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

Adrian McCullagh amccullagh at live.com
Thu Mar 26 16:55:47 EDT 2015

What about N out of T keys to override.  That is the flight crew may be 6 people and 3-4 out of 6 can override the locked door. 

Dr Adrian McCullagh
Ph.D., LL.B. (Hons), B. App. Sc.(Computing)
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email: amccullagh at live.com.au

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From: Thomas Asta
Sent: ‎Thursday‎, ‎26‎ ‎March‎ ‎2015 ‎11‎:‎01‎ ‎PM
To: cryptography at metzdowd.com


I think this is the appropriate list to solve this problem.
Maybe you have heard of the airbus crash in Germany. The door to the cockpit was locked and one pilot was inside and one outside. Even for the toilet pilots have to leave the locked space. And the crew knows the pin to open the door and there exists even a crew wide known and for the plane or company never changed  security code, which opens the door for 30 secs.
In case a person wants to attack one person outside the cockpit this in many cases possible.
At the turkish or cyprus airport even glas bottles, Coke oneway metal bottles or forks from the restaurant are available at the gates.
If we suggest a setting that no one outside knows the code, Does a zero knowledge approach (see wikipedia) work or is a third party authentication from tower needed to unlock the doors? Any suggstions?

Regards Tom.
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