英文關鍵字
abstract
access
alpha
animation
art
background
business
button
cartoon
close
concept
cyber
defense
design
encryption
firewall
flat
gate
graphic
icon
information
interface
internet
isolated
key
keyhole
line
lock
locker
metal
modern
open
padlock
password
privacy
private
safe
safety
secret
secure
security
sign
silver
simple
steel
symbol
system
unlock
web