At least in America, the relevant organization would be shouting their successes from the rooftops to get more budget, get more goodwill, and make careers on the back of that casework.
Shouting successful secret missions just doesn't seem like something they would be doing as it could lead to the "enemy" learning ways and methods and what not. The only people they have to convince are the Gang of Eight.
Plenty of ways to take credit without revealing sensitive info.