FJJP,
The Soviet style "everything is a military secret" approach never washed here and there has to be a balance. The press and public expect to be told a certain amount, and our system presupposes having an informed electorate. Without information, public consent would be lacking, and even recruitment would suffer.
And I think that giving people details of the numbers of platforms procured and in service, broad capabilities, and uncovering procurement policies and cock-ups while remaining tight lipped about tactics and the detailed parametrics of weapons or details of ongoing operations is about the right compromise.
Of course the enemy's task would be made more difficult if we hid the fact that we operated the Vickers Funbus at all, but that ain't going to happen. Nor did it happen in the 40s, when we published details about the Spit and the Blenheim, even though we knew Herman was looking.