DB LabsQuick Answer
Face ID is Apple's facial recognition system that unlocks your iPhone by mapping your face with the TrueDepth camera. Since iOS 16, it also locks the Hidden and Recently Deleted photo albums by default. Your face data is stored as an encrypted math model in the Secure Enclave on-device, never in iCloud and never sent to Apple.
What Face ID Is
Face ID is the facial-recognition authentication system Apple introduced with the iPhone X in 2017. The TrueDepth camera array on the front of the phone projects more than 30,000 invisible infrared dots onto your face, reads the pattern with an infrared camera, and builds a precise depth map. A neural network in the chip converts that map into a mathematical representation and compares it against the enrolled model to confirm it is you.
Face ID replaces the passcode for most everyday actions: unlocking the phone, authorizing App Store and Apple Pay purchases, signing into apps, and autofilling passwords. It adapts over time to changes in your appearance, such as growing a beard or wearing glasses, and on newer models it works while you are wearing a mask.
How Face ID Relates to Photos
Starting with iOS 16, the Photos app uses Face ID to protect two specific albums. The Hidden album and the Recently Deleted album are now locked by default and require a Face ID scan (or your passcode) to open. This stops anyone holding your unlocked phone from casually scrolling into photos you moved out of sight or deleted but have not yet purged.
This is an authentication gate, not encryption of the photos themselves, and it does not change where the images are stored. The photos still live in your camera roll and count toward your iPhone and iCloud storage exactly as before. You can turn the lock off under Settings, Photos by switching off Use Face ID if you prefer the albums to open without a scan.
Face ID vs. Touch ID for Photos
| Aspect | Face ID | Touch ID |
|---|---|---|
| Method | Facial depth map (TrueDepth camera) | Fingerprint sensor |
| Devices | iPhone X and later (no SE) | iPhone SE, older models, some iPads |
| Locks Hidden / Recently Deleted | Yes (iOS 16+) | Yes (iOS 16+) |
| Data location | Secure Enclave, on-device | Secure Enclave, on-device |
| Stored in iCloud | No | No |
Privacy of Your Biometric Data
Face ID never stores a picture of your face. The depth map is converted into an encrypted mathematical representation and sealed inside the Secure Enclave, a dedicated, isolated coprocessor on the iPhone's chip. The rest of iOS, the main processor, and individual apps can ask the Secure Enclave only one question: does this scan match? They receive a yes or no, never the underlying data.
- On-device only. Your face model is never uploaded to iCloud or transmitted to Apple's servers.
- Not in backups. Face ID data is excluded from iCloud and encrypted local backups, so restoring a phone requires re-enrolling.
- App isolation. The Photos app, third-party apps, and websites cannot read your face data; they only trigger an authentication request.
Face ID and Storage
Face ID has essentially no impact on your storage. The encrypted face model is tiny and lives in the Secure Enclave, not in your camera roll, so it does not eat into the space your photos and videos use. If your real problem is a full camera roll rather than locked albums, the fix is cleaning out clutter, not adjusting Face ID. A tool like Swype Photo Cleaner lets you swipe through photos and delete unwanted ones fast, and you can confirm where your space is going in Settings, General, iPhone Storage.
For related reading, see the iPhone Photo Privacy and Security Guide and how to hide and lock photos on iPhone.
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