武田 圭史 ( タケダ ケイジ )

Takeda, Keiji

写真a

所属(所属キャンパス)

環境情報学部 ( 湘南藤沢 )

職名

教授

 

著書 【 表示 / 非表示 】

  • ネットワーク侵入解析ガイド―侵入検知のためのトラフィック解析法

    武田 圭史, 2001年

  • ネットワーク侵入検知

    武田 圭史, 2000年

  • Java プログラミングハンドブック

    武田 圭史, 1998年

  • Java プログラミングハンドブック2

    武田 圭史, 1997年

論文 【 表示 / 非表示 】

  • Unmanned aerial vehicles as a useful tool for investigating animal movements

    Iwamoto M., Nogami S., Ichinose T., Takeda K.

    Methods in Ecology and Evolution 13 ( 5 ) 969 - 975 2022年05月

     概要を見る

    Determining animal abundance is crucial for assessing the effectiveness of management measures against pest animals. Meanwhile, investigating animal movements has become important for conducting abundance estimations of unmarked animals since the random encounter model (REM) was published. REM is a camera trapping method that derives animal density by using contact ratio between camera traps and targeted animals that randomly move at a certain speed in a given area. However, it requires an independent value, which is animal speed. For investigating animal speed, camera traps with video recording and GPS tagging are the commonly used tools. Unmanned aerial vehicles (UAVs) are currently used in wildlife monitoring to investigate the abundance of target species. It is evaluated as a tool that is non-invasive and suitable for surveys in inaccessible landscapes. Considering these characteristics, we regarded a distant survey using this technology as suitable for investigating animal movements. Therefore, we proposed a method for estimating animal movements using UAVs and conducted a case study that aimed to investigate wild boars' movements. We collected 11 video samples that successfully followed the movements of wild boars from 26 UAV flights in total, and the average speed of their movements derived from all the samples was 1.54 km/24 hr. We found that issues can be improved, including species identification, video sample length, and animal behaviours or activity patterns. On the other hand, our method showed potential for applying to species with specific characteristics in their body size, shape or activity patterns. With improvements in the issues mentioned above, UAVs would become an alternative tool for investigating animal movements.

  • Encrypted Malicious Traffic Detection Based on Word2Vec

    Ferriyan A., Thamrin A.H., Takeda K., Murai J.

    Electronics Switzerland 11 ( 5 )  2022年03月

     概要を見る

    Network-based intrusion detections become more difficult as Internet traffic is mostly en-crypted. This paper introduces a method to detect encrypted malicious traffic based on the Transport Layer Security handshake and payload features without waiting for the traffic session to finish while preserving privacy. Our method, called TLS2Vec, creates words from the extracted features and uses Long Short-Term Memory (LSTM) for inference. We evaluated our method using traffic from three malicious applications and a benign application that we obtained from two publicly available datasets. Our results showed that TLS2Vec is promising as a tool to detect such malicious traffic.

  • Generating network intrusion detection dataset based on real and encrypted synthetic attack traffic

    Ferriyan A., Thamrin A.H., Takeda K., Murai J.

    Applied Sciences Switzerland 11 ( 17 )  2021年09月

     概要を見る

    The lack of publicly available up-to-date datasets contributes to the difficulty in evaluating intrusion detection systems. This paper introduces HIKARI-2021, a dataset that contains encrypted synthetic attacks and benign traffic. This dataset conforms to two requirements: the content require-ments, which focus on the produced dataset, and the process requirements, which focus on how the dataset is built. We compile these requirements to enable future dataset developments and we make the HIKARI-2021 dataset, along with the procedures to build it, available for the public.

  • ネットワーク通信情報の収集によるユーザ追跡

    上原雄貴,水谷正慶,武田圭史,村井純

    情報処理学会特集号社会活動を支える情報システム 53 ( 2 ) 461 - 473 2012年02月

    研究論文(学術雑誌), 単著, 査読有り

  • 情報空間における国際紛争と非対称性

    武田 圭史

    海外事情 59 ( 6 ) 30-39 2011年06月

    研究論文(学術雑誌), 単著

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研究発表 【 表示 / 非表示 】

  • Flash cookieの利用実態に関する調査

    武田 圭史

    [国内会議]  Computer Security Symposium 2010 (岡山) , 

    2010年10月
    , 

    口頭発表(一般)

  • 災害対策用クラウドコンピューティング環境構築における情報セキュリティの検討

    武田 圭史

    [国内会議]  Computer Security Symposium 2010 (岡山) , 

    2010年10月
    , 

    口頭発表(一般)

  • 電子メールヘッダの特徴情報を用いた標的型攻撃の検知

    梅田昂翔,上原雄貴,水谷正慶,武田圭史

    [国内会議]  Computer Security Symposium 2010 (岡山) , 

    2010年10月
    , 

    口頭発表(一般)

  • WindowsOS上での不正なファイルアクセスの検知・無効化処理における負荷低減手法

    武田 圭史

    [国内会議]  Computer Security Symposium 2010 (岡山) , 

    2010年10月
    , 

    口頭発表(一般)

  • セキュリティ意識向上のためのネットワーク通信視覚化ゲームの設計と実装

    武田 圭史

    [国内会議]  Computer Security Symposium 2010 (岡山) , 

    2010年10月
    , 

    口頭発表(一般)

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担当授業科目 【 表示 / 非表示 】

  • 情報セキュリティ論

    2026年度

  • 研究会A

    2026年度

  • 修士研究会

    2026年度

  • 特別研究プロジェクトA

    2026年度

  • 卒業プロジェクト2

    2026年度

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