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https://issues.apache.org/jira/browse/PDFBOX-4020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16260633#comment-16260633
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Ralf Hauser commented on PDFBOX-4020:
-------------------------------------

see also PDFBOX-1848

> Into signature embedded Signed Timestamp for validation
> -------------------------------------------------------
>
>                 Key: PDFBOX-4020
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4020
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Signing
>    Affects Versions: 2.0.8
>            Reporter: Alexis Suter
>         Attachments: SignatureValidation_Embedded_Timestamping.java.patch
>
>
> I would like to contribute a new example for embedded Timestamping.
> The Timestamp is beeing embedded into the existing Signature (which has so be 
> prepared big enough for it). So that the document does not get changed. 
> This Step is a preparation for the LTV and includes some reorganisation for 
> Validation-Purposes.
> I am still working on embedding the OCSP-Data, wich will take a bit longer. 
> For that I have excluded and commented out the Code for it, to avoid 
> confusion.
> Possible Usage:
> {code:java}
> exec:java -X 
> -Dexec.mainClass="org.apache.pdfbox.examples.signature.validation.CreateEmbeddedValidation"
>  -Dexec.args="${infile} -tsa ${tsa}"
> {code}
> CreateSignature has been changed to add SignatureOptions, where we can choose 
> the size of the signature.



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