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Digital Signature and Timestamp to PDF Documents with iTextSharp

Today, I just finished a bid(project) from RAC, that is “Digital Signature and Timestamp to pdf document with iTextSharp”.
the requirement is:

PDF Sign and TimeStamp

Provide a fully functional desktop application and source code that can:
Sign a PDF file from user certificate (.pfx)
Add timestamp (RFC 3161) from designated TSA
Save signed pdf in designated file
File can be verified with Adobe Acrobat Reader
Support for multiple signatures

Written in C# using open source libraries Itextsharp and Bouncycastle

App similar to http://www.codeproject.com/useritems/Esignature.asp
but with timestamp capability

Similar JAVA apps available as open source but prefer native C# app.

screenshot.jpg
reference:

      http://security.polito.it/ts/
      http://www.codeproject.com/useritems/Esignature.asp

9 thoughts on “Digital Signature and Timestamp to PDF Documents with iTextSharp”

  1. Mr RubyPDF,
    You can share the source code of this app (Digital Signature and Timestamp to PDF Documents with iTextSharp) ?
    where can i download it?

  2. Hi,
    could you share your source code for timestamping with ItextSharp?
    Thanks for your help

    Henri

  3. Hello RubyPDF,

    Could you share your source code for timestamping with ItextSharp?

    I cannot find the link for this example.

    Victor

  4. hello,
    I am also interested.
    I managed to generate PDF and sign it. Now I’d like to introduce the time stamp.

    thankss

  5. Hello, i need to sign pdf with timestamp. How can i download your example? or can you email me? thanks a lot.

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