https://bugs.kde.org/show_bug.cgi?id=461371
--- Comment #3 from Nicolas Fella <nicolas.fe...@gmx.de> --- It looks like this does not explain the problem. Signing https://invent.kde.org/graphics/okular/-/blob/master/autotests/data/hello_with_dummy_signature.pdf with Acrobat doesn't add a DocMDP entry either. The relevant part of the document signed by Okular: %% Original object ID: 32 0 29 0 obj << /ByteRange [ 0 490918 499126 378 ] /Contents /Filter /Adobe.PPKLite /M (D:20230428140625+02'00') /Name (Nicolas Fella) /SubFilter /adbe.pkcs7.detached /Type /Sig >> endobj And by Acrobat: %% Original object ID: 18 0 23 0 obj << /ByteRange [ 0 3871 8413 9388 ] /Contents /Filter /Adobe.PPKLite /M (D:20230428140204+02'00') /Name (Nicolas Fella) /Prop_Build << /App << /Name /Adobe#20Acrobat#20Reader#20#2864-bit#29 /OS [ /Win ] /R 1507584 /REx (2023.001.20143) /TrustedMode true >> /Filter << /Date (Apr 4 2023 18:35:16) /Name /Adobe.PPKLite /R 131104 /V 2 >> /PubSec << /Date (Apr 4 2023 18:35:16) /R 131105 >> >> /SubFilter /adbe.pkcs7.detached /Type /Sig >> endobj The difference is the /Prop_Build entry, but not sure this explains the issue -- You are receiving this mail because: You are the assignee for the bug.