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動的マーキングを用いた効率的なネットワーク攻撃追跡手法の提案 A proposal of tracing method for distributed denial of service attacks using dynamic marking scheme ドウテキ マーキング オ モチイタ コウリツテキ ナ ネットワーク コウゲキ ツイセキ シュホウ ノ テイアン 古賀, 勝寛 コガ, カツヒロ Koga, Katsuhiro 古賀 コガ Koga 勝寛 カツヒロ Katsuhiro 90347047 岡崎, 直宣 オカザキ, ナオノブ Okazaki, Naonobu 岡崎 オカザキ Okazaki 直宣 ナオノブ Naonobu 宮崎大学 University of Miyazaki 古賀, 勝寛 コガ, カツヒロ Koga, Katsuhiro 古賀 コガ Koga 勝寛 カツヒロ Katsuhiro Distributed Denial of Service, IP traceback, traffic monitoring, IDS In recent years, DoS (Denial of Service) attack and more powerful DDoS (Distributed DoS) attack pose security problems on the Internet. As the measure to these attacks, it is important to trace attackers and stop the attacks. However, since information of the attacker is "spoofed", it is difficult to trace. Therefore, the method of specifying attackers is required. Savage et al. proposed a method to trace flooding attacks by "marked" packets. This method, however, has some problems gathering the attack packets through a lot of hops. In this paper, we propose a method to solve this problem by observing the feature of attack traffic and change the "marking probability" of the routers. We implement algorithms both of our proposed method and extending marking method to estimate the efficiency of them. From the results of some experiments, we will show the effectiveness of our proposed scheme. 宮崎大学工学部 Faculty of Engineering, University of Miyazaki 2009-09-30 jpn departmental bulletin paper VoR http://hdl.handle.net/10458/2432 https://miyazaki-u.repo.nii.ac.jp/records/2923 AA00732558 05404924 宮崎大学工学部紀要 Memoirs of Faculty of Engineering, University of Miyazaki 38 405 412 https://miyazaki-u.repo.nii.ac.jp/record/2923/files/KJ00005634499.pdf application/pdf 4.8 MB 2020-06-21