Hi, take a look at this online tool: http://easytimestamping.com
It is able to apply RFC3161 compliant trusted timestamps, issued by accredited Certification Authorities. The timestamp is applied to the pdf in detached mode (i.e. as a separate .tsr file) If you need to integrate the timestamping process in a python app, be patient, we will release an API and a command line version very soon. -- Marco Rucci securo.it -- http://mail.python.org/mailman/listinfo/python-list
