A signature is used to prove that a PDF has not been changed since the signature was applied. In addition, it is now possible to encrypt a PDF with PDFSign-CL, to provide it with a password and to restrict access. PDFSign-CL thus offers all functions to protect PDFs from manipulation and to enable proof of … Continued
PDF/A and ZUGFeRD
PDFSign ensures that the PDF / A or ZUGFeRD conformity is maintained even when applying the (visible) signature.