[jira] [Reopened] (PDFBOX-3738) Signature not visible on Acrobat

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-3738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr reopened PDFBOX-3738:
-------------------------------------

This whole thing is more complex than I thought and I'm not sure what to do, I may revert my change. Some facts I found out in the meantime:
- the "invisible signature" effect does not happen with all versions of Adobe Reader. Maybe it is a setting, maybe not.
- removing /NeedAppearances breaks certification, because Adobe considers the document to be "changed".

> Signature not visible on Acrobat
> --------------------------------
>
>                 Key: PDFBOX-3738
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3738
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Signing
>    Affects Versions: 2.0.5
>         Environment: Java 1.8
>            Reporter: Marco Monacelli
>            Assignee: Tilman Hausherr
>            Priority: Blocker
>             Fix For: 2.0.6, 3.0.0
>
>         Attachments: prova2_orig.pdf, prova2_orig_signed_iText.pdf, prova2_orig_signed_pdfbox.pdf
>
>
> Signing this specific file with PDFBox, I get a non-visible signature in Acrobat. 
> Using iText the signature is visible.



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