Author here; it relates more with physical security and I've used them in the military and in corporate structures. Most duress word programs are designed to be spoken; say security calls because an alarm is set off and the aggressors are coercing you to get the security off their backs. One may say, "Sorry I was working late and fumbled the alarm. Mr. Rogers has a board meeting tomorrow so I've been working late," where Mr Rogers is a fake name of no one that works at the company.

I kinda just thought to turn that concept into a PAM as a thought-experiment mostly but there are some edge case security examples where something like this could be useful, say for journalists or when dealing with corporate espionage.

I see, thanks a lot for your clarification.