master key
a method that a computer uses to know who you are, for example by recognizing your finger or face, rather than needing a password(= a secret combination of words or numbers) to be entered:
Choose the headset or device on your phone and use a passkey or PIN.
The wizard allows you to choose a passkey for any connected Bluetooth device.
The night porter used a passkey for those rooms that were empty or where no one answered.
During the fire, building managers gave firefighters a ring full of pass keys.
It may also ask you for a passkey if you have never paired the devices before.

SMART Vocabulary: related words and phrases

Building: locks & locksmithing
bolt
catch
closer
combination
combination lock
deadbolt
deadlock
fob
key
key box
key fob
key ring
keycard
keychain
lock
lockbox
locksmith
master key
mortise lock
padlock

You can also find related words, phrases, and synonyms in the topics:

Computer concepts