Looks to me like it’s going to be impossible to pinpoint all the leaks. The better approach would probably be to identify the people who for sure aren’t leaking then fire all the rest.
What you do is make examples of a few high profile leakers with long prison sentences and fines, then the rest will STFU................
“The better approach would probably be to identify the people who for sure aren’t leaking then fire all the rest”........
Public hanging is the only real deterrent to those who be “leakers”. Even then, there would be those who would attempt to divulge information.