• PdfSigning

PDF signing

There are free programs available to create digital signatures with certificates on PDF documents:

Portable Signer

• GUI and commandline tool for Linux, OSX, and Windows

• http://portablesigner.sourceforge.net

CAcert PDF Signer

• Commandline tool only for Linux, OSX, and Windows

• http://svn.cacert.org/CAcert/Software/PdfSigner/

• Nautilus Script for PdfSigner: http://svn.cacert.org/CAcert/Software/PdfSigner/pdfsigner-nautilus.sh

OpenSignPDF

• Supports Smartcards and Timestamping

• http://opensignature.sourceforge.net/english.php :

Footprint

• PDF Writer and Signer
• Java 1.6+ library

• https://footprint.dev.java.net/

PDFCreator

• PDFCreator easily creates PDFs from any Windows program.Use it like a printer in Word, StarCalc or any other Windows application.

• http://pdfforge.org/products/pdfcreator

Misc

• Adobe´s documentation on PDF Security:

  • http://blogs.adobe.com/security/2007/04/acrobat_and_reader_security_do.html

• A new software, which I haven´t tested yet:

  • http://www.cabaret-solutions.com/de/downloads/linux

• OpenOffice feature request with voting:

  • http://qa.openoffice.org/issues/show_bug.cgi?id=47895