Speeding up X.509 Certificate Path Validation. - Shingo Hane; Takahiro Fujishiro; Yoko Hashimoto; Tadashi Kaji; Kondo Katsuhiko; Satoru Tezuka (IWAP, 2005)

A Proposal of TLS Implementation for Cross Certification Model. - Tadashi Kaji; Takahiro Fujishiro; Satoru Tezuka (IEICE Trans. Inf. Syst., 2008)

Development of Hi-Speed X.509 Certification Path Validation System. - Takahiro Fujishiro; Akane Sato; Yoko Kumagai; Tadashi Kaji; Kenichi Okada 002 (AINA Workshops, 2010)

Security Introduction Framework for Operational Technologies and Applying to Industrial Control System. - Tsutomu Yamada; Toshihiko Nakano; Tadashi Kaji; Shun'ichi Tano (SICE, 2020)

Verification of the Effectiveness to Monitor Darknet across Multiple Organizations. - Katsuya Nishijima; Takao Kondo; Tatsumi Hosokawa; Tomohiro Shigemoto; Nobutaka Kawaguchi; Hiroyuki Hasegawa; Hideyuki Honda; Yasuhito Suzuki; Tadashi Kaji; Osamu Nakamura (CANDAR (Workshops), 2021)