JPEG Working Groups, Sausages, and Perceptual Hashes

Sometimes it pays to be a critic. Last year, I attempted to join the Content Authenticity Initiative (CAI) and Coalition for Content Provenance and Authenticity (C2PA). Both groups were trying to define a standard for identifying provenance: tracking ownership and changes to a picture, video, etc. I ended up not joining C2PA because of the restrictive membership terms. In contrast, it took over 6 months, but I did end up joining CAI. CAI is supposed to work in conjunction with C2PA. However, sin...

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