CAcert PDF Signer Author: philipp@cacert.org CAcert PDF Signer is based on iText from http://www.lowagie.com/iText/ This compiled version of PDF Signer requires Java 1.5. It is unknown, whether it is possible to run it on Java 1.4 The CAcert PDF Signer is a itext based commandline PDF signing application, which can be run automatically. It takes a PKCS#12 packaged certificate, a PDF file, and generates an output PDF file, which has the digital signature included. Run it: java sign Example: java sign my_private_key.pfx Password Secure_Web_Development.pdf output.pdf "Bin der Autor" "Wien"