Add LTV on Digitally Signed pdf X509 Certificates.

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DynamicPDF CoreSuite for .NET (v10) Forum

We are digitally signing pdf using X509 digital signing certificate from smart card/ hardware key. How to add LTV to those digitally signed pdf.  Is there any methods available from dynamic pdf .net core suit.
Posted by a ceTe Software moderator
Hello,

Enabling the timestamping with a valid certificate will make the signature LTV. You can refer to the documentation on adding time stamps to signatures and certificates here.  Also below is a code sample.

            Document document = new Document();
            Page page = new Page();
            // Create & add Signature Form Field
            Signature signature = new Signature("SigField", 10, 10, 250, 100);
            page.Elements.Add(signature);
            document.Pages.Add(page);
            Certificate certificate = new Certificate(@"Path for valid certificate", "password");
            document.Sign("SigField", certificate, true);
            string pdfFilePath = @"Path to save the PDF";
            document.Draw(pdfFilePath);

Thanks,
ceTe Software Support Team

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