Nuclear Briefcase

I want to know what is the name of the nuclear briefcase that was (I do not know if it exists) the Soviets, now the Russians, which contain (ed) the fire codes of the nuclear arsenal of Russia. I know it starts with tsche-but I am not sure.

According to this article, one that he wore Gorbachev in the coup attempt was the code name Cheget,

What's "football" in Russian?

"Футбол"

In English we call it the "nuclear Russian football, but I do not know what they say. It definitely exists. It is common knowledge.