In article , Tim S
writes

I wasn't thinking necessarily of a Yale-type electric strike plate: I agree
they are horribly weak.

When I worked at Imperial College, we had an electronic coded proximity lock
on the computer room door, which was secured with a combination of maglock
and electric shoot bolt.

The maglocks aren't invincible (big bloke can shoulder them) and need
permanent power, but the shoot bolt was pretty solid, being buried in the
door.

I've looked at similar ideas in the past and came to the conclusion that
even the best were weak compared with the cheapest of BS3621 approved
mortice deadlocks.

When you look at the build and dismantle one of those you can see the
features that have been added over the years to thwart the various
attacks that burglars come up with and none of the electrically operated
locks I have seen have them. The only exception I could think of would
be to fit a BS mortice and leave a key on the inside with a motor drive
to rotate it ;-).
--
fred
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