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> 2. cameras can hash / sign every other frame or similar - we can build a chain of hardware to image that can be followed - and of an image or video does not h
by Kalium 7y ago
> 2. cameras can hash / sign every other frame or similar - we can build a chain of hardware to image that can be followed - and of an image or video does not have a CA cert chain it should be as mis-trusted as a web site without TLS
Sure! Also, by total coincidence, now it's possible to trace every single photograph ever taken to whoever took it. A bunch of photojournalists in Syria, Iran, Mexico, and Missouri go missing, but I'm sure that's a coincidence.
Traceability is not without its drawbacks.
- slig 7y agoOne can always copy the photo/video without those (see "analog hole").
- llao 7y agoNot if the hashes are also hidden as pixel structure in the image. Something already done for preventing screenshot leaks (World of Warcraft iirc) or to trace movie leaks.
- slig 7y agoDoes the information hidden inside a screenshot from WoW is resilient enough to survive a capture from a cell phone camera with JPEG compression and everything in between?
- Kalium 7y agohttp://www.eurecom.fr/fr/publication/975/detail/a-survey-of-watermarking-algorithms-for-image-authentication http://www.eurecom.fr/fr/publication/975/detail/a-survey-of-... Not perfectly, but watermarking images in ways that survive re-encoding is far from impossible or unknown.