CSS was held at TOYAMA International Conference Center on 26-28th October 2009 in Toyama, Japan. This years CSS symposium has the highest number of participants compared to past years. There were a total of 343 participants, out of which 176 presented in the symposium. Not only theoretical but also implementation contents were widely covered, and it seemed that there were increase in the number of demonstrators. In addition, each participant contributed to an experiment, in which statistical analysis was conducted distributing RFID tugs for implementing multi-party protocols which meet their privacy.