the person is dead/communication problems), but the details of how exactly it works are unknown.
Formally, it needs to be approved by 3 people: the President, the Minister of Defence and the Chief of the General Staff. Then (I think) it doesn’t launch rockets. It unlocks them and sends a signal to other people to actually launch them.
Also, it is speculated to be some way to launch them without confirmation from all 3 people in case some of them cannot technically approve (e.g. briefcase doesn’t work/the person is dead/communication problems), but the details of how exactly it works are unknown.