So, this is a bit of a touchy question. From the beginning, even before the true destructive and killing power of The Bomb was clear to its own creators, one thing was certain: Nobody should ever acquire nuclear weapons if those who do have them can help it. That may be a hypocritical stance for current nuclear powers to take — but they’re live hypocrites, so whatever.
The justified fear over nuclear technology led to the creation of one of the weirder bits of legislation: the classification of “born secret.” This refers to the fact that, under a certain reading of the law, information on the design and function of nuclear weapons is considered stolen classified information even if you come up with it yourself.
Read more at Explaining the unimaginable: How do nuclear bombs work?