Off-topic: standards for embedded signing of digital images?

2021-09-08 Thread Mark H. Wood via Gnupg-users
I didn't know where else to turn, for folks who might be able to point me at standards for or discussion of embedding crypto signatures in image formats, to detect tampering with the image. -- Mark H. Wood Lead Technology Analyst University Library Indiana University - Purdue University Indianap

Re: Off-topic: standards for embedded signing of digital images?

2021-09-09 Thread Valtteri Vuorikoski
"Mark H. Wood via Gnupg-users" writes: > I didn't know where else to turn, for folks who might be able to point > me at standards for or discussion of embedding crypto signatures in > image formats, to detect tampering with the image. While you can technically embed some kind of signature in pre

Re: Off-topic: standards for embedded signing of digital images?

2021-09-09 Thread Oli Kon via Gnupg-users
On 2021-09-08 4:53 p.m., Mark H. Wood via Gnupg-users - gnupg-users@gnupg.org wrote: I didn't know where else to turn, for folks who might be able to point me at standards for or discussion of embedding crypto signatures in image formats, to detect tampering with the image. There are no standar

Re: Off-topic: standards for embedded signing of digital images?

2021-09-10 Thread Mark H. Wood via Gnupg-users
On Thu, Sep 09, 2021 at 10:43:05AM +, Oli Kon via Gnupg-users wrote: > On 2021-09-08 4:53 p.m., Mark H. Wood via Gnupg-users - > gnupg-users@gnupg.org wrote: > > I didn't know where else to turn, for folks who might be able to point > > me at standards for or discussion of embedding crypto sig

Re: Off-topic: standards for embedded signing of digital images?

2021-09-10 Thread Ryan McGinnis via Gnupg-users
Years ago, I think Canon offered some kind of in-camera file format that supposedly could prove that the file had not been tampered with. Eventually exploits were found that rendered it unreliable. https://hk.canon/en/support/to-users-of-the-original-data-security-kit-osk-e3-original-data-veri

Re: Off-topic: standards for embedded signing of digital images?

2021-09-11 Thread Oli Kon via Gnupg-users
On 2021-09-10 8:00 p.m., Ryan McGinnis via Gnupg-users - gnupg-users@gnupg.org wrote: Years ago, I think Canon offered some kind of in-camera file format that supposedly could prove that the file had not been tampered with. We appear to be talking about two different things here. Both Nikon a

Re: Off-topic: standards for embedded signing of digital images?

2021-09-11 Thread Стефан Васильев via Gnupg-users
Mark H. Wood wrote: I didn't know where else to turn, for folks who might be able to point me at standards for or discussion of embedding crypto signatures in image formats, to detect tampering with the image. I do not know any, but like to add my POV. Let's say GnuPG could digitally sign a .p

Re: Off-topic: standards for embedded signing of digital images?

2021-09-11 Thread Ryan McGinnis via Gnupg-users
No, I think what Canon and Nikon attempted to implement was something that, when paired with a validation software, would say with certainty "this is exactly what the camera wrote to the card". It wasn't saying anything about whether what was being photographed was real or faked, merely that af