This conversation has been merged. Please reference the main conversation: Lightroom Classic: Ability to hide sensitive photos
I would have thought a collection or image attribute to hold a password would do the trick. Password protected images would simply not show. A menu item would allow passwords to be entered (including an "ALL" password"). I suggest a separate utility - even a simple text file would allow a backdoor to manage forgotten passwords. I am not suggesting bulletproof security here, just a simple mechanism to aid showing people your images in Lightroom safely.