Single key to Multiple locks?

[Sphinxen]

Hey guys,

Longtime reader, first time poster

I've been doing my reading and practice, but one thing i haven't come across yet is how, ie. a janitor's key is working. How one key can open several locks, when each lock has a diffrent key. How does it work?

Can anyone please explain it to me.

Sphinx

[FrenchKey]

You will find ALL you need/want to know about MasterKeying (and even more ) here :

http://www.crypto.com/papers/mk.pdf

FrenchKey

[Sphinxen]

Sweet, that's exactly what i've been searching for, but sadly never could find.

Thanks FrenchKey!