I agree with you on this but what I meant was more in the sense that even if not allowed to disclose the secrets of the thing you are working on, I'm quite sure

I agree with you on this but what I meant was more in the sense that even if not allowed to disclose the secrets of the thing you are working on, I'm quite sure that you still have plenty to talk about it with your family. If you don't, it is just because you are your own jail, a lot wider than what your work contract can enforce.