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> sign your damn video with a public key already Surely the imaging companies are on to this by now, right? They should be signing the raw data as it comes off

> sign your damn video with a public key already Surely the imaging companies are on to this by now, right? They should be signing the raw data as it comes off the sensor. Tesla does this for the input and the output, on-chip if I recall.

EGreg 7y ago
How about encrypting video with the public key, on the hardware? Then we can have cameras all over the place and finally solve issues like rape, etc. by figuring out what happened. We just need the plaintiff or multiple jury members to agree in writing to subpoena the video and decrypt it. You can use shamir secret key sharing to give the ability to obtain a key to a video. So basically storing a lot of encrypted video from private areas, and trusting the camera makers to not install a backdoor. I guess the only thing I don't like about this is that a camera maker can be bribed to create a deepfake to frame some person. Video evidence would be admissible in court only from trusted encrypted-camera makers, until one or two scandals for a camera maker will bring the trust to zero.
michaelt 7y ago
As long as you can point a camera at a printout, you can get a camera-signed photoshop.
Nursie 7y ago
> Surely the imaging companies are on to this by now, right? They should be signing the raw data as it comes off the sensor. Tesla does this for the input and the output, on-chip if I recall. So all post-production work ceases? Or do we have a situation where the original is published alongside the media-edition where they've applied a few filters and adjusted the colour space? I'm not saying it's a bad idea, just interested in how it might work.
- killjoywashere 7y ago
  Right, you string the signatures together. "This image was generated by Tom Fipples on a Nikon D610, working the Washington Post, and edited by Jane Wizzlepans working for AP by X copy of Photoshop. Certs include Nikon, Washington Post, and Adobe. Signatures include Tom and Jane. And the whole chain has to be in sequence. Just like intermediate certs in all the other parts of your browser.
  - Nursie 7y ago
    OK, so we're effectively (to my mind) looking at something like git with signing on every commit, and an image file being its own self-contained repo, so you can [;ay back through the versions to the 'root' that comes from a camera. Presumably this format is going to be of interest to journalists and courts, at the very least, though courts are most likely going to be most interested in the simplest case - the provable original. Interesting idea :)

EGreg 7y ago

How about encrypting video with the public key, on the hardware? Then we can have cameras all over the place and finally solve issues like rape, etc. by figuring out what happened. We just need the plaintiff or multiple jury members to agree in writing to subpoena the video and decrypt it. You can use shamir secret key sharing to give the ability to obtain a key to a video. So basically storing a lot of encrypted video from private areas, and trusting the camera makers to not install a backdoor. I guess the only thing I don't like about this is that a camera maker can be bribed to create a deepfake to frame some person. Video evidence would be admissible in court only from trusted encrypted-camera makers, until one or two scandals for a camera maker will bring the trust to zero.

michaelt 7y ago

As long as you can point a camera at a printout, you can get a camera-signed photoshop.

Nursie 7y ago

> Surely the imaging companies are on to this by now, right? They should be signing the raw data as it comes off the sensor. Tesla does this for the input and the output, on-chip if I recall. So all post-production work ceases? Or do we have a situation where the original is published alongside the media-edition where they've applied a few filters and adjusted the colour space? I'm not saying it's a bad idea, just interested in how it might work.

killjoywashere 7y ago
Right, you string the signatures together. "This image was generated by Tom Fipples on a Nikon D610, working the Washington Post, and edited by Jane Wizzlepans working for AP by X copy of Photoshop. Certs include Nikon, Washington Post, and Adobe. Signatures include Tom and Jane. And the whole chain has to be in sequence. Just like intermediate certs in all the other parts of your browser.
- Nursie 7y ago
  OK, so we're effectively (to my mind) looking at something like git with signing on every commit, and an image file being its own self-contained repo, so you can [;ay back through the versions to the 'root' that comes from a camera. Presumably this format is going to be of interest to journalists and courts, at the very least, though courts are most likely going to be most interested in the simplest case - the provable original. Interesting idea :)