floofloof@lemmy.ca to Technology@lemmy.worldEnglish · 1 year agoNew Leica camera stops deepfakes at the shutterspectrum.ieee.orgexternal-linkmessage-square77fedilinkarrow-up1174arrow-down116
arrow-up1158arrow-down1external-linkNew Leica camera stops deepfakes at the shutterspectrum.ieee.orgfloofloof@lemmy.ca to Technology@lemmy.worldEnglish · 1 year agomessage-square77fedilink
minus-square∟⊔⊤∦∣≶@lemmy.nzlinkfedilinkEnglisharrow-up3·1 year agoI was too tired to investigate further last night. That is the case here, sections of data are hashed and used to create the certs: https://c2pa.org/specifications/specifications/1.3/specs/C2PA_Specification.html#_hard_bindings Which means that there isn’t a way to edit the photo and have the cert match, and also no way to compress or change the file encoding without invalidating the cert.
minus-squarenutsack@lemmy.worldlinkfedilinkEnglisharrow-up1·edit-21 year agoso it’s for jpeg shooters, basically. unfortunately the leica bodies aren’t really known for producing good jpegs.
I was too tired to investigate further last night. That is the case here, sections of data are hashed and used to create the certs:
https://c2pa.org/specifications/specifications/1.3/specs/C2PA_Specification.html#_hard_bindings
Which means that there isn’t a way to edit the photo and have the cert match, and also no way to compress or change the file encoding without invalidating the cert.
so it’s for jpeg shooters, basically. unfortunately the leica bodies aren’t really known for producing good jpegs.