Michiharu Kudo  IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato-shi, Kanagawa-ken, 242-8502, Japan (kudojp.ibm.com). Dr. Kudo received B.E., M.E., and D.E degrees from the University of Tokyo in 1986, 1988, and 2002. He joined the IBM Tokyo Research Laboratory in 1988 and has worked on information security research. He is currently a manager of the Security and Privacy group at the IBM Tokyo Research Laboratory. Dr. Kudo has been a part-time lecturer at the Tokyo Institute of Technology since 2000. He is one of the founders of the XACML Technical Committee of the OASIS standardization body. His research interests include XML security, privacy protection, and access control technology.

Yoshio Araki  IBM Japan, Ltd., 2-12, Roppongi 3-chome, Minato-ku, Tokyo 106-8711, Japan (arakijp.ibm.com). Mr. Araki has been the Chief Privacy Officer of IBM Japan since October 2001. He received an M.S. degree in communication engineering from Osaka University and subsequently joined IBM Japan as a development engineer at the Fujisawa Development Laboratory. He worked on various products, including imaging devices, communication devices, host-to-PC communication software, and mobile network software. He moved to product planning in 1989 and did market planning in Raleigh, North Carolina, and Boca Raton, Florida from May 1990 to December 1992. After several management positions in development, he served as Asia Pacific marketing manager in mobile computing in 1997. He spent 1998 and 1999 in Strategy and Business Development of IBM's Asia Pacific Technical Operations to incubate security-related projects. From January 2000, he has worked as a marketing manager in Network and Systems Development.

Hiroshi Nomiyama  IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato-shi, Kanagawa-ken, 242-8502, Japan (nomiyamajp.ibm.com). Mr. Nomiyama joined the IBM Tokyo Research Laboratory in 1985 after receiving an M.S. degree from Kyushu University. He has been involved in Japanese-to-English machine translation, information retrieval, and text-mining projects. His research interests include natural language processing, text mining, and information visualization.

Shin Saito  IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato-shi, Kanagawa-ken, 242-8502, Japan (shinsajp.ibm.com). Mr. Saito received an M.S. degree in information science from the University of Tokyo in 2001 before joining the IBM Tokyo Research Laboratory. His research interests include Web accessibility and usability and static analysis of mark-up and programming languages.

Yukihiko Sohda  IBM Research Division, Tokyo Research Laboratory, 1623-14, Shimotsuruma, Yamato-shi, Kanagawa-ken, 242-8502, Japan (sohdajp.ibm.com). Dr. Sohda received B.S., M.S., and Ph.D. degrees from the Tokyo Institute of Technology in 1998, 2000, and 2003. Since joining the IBM Tokyo Research Laboratory, he has worked on Web Services caching. His research interests include high-performance parallel architectures, privacy management, and compliance management.