Aspose PDF Digital Signing

[suman.bhattacharya]

Hi

I am trying to add a digital certificate in to a PDF file using Aspose PDF. Everything seems to work as expected only one issue I am having. When I am trying to open the certificate in the PDF file, it is showing the "Signature Validity is UNKNOWN".

Is there anyway I can set the validity in code?

Regards

Suman

[tilal.ahmad]

Hi Suman,

Thank you for your inquiry. Aspose.Pdf for .NET does provide a feature to add digital signature and verify the validity of the signature as well. Please see the following documentation link for more details and sample code.

• Encrypt PDF File
• Decrypt PDF File
• Control Exception PDF File
• Change Password of PDF File
• Set Privileges on PDF

Please feel free to contact us for any further assistance.

Best Regards,