I have an pdf. I signed it, then I add another signature. The first become invalid because of changed pdf. This also happens, when I add the dss-information after the signature.
The problem is only visible in adobe.
All other pdf-verifing software say "okay". The pdf is okay, because nothing is changed in the byterange of the signatur.
What can I do make adobe verify it okay?
I added examples:
The eep_GdPicture.pdf ist the unsigned original pdf.
eep_GdPicture_signed.pdf has two invalid signatures (says only adobe)
When a signed document is modified after signing, the signatures become invalid. That's expected behaviour. Whatever other software you use, it's not working correctly.
But it´s an incremental update ... nothing is changed in the byterange of the sig ?!
If you change a document after signing, you changed the document and signatures need to get invalidated as the document is not anymore as signed.