4 ms·

It's worth noting that crypto-signed images have been around for a long time, just in specific professional cameras: https://www.dpreview.com/articles/314673652

It's worth noting that crypto-signed images have been around for a long time, just in specific professional cameras: https://www.dpreview.com/articles/3146736527/canondvke2 https://www.dpreview.com/articles/3146736527/canondvke2 I imagine, as this sort of thing becomes more common, we'll see image "verification"/signing being a feature on all cameras, and eventually extend to mobile phone cameras for photos/videos as well.

CharlesW 6y ago
That's cool, but it seems like building a trusted chain of custody from source/capture, to editing (where lots of assets will be combined/composited together), to distribution will be tricky. Plus, how does one guarantee that light hitting the camera sensor hasn't already been manipulated?
de6u99er 6y ago
IMO this would just help someone prove that a certain original image was made with a specific camera in regards of IP and to protect themselves at court against claims of having tampered with an image. What we see on the web are mostly resized and heavily compressed images. Not sure how such a cryptographic signature could work in such cases.
- poundofshrimp 6y ago
  Perhaps the publisher can provide a collection of signed versions of the image with a variety of file sizes / resolutions.
bennyp101 6y ago
And once it has been shared, screen-shotted, re-shared, compressed, phone taking a picture of it on a monitor etc Sure, if you want to use it to try and prove you did take/create an image of something, but it doesn't help prove you /didn't/
yosito 6y ago
I think there would be some potential for an photo-based journalism platform that only publishes crypto-signed geo-tagged photos. It seems that stock photos, and even fake photos are the norm on mainstream news sites these days. It's very hard to get verified photographic evidence of news stories.

4 ms·

It's worth noting that crypto-signed images have been around for a long time, just in specific professional cameras: https://www.dpreview.com/articles/314673652

by parliament32 6y ago

CharlesW 6y ago
That's cool, but it seems like building a trusted chain of custody from source/capture, to editing (where lots of assets will be combined/composited together), to distribution will be tricky. Plus, how does one guarantee that light hitting the camera sensor hasn't already been manipulated?
de6u99er 6y ago
IMO this would just help someone prove that a certain original image was made with a specific camera in regards of IP and to protect themselves at court against claims of having tampered with an image. What we see on the web are mostly resized and heavily compressed images. Not sure how such a cryptographic signature could work in such cases.
- poundofshrimp 6y ago
  Perhaps the publisher can provide a collection of signed versions of the image with a variety of file sizes / resolutions.
bennyp101 6y ago
And once it has been shared, screen-shotted, re-shared, compressed, phone taking a picture of it on a monitor etc Sure, if you want to use it to try and prove you did take/create an image of something, but it doesn't help prove you /didn't/
yosito 6y ago
I think there would be some potential for an photo-based journalism platform that only publishes crypto-signed geo-tagged photos. It seems that stock photos, and even fake photos are the norm on mainstream news sites these days. It's very hard to get verified photographic evidence of news stories.