All About Digital Signatures, and their Certificates in PDFpen

PDFpen and PDFpenPro have the ability sign a document with a digital signature and validate digitally signed documents, starting in version 8. How is this “digital signature” different from the signatures supported in earlier versions of PDFpen, you ask? PDFpen and PDFpenPro already allowed you to sign documents, either by drawing a freehand signature with… Read More »