Learn how to add a digital signature to a PDF document in a console app using the Syncfusion .NET PDF Library. PDF documents can be digitally signed using x509 certificates such as .pfx files with private keys and support for hardware security module (HSM), online certificate status protocol (OCSP), certificate revocation list (CRL), and Windows Certificate Store to offer authenticity and integrity.

Product overview: https://www.syncfusion.com/document-processing/pdf-framework/net/pdf-library

Explore our tutorial videos: https://www.syncfusion.com/tutorial-videos

Example project: https://github.com/SyncfusionExamples/how-to-add-a-digital-signature-to-PDF-document-in-net