[Cryptography] Zero Knowledge for Opening the Cockpit of an Airbus

Phillip Hallam-Baker phill at hallambaker.com
Thu Mar 26 15:05:27 EDT 2015

This is sadly a very well known problem in security: Almost every
security problem has a very simple solution if that is the only
problem that is a concern.

If all you care about is hijackers boarding planes you barricade the
cockpit door. If all you care about is pilots crashing planes in a
suicide you remove the cockpit door.

Exactly the same problem occurred with London Taxis a while back. Due
to a couple of design flaws (reverse hinged doors, latches that look
like window winders) people kept getting killed accidentally opening
the doors. So journalists started a campaign and poo-pooed suggestions
that if the taxi driver controlled the door lock they might kidnap
women and drive around not letting them out. Guess what happened when
they introduced locks?

Security is hard because it requires consideration of multiple issues.

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