I once worked in an area of extreme sensitivity (my desk diary was a registered TS document, for example) and was horrified when a certain 'thing' was named in the Media. It had been so sensitive that the codewords were never spoken except by their initials. Even now I feel reluctant to talk about it.
And many of you here know 'things' as well. The best course has always been to STFU, and carry on confining the subject matter to official channels, and to recipients who actually need to know.
Wishing you all a Happy and Discreet Christmas!