Overview
Apple Reference Image is an opt-in iPhone 18 Pro/Pro Max camera mode that creates cryptographically verifiable photographs. The Main camera sensor signs pixel data at capture; private-cloud-compute develops an unalterable reference JPEG comparable to a digital negative.
Key Features
- Sensor-level cryptographic signing at capture time (not post-processing pipeline)
- Post-quantum signatures and revocation mechanism for compromised sensors/photos
- Side-by-side comparison with editable photo in Photos app
- APIs in iOS/iPadOS/macOS 27 for third-party viewing
Limitations
- Opt-in only; Main camera sensor exclusive
- Capture unavailable at launch in EU and China; EU users can view/develop on iOS 27
- Apple positioning vs c2pa metadata — capture-time vs metadata-only provenance