In the case where someone knows where a back-door resides, say (maybe for having made it..) I suppose that the only Enterprise-friendly solution would be..
..well, you know. with extreme prejudice.
Hey you're all just-like-the-NRA: the only remedy for a bad-guy-with-a-code is, a Good-guy-with-a-code that erases the bad-guy's good code.
Brain hurts. Want yellow/oily paper-tape with bootstrap loader. Digits were warmer, fuzzier then.
Only Safe-mantra for an ITer:
I. Know. Nothing.
What is this place, how did I get here? Please show me where the sidewalk is. I want to go home.
Y.P.B.-with-Feeling.