I can’t say for sure the plans aren’t on the net, but I’m sure as hell not searching for them. I expect I’m a few google searches away from finding out just how effective the NSA is if i start googling for h bomb plans. And unlike imaginary space monsters, Windex won’t scare away the jackboots that kick my door in. Your results may vary.
It wasn't many years ago when the jackboots would kick in your door for UFO snooping. I don't expect disclosure of H-bomb plans, because those would still be classified as "threatening".