@techreport{weko_157694_1, author = "NM,Sahri and Koji,Okamura", title = "Collaborative Spoofing Detection and Mitigation - SDN based looping authentication for DNS services", year = "2016", institution = "Graduate School of Information Science and Electrical Engineering Kyushu University, Research Institute for Information Technology Kyushu University", number = "9", month = "feb" }