英文關鍵字
access
accessibility
alarm
authentication
authority
business
businessman
button
card
closed
closeup
code
concept
control
crime
digital
door
electronic
enter
entrance
entry
equipment
finger
hand
home
house
identification
inserting
key
keypad
less
lock
modern
number
office
open
pass
password
precaution
protect
protection
room
safety
secure
security
sensor
sign
system
thief
unlock