access
accessibility
bag
bank
banking
box
business
case
code
confidential
container
craft
door
encrypt
encryption
equipment
green
guard
hack
hacker
hide
key
keyhole
lock
locker
metal
number
object
open
padlock
password
prevention
prison
prisoner
privacy
private
protect
protection
safe
safeguard
safety
save
secret
secure
security
theft
tool
unlock
unsafe