The 4th COE Postdoctoral and Doctoral Researchers
Technical Presentation

Date: Thursday, July 22, 2004
Time: 13:30 - 14:30
Place: L1 Lecture room
Language: English (oral presentation), English/Japanese (question)

Program (20 mins each: 15 mins presentation and 5 min discussion)

  1. "Protecting Software by Instruction Camouflage"
    神崎 雄一郎 ( ソフトウェア工学講座 : D2 )
    Yuichiro Kanzaki ( Software Engineering Lab. : D2 )

    [Abstract]
    I will be talking about a method to protect software against the code analysis, by instruction camouflage. Our method first overwrites the original instructions with dummy instructions. Then, the binary program restores the original instructions within a certain period of execution, by autonomously replacing the dummy instructions with the original ones. This drastically increases the complexity of the code analysis, since the analysis fails if the dummy instructions are inspected as they are. The number of camouflaged instructions can be tuned by taking protection-performance tradeoff into account.
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  2. "Automatic Location System using Active IR-tag"
    坂田 宗之 ( 像情報処理学講座 : D2 )
    Muneyuki Sakata ( Image Processing Lab. : D2 )

    [Abstract]
    In many cases, we work in a group, and to know the situation each other, for example "where he/she is?" or "Is he/she busy now?", is necessary for collaborative work. In my project, I'll construct the system named "ALTAIR" which automatically detect and tracks the location of the users. The system uses wireless network, the combination of IR(Infra-Red)-tags which the user has and wide angle cameras. In this presentation, I introduce my approach, system, and plan of my research.
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  3. "The deployment and the initial result of the Internet-Based Augmentation System for Global Navigation Satellite Systems"
    戸邉 論 ( 情報科学センター : D2 )
    Osamu Tobe ( Information Technology Center : D2 )

    [Abstract]
    Global Navigation Satellite Systems (GNSS) is effective in locating mobile nodes. However, GNSS has limits on accuracy due to various error factors. In order to enhance the accuracy, it is necessary to send the error correction data to these nodes. This data is based on the electric wave data, which is observed at reference stations, from some satellites. The position of reference stations has been determined with high accuracy.
    I have proposed the Internet-Based Augmentation System for GNSS (IBAS) which collects the observation data of the electric wave from satellites, generates and provides the error correction data on the Internet. And I have already established the IBAS, which consists of five reference stations around the Tokyo bay, and one reference station located at NAIST.
    In this presentation, I talk about the system architecture and the deployment of IBAS. The result of pilot study for our proposal system is also referred. In conclusion, we consider the enhancement of the IBAS.
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NAIST Graduate School of Information Science 21st Century COE Program