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It will be interesting to see what solutions people will come up with to support cropping images and videos. Perhaps one can already do that with Merkle tree in
by JanisErdmanis 3y ago
It will be interesting to see what solutions people will come up with to support cropping images and videos. Perhaps one can already do that with Merkle tree inclusion and consistency proofs. Definitely good times ahead for doing cryptography.
- koliber 3y agoYou could crop the picture and the result would no longer be singed. However, if someone wanted proof that the cropped picture is genuine, you could offer the uncropped signed version and do a pixel by pixel comparison of the cropped area. Kind of like a chain of provenance to a signed source. This could work for other manipulation. Change the colors in the image. Then if someone wants proof, offer the original and describe the transformation.
- JanisErdmanis 3y agoSure. But what if the cropped part is sensitive content? Or if the video is exceedingly long? Then, providing a full source could become prohibitive.