Apple's Reference Image signs photos at the hardware level to prove they're unaltered
eyishazyer · x · 2026-09-10
From the same thread: in Reference mode, the sensor signs every pixel at capture, producing a sealed reference photo shown next to your edit as proof of exactly what changed. Third-party apps get API access.
Why it matters: proving a photo is real is an expensive question for photojournalists and insurance claims; a capture-time signature is far harder to fake than strippable metadata. C2PA and SynthID already exist — the novelty is hardware-level signing before the photo is even a file.
Limits: opt-in only, doesn't cover existing photos, unavailable in China at launch, EU gets no capture at launch, and it only proves the image wasn't altered post-capture.
Related event: Apple's Reference Image Uses Sensor-Level Signing to Prove Photos Are Real(3 posts)→
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