Combine two or more authentication methods eg RFID card plus PIN
Schlüsselwörter
door,
elevator,
interior,
office,
lift,
architecture,
wall,
building,
floor,
room,
entrance,
corridor,
empty,
business,
metal,
glasses,
hotel,
design,
nobody,
hall,
house,
bathroom,
closed,
steel,
light
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