Verifying Digital Signatures

Table of Contents

Verifying Digital Signatures

The Viewer RI supports the viewing and validation of digital signatures. Users can use the signatures tab in the utility pane to view all the signatures that are defined in the PDF document. Users can also at any time right click on a signature annotation to view its properties.



Each root node in the signature tree has an icon states that can make it easy to get a quick idea of the signatures validity:

  • Signature is valid and the certificate chain could be validated against the users keystore.
  • Signature is valid but the certificate chain could not be validated.
  • Signature is invalid or the file has been modified since it was signed.
Signatures Tab in Utility Pane

Each annotation in a document can be viewed via the signature tree view on the signatures pane. Each node can be expanded to see more information about he signature. The root node can be right clicked to show the context menu:



  • Validate Signature validates the signature and shows a signature validation summary dialog.
  • Show Signature Properties opens a signatures properties dialog with extended signature information.
  • Go to Page navigates the page view to the page that the signature annotation is located on.
Signature Validation Dialog

The signature validation dialog shows summary information of the validation process.

Signature Summary Dialog

The signature summary dialog shows summary information of the signature diction, validity summary as well as information on the signers certificate.

Signature Annotation Context Menu

At any time an Signature Widget Annotation can be right clicked to show the content menu:

  • Show Certificate Properties opens the Certificate Properties dialog which show detail information of the certificates that make up the signatures certificate chain.
  • Show Signature Properties opens the Signature Summary dialog as mentioned above.
Certificate Properties Dialog

The signature summary dialog shows summary information of the signature diction, validity summary as well as information on the signers certificate.


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