Hallo zusammen, sofern nicht selber schon gesehen/-lesen hier [0] bzw. [1] FYI "How to break PDF Signatures" --> If you open a PDF document and your viewer displays a panel (like you see below) indicating that the document is signed by [email protected] and the document has not been modified since the signature was applied You assume that the displayed content is precisely what [email protected] has created. During recent research, we found out that this is not the case for almost all PDF Desktop Viewers and most Online Validation Services. ==> Nutze ich einen aktuell verwundbaren Desktop Client ja/nein - siehe [2] VG Bernd [0] https://www.pdf-insecurity.org/ [1] https://www.pdf-insecurity.org/signature/signature.html [2] https://www.pdf-insecurity.org/signature/viewer.html -- Bernd Kohler IT Center Abteilung: Netze RWTH Aachen University Wendlingweg 10 52074 Aachen Tel: +49 241 80-29793 Fax: +49 241 80-22666 kohler@itc.rwth-aachen.de https://www.itc.rwth-aachen.de