Ranjeet Kuruvilla created PDFBOX-5182:
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Summary: Detect whether a Signature is out of Date
Key: PDFBOX-5182
URL: https://issues.apache.org/jira/browse/PDFBOX-5182
Project: PDFBox
Issue Type: New Feature
Components: Preflight
Affects Versions: 3.0.3 JBIG2
Reporter: Ranjeet Kuruvilla
Acrobat can detect, if a Signature is invalid. In particular one can see, if a
Signature is outdated. That can happen, when a person signs a Document and then
changes a Textfield or a Checkbox or any other field.
It would be great, if one could detect, whether one could use PDFBox to detect
whether a Signature has been invalidated.
I attached the sign one can see in Acrobat once a Signature is invalidated
!Invalid Signature.png!
.
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