Apple Reference Image Signs Photos at the Sensor, Moving Provenance Trust Away from C2PA

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Posted on Thu Sep 24 2026 | 11:20 am

Apple has published the design of Reference Image, an iPhone 18 Pro camera mode that signs pixel data at the sensor and develops it in Private Cloud Compute under an Apple signature. Developers on Hacker News and Reddit challenged what it proves, raising photographing a screen, the anonymity guarantee's dependence on Apple's cloud, and whether identity verification is the right use case.

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