Hi Oliver, Oliver Brinzing wrote > you added a new file into the zip package *after* signing the document. Yeah, thats correct. Oliver Brinzing wrote > [...] LO checks all files inside the zip package during opening > and if it finds a changed file or a file which is not listed in > "documentsignatures.xml" it will > invalidate the signature. Perhaps. As a result, LibreOffice does not only use the XML signatures but also checks additional things. Is that correct? Regards Steve -- Sent from: http://document-foundation-mail-archive.969070.n3.nabble.com/Dev-f1639786.html _______________________________________________ LibreOffice mailing list LibreOffice@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/libreoffice