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https://issues.apache.org/jira/browse/PDFBOX-6244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18108647#comment-18108647
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Michael Klink commented on PDFBOX-6244:
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[~msahyoun], I think that's much better. 

> Clarify that parsing doesn't check signatures
> ---------------------------------------------
>
>                 Key: PDFBOX-6244
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-6244
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Minor
>             Fix For: 2.0.38, 3.0.9 PDFBox, 4.0.0
>
>
> Clarify that parsing doesn't check whether any signatures are verified / 
> valid, and that loading a manipulated / "updated" PDF will not fail parsing. 
> This applies to certification constraints as well. This behavior is not a 
> security flaw, it's a missing feature. The ShowSignature example offers a 
> limited signature check. The gold standard is Adobe Reader.



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