backup key
Secondary entry device
A backup key is a duplicate key kept in case the original is lost, broken, or inaccessible: I keep a backup key under the doormat.
In computing and encryption, a backup key is a secondary cryptographic key that can decrypt data if the primary key becomes unavailable—controversial when governments demand backup keys to access encrypted communications.
- spareHeld in reserve
- duplicateExact replica of original
- recoveryRegaining what was lost
- passwordAuthentication string
- encryptionConverting data into code
unlock · failsafe · reserve · copy · master · emergency · override · code · safeguard · secondary · fallback · escrow · vault · safe deposit · cold storage · passphrase · access · restore
- Cryptographic Keyskeypair, keychain
- Non-essentialsextras, accessories, add-ons, spare parts, embellishments
- Access Methodspassword, PIN, fingerprint, swiping card, biometrics