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I'm trying to sign PDFs using a digital signature from a smart card.
Right after the file is being signed, I'm seeing "Document has been altered or corrupted since it was signed" error.
Signing the file with a self signed digital signature on file works just fine.
Signing the file with the smart card signature works just fine in Foxit PhantomPDF and Comsign Trust Desktop.
I'm using Adobe Acrobat Pro DC 2019.010.200064.
I saw a previous discussion with a similar error that was not resolved.
1. From the name of the user that openner the thread it seems where both from Israel. Could it be related to some timzone issue?
2. It was suggested on this thread that it's LTV related. Is it possible to disable LTV, i.e. make Acrobat not add LTV information?
The source file (unsigned):
File signed with smart card signature:
File signed with file signature:
File signed with Comsign Trust Desktop with smart card siganture (works just fine):
Was there any resolution on this. Getting the same issue here when we save our PDF. Cert and Sig are all valid, however getting this altered message and there is no history when we look at it under Adobe Acrobat Pro DC
I have the exact same symptom, also using Comsign certificate, was there any resolution for this behaviour?
Same problem here with Comsign smart card. Is there any resolution??