Researcher shows a Google C2PA chain with a trivial leaf key
David Buchanan says media tools often lack revocation and that a known C2PA issuance flaw breaks its trust model.
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Stories tagged #c2pa
Partial C2PA credentials used to adapt synthetic-image forensic detectors
Reconstructing the last signer’s edits from partial credentials improved detectors on images postprocessed by C2PA tools.
Google rolls out improved SynthID AI content detector, now available globally
Google's improved SynthID detector is now global for checking partner AI watermarks in media.
OpenAI will watermark ChatGPT outputs by default—but only in the EU
OpenAI will watermark ChatGPT text by default in the EU under the AI Act, and leave it off elsewhere.
How to Hack Time, With C2PA
A C2PA exclusion flaw lets a signer timestamp nothing, then change the file undetected.
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Forgery of C2PA on a Pixel 10
Researcher forged a Google Pixel 10 C2PA content credential with genuine signatures, showing root-level attackers can fake photo provenance.
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Apple Reference Image: A New Approach for Verified Photography
Apple introduces Reference Image, hardware-backed verifiable photography on iPhone 18 Pro using sensor signing and Private Cloud Compute to counter AI-generated fakes.
Apple’s new iPhone camera mode promises to prove your photo isn’t AI
Apple's iPhone 18 Pro adds a Reference Image mode that cryptographically signs camera sensor pixels to prove photos were not AI-generated or edited.
Instagram’s AI detection is a mess (again)
Instagram is mislabeling ordinary edited photos as AI Content while some AI imagery goes unlabeled, repeating a 2024 detection failure.
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