four digit code
- PINAuthentication number sequence
- passwordAuthentication string
- combinationJoining of multiple elements
- lockMechanism requiring a key
- safeFree from peril
keypad · entry · digits · numeric · unlock · security · vault · access · secret · punch · enter · numbers · ATM · locker · cipher · passcode · doorbell · alarm
security strength
four digit codebiometric authentication
Identity verification via body traits
retinal scan · multi-factor authentication · open access · fingerprint recognition · fingerprint scan
access state
four digit codeunlocked
Not fastened shut
unprotected · open access · open · public access · free entry