[WalterBright]

Eh, I'd design an electronic lock that is operated with a phone app. There'd be nothing visible of it on the surface of the door. There'd be no way to tell what the make/model of the lock was. There'd a flange the full length of the door so you couldn't even tell where the bolt was.

[ineedasername]

What if your phone ran out of power though?

[WalterBright]

You could have a magnetic switch somewhere that you could tap SOS on with a magnet or something. Or just knock on the door with a certain pattern. Or speak "Open the pod bay doors, Hal" into a pinhole mike. I'm sure you could think of many methods.

[isostatic]

And when your house has no power?

[kelnos]

Battery backups, of course.

There will always be failure modes. I mean, the failure mode for a traditional lock is "I lost my keys". Unless you have someone else with a spare set who can get to your location in a time you deem reasonable, you're going to have to have the door forced.

[WalterBright]

I once had a storage unit, and lost the key to the padlock. The manager said "no problem", and we went out to the unit. The manager pulled out a battery operated angle grinder, and cut the lock off in about 5 seconds.

You're going to need a bank vault to beat an angle grinder. Those tools are the shiznit.

[acuozzo]

> You're going to need a bank vault to beat an angle grinder.

To beat? Agreed.

With that being said, grinding through a circular padlock takes much, much longer. I'd suggest using one of those for a storage unit.