Maybe this is already possible, but if it isn't I think it would be supremely cool to be able to use corpses of people with proper clearance to "verify" your way past security doors that you wouldn't be able to.
In case that isn't clear, the scenario would be:
I kill someone who is set up to be able to open a special door.
I can't open that door.
I lift their corpse and go "verify west with corpse"
Door recognizes the dead eyes of the victim and opens!