Detecting mass-mailing worm infected hosts by mining DNS traffic data. - Keisuke Ishibashi; Tsuyoshi Toyono; Katsuyasu Toyama; Masahiro Ishino; Haruhiko Ohshima; Ichiro Mizukoshi (MineNet, 2005)

Measurement of DNS Traffic Caused by DDoS Attacks. - Keisuke Ishibashi; Tsuyoshi Toyono; Hirotaka Matsuoka; Katsuyasu Toyama; Masahiro Ishino; Chika Yoshimura; Takehiro Ozaki; Yuichi Sakamoto; Ichiro Mizukoshi (SAINT Workshops, 2005)

2-D Bitmap for Summarizing Inter-Host Communication Patterns. - Keisuke Ishibashi; Tatsuya Mori; Ryoichi Kawahara; Katsuyasu Toyama; Shunichi Osawa; Shoichiro Asano (SAINT Workshops, 2007)

Method of Measuring VoIP Traffic Fluctuation with Selective sFlow. - Atsushi Kobayashi; Katsuyasu Toyama (SAINT Workshops, 2007)