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https://issues.apache.org/jira/browse/PDFBOX-4261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16536104#comment-16536104
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Andreas Lehmkühler commented on PDFBOX-4261:
--------------------------------------------

{quote}Alternatively, try building the 2.0 version with 1.6 and correct what 
doesn't work.{quote}
Just to avoid misunderstandings, java 1.6 is the miminum requirement for PDFBox 
2.0.x. So no need to recompile it using java 1.6

But as Tilman already said, it is a really bad idea to stick with java 5, even 
java 6 isn't a good option. Be aware that most of the popular java libraries 
will move forward and support more recent java version such as 1.8 or later 
only.

> Invalidated signature signing pdf twice 
> ----------------------------------------
>
>                 Key: PDFBOX-4261
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4261
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Signing
>    Affects Versions: 1.8.15
>            Reporter: Claudio Tortorelli
>            Priority: Major
>         Attachments: issue_data.zip
>
>
> A customer sent us a pdf that has this problem: when it is signed twice by 
> *pdfbox 1.8.x* the second signature invalidates the first one.
> If we apply the same procedure using *pdfbox 2.0.x* the problem doesn't 
> occur, but the customer required java 1.5 so we can't switch to the new 
> version in this case.
> For +privacy purposes+ we had anonymized the original PDF file by editing 3 
> stream inside the pdf, without altering the original structure. So the file 
> "92752146_noSign_anonymous.pdf" you can find in attachement has not the 
> original text/image streams, but reproduces the problem as the original one.
> Thank you in advance
>  



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