ASF subversion and git services commented on PDFBOX-3984:

Commit 1826416 from [~tilman] in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1826416 ]

PDFBOX-3984: Add validation data of signer to document + check the signature of 
the OCSP-response, by Alexis Suter

> Add validation data of signer to document
> -----------------------------------------
>                 Key: PDFBOX-3984
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3984
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Signing
>    Affects Versions: 2.0.7
>            Reporter: Alexis Suter
>            Priority: Major
>         Attachments: 1_only_signed.pdf, 2_signed_and_embeddedTs.pdf, 
> 3_signed_external_timestamp.pdf, 4_resultof_signed_eTs_ocsp.pdf, 
> How_LTV_looks_in_adobe.PNG, OcspHelper_VerifySignature.java.patch, 
> SignatureValidation_v0.1.java.patch, SignatureValidation_v0.2.java.patch, 
> multi-Signature_AdobeValidation.pdf, multi-Signature_Base.pdf, 
> multi-Signature_pdfBox_validation.pdf, screenshot-1.png
> To support Long Term Validation of a signature, we need to add a 
> Valdiation-Dictionary to the document. Inside there is most importantly an 
> OCSP-Response of the signers. (can be multiple).
> As Defined in [PAdES 4|https://en.wikipedia.org/wiki/PAdES] the following 
> elements will be added to a document: A DSS (Document Security Store) linked 
> to the VRI(s) of the signature(s)
> At first I will provide an example.

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