Adding a digital signature to a PDF using Java

Question

I want to digitally sign a PDF file using a certificate stored on a USB-token, HSM, etc. How do I use the private key stored on the USB token using JAVA?

Answer 1

To the iText self-reference, I'll add

• Gnostice
• DigiSigner
• Apache PDFBox (open source)
• Java4Less (open source, based on PDFBox)
• Adobe LiveCycle
• jPDFSecure
• Oracle Fusion