IWSEC is the first annual international conference held in Japan. The scope is all information security issue from theory on cryptology to security application or security management. There are about 120 attendees from Korea, China, Germany, Australia, Norway, UK, US, Finland, Netherlands, Japan, etc. Papers are classified into two sessions of regular papers and short paper. Regular papers are published in LNCS of Springer-Verlag. The next IWSEC 07 will be held in Nara.