ext_32648 ([identity profile] goldsquare.livejournal.com) wrote in [personal profile] alexxkay 2015-10-30 05:24 pm (UTC)

There are locks which will "lock behind you" by just closing the door.

If they are misaligned (or the frame warps), they can look closed, even click a little, but still not lock behind you.

(My front door is one, albeit one that works.)

Since a lot of my job is risk assessment, my first thought on risk assessment of a lock (mechanical or otherwise) is the case of a false positive (it seems locked, but it isn't) or a false negative (it seems unlocked, but it is). Those can happen with mechanical locks.

A newfangled failure would be something that involved features a high-tech lock has, that mechanical locks do not. So, for example, if an app failure of some kind leaves the lock unable to lock/unlock in some novel way, or if the lock can be suborned through technological failure, or capture/replay, or things like that.

Sorry. This is "my thing" - analysis of failures (real or potential)

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