• Global community
    • Language:
      • Deutsch
      • English
      • Español
      • Français
      • Português
  • 日本語コミュニティ
    Dedicated community for Japanese speakers
  • 한국 커뮤니티
    Dedicated community for Korean speakers
Exit Search
0

Signature cause "invalidation" of previous sigs

New Here ,
Nov 29, 2022 Nov 29, 2022

Copy link to clipboard

Copied

I have a pdf with a valid signature (written with my own routines). Adobe says "valid".
If I add another signature, the Adobe acrobat (newest version) shows first sig invalid.
My verification says "valid", Foxit-Reader says "valid", the DSS Demonstration WebApp page from the EU says "valid".
So, what can cause the "invalid"-info in Adobe?

The pdf was created with libreoffice writer 7.4
The xref of the original pdf is not segmented
I didn't make any changes between the signatures
The first signature don´t use restrictions (DocMDP, etc), also the pdf didn't
If I click "view signed version" and the report I got some issues (see picture)

Bernd26717992y3mp_0-1669725982794.png

Can someone give me a hint/ where I need to look at?

Bernd

TOPICS
Security digital signatures and esignatures

Views

433

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Enthusiast ,
Dec 06, 2022 Dec 06, 2022

Copy link to clipboard

Copied

LATEST

Please share an example PDF that illustrates the issue, both before and after your second sigature.

(You already mentioned the obvious hints, so you are aware of the usual snares and pointing you to them won't help you.)

As you mention the newest version of Adobe Acrobat - do slightly older versions not declare the first signature invalid?

Votes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines