passkey
passe-partout
master key
master , ***

So I went to the office and got the master key.

Do you know where I can find a master key?

You add a 128-bit value to that, which is part of the master key.

I thought they might have access to a master key.

Three seconds, he said, for my husband to hand over the master key.

He had already put the master key in the top lock.

So the whole thing is driven by a 384-bit master key.

Giving him a master key, the Cardinal takes his leave.

Be a different master key for the next ward and all that sort of thing.

My clue was your use of a master key to get me to answer the door.