Spam Mail Discrimination System Based on Behavior of DNS Servers Associated with URLs. - Shuji Suwa; Nariyoshi Yamai; Kiyohiko Okayama; Motonori Nakamura; Keita Kawano; Gada (SAINT, 2012)

E-Mail Priority Delivery System with Dynamic Whitelist in the Layer 3 Switch. - Gada; Nariyoshi Yamai; Kiyohiko Okayama; Keita Kawano; Motonori Nakamura (COMPSAC Workshops, 2013)

Design and Implementation of Client IP Notification Feature on DNS for Proactive Firewall System. - Tomokazu Otsuka; Gada; Nariyoshi Yamai; Kiyohiko Okayama; Yong Jin 001 (COMPSAC Workshops, 2015)