this post was submitted on 25 Jul 2024
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-----BEGIN PGP SIGNED MEME----- (lemmy.world)
submitted 3 months ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 2 points 3 months ago (1 children)

You can but you need to define what part of the data the signature covers (a signature can't sign itself, so it must be excluded from the data bundle). Signed PDF files has the signature appended after the document data

[โ€“] [email protected] 4 points 3 months ago

Exactly. And even though there are message start and end markers it's not quite clear at which pixel the signed image starts and ends. Also the image format that is signed is not defined.