Introduction of Evangelists

Security Master/Chief Security Scientist Katsumi Takahashi
  • Security Master/Chief Security Scientist

    Katsumi Takahashi

    He studies information security and is interested in security problems related to big data/IoT, specifically with privacy concerns. He has developed systems including secure multi-party computation, personal-data anonymization, "Fine-grained encryption", "Cloud-managed-key Cryptographic Scheme", "privango" with NTT cryptography research team. Since he has joined NTT, he has been studying information processing technology. In the early days of World-Wide Web, he performed pioneering works on location-based search engines "i-Townpage", "Mobile Info Search", "kokono Search", and so on. He also contributes as a mediator between technology areas and social system areas, and worked for revising Japanese personal information protection law in 2015. Chief Security Scientist of NTT Social Informatics Laboratories. Security Master. Ph.D.

    Books

    • Efficient Secure Three-Party Sorting with Applications to Data Analysis and Heavy Hitters (CCS 2022: 125-138, Hiroki Hamada, Dai ikarashi, Ryo Kikuchi, Katsumi Takahashi, Junichi Tomita, Gilad Asharov Bar-Ilan University, Ariel Nof Technion, Benny Pinkas Bar-Ilan University)
    • Anonymization and Utilization of Personal Data (Seibunsha, 2017, Ryota Osumi, Katsumi Takahashi)
    • Zipf Distribution Model for Quantifying Risk of Re-identification from Trajectory Data (Journal of Information Processing Vol. 24 No. 5, pp. 816-823, 2016, Hiroaki Kikuchi, Katsumi Takahashi)
    • Proposal and Implementation Evaluation of Error-Detectable Lightweight Three-Party Secure Function Calculation (IPSJ Transactions on Information Processing, Vol. 52, No. 9, pp. 2674-2685, 2011, Hiroshi Chida, Dai ikarashi, Hiroki Hamada, Katsumi Takahashi)
    • Geo-word centric association rule mining (International Conference on Mobile Data Management, pp. 273-280, 2005, Katsumi Takahashi, Iko Pramudiono, Masaru Kitsuregawa)
    • Experiments on query expansion for Internet yellow page services using Web log mining (International Conference on Very Large Data Bases (VLDB), pp. 1008-1018, 2002, Yusuke Ohura, Katsumi Takahashi, Iko Pramudiono, Masaru Kitsuregawa)
    • Mobile Information Retrieval (Tokyo Denki University Publishing, Intellectual Information Technology Information Retrieval and Agents on the Internet, Chapter 4, pp. 85-112, 2002, Katsumi Takahashi)
    • Collection, Structuring, and Retrieval Methods for Location-Oriented Information (IPSJ Transactions on Information Processing, Vol. 41, No. 7, pp. 1987-1998, 2000, Seiji Yokomichi, Katsumi Takahashi, Nobuyuki Miura, Kenichi Shima)
    • Integration of Structured Information Directory with Heterogeneous and Distributed Information -Information Integration Directory- (IEICE Transactions on Electronics, Vol. J81-D1 No. 5, pp. 443-450, 1998, Katsumi Takahashi, Nobuyuki Miura, Yoshiyasu Nishibe, Kenichi Shima)
    • Approximate String Matching Method Based on Kana Variations in Personal Names (IPSJ Transactions on Information Processing, Vol. 36, No. 8, pp. 1906-1915, 1995, Katsumi Takahashi, Kyoji Umemura)

    Awards

    • 2023 IPSJ Achievement Award
    • 2017 IPSJ 2016 Best Paper Award
    • 2017 SCIS Innovation Paper Award
    • 2016 IPSJ Fellow
    • 2016 NTT Security Master
    • 2012 IPSJ 2011 Best Paper Award
    • 2001 IPSJ 2000 Best Paper Award

    Academic Society Officers, etc.

    • 2021- Member, Next-Generation Medical Infrastructure Law Working Group, Cabinet Office
    • 2021- Member, Study Group on the Utilization and Privacy Protection of Viewing Data in the Broadcasting Field, Ministry of Internal Affairs and Communications
    • 2021- Member, Working Group on the Handling of User Information in Platform Services, Ministry of Internal Affairs and Communications
    • 2015-2016 Member, Privacy Protection Task Force Considering Amendments to the Personal Information Protection Act, Ministry of Internal Affairs and Communications
    • 2014-2015 Member, Study Group on the Handling of Location Information in Emergencies, Ministry of Internal Affairs and Communications
    • 2014-2015 Advisory Committee Member, Multi-Stakeholder Process for Infrastructure Development on Informationization and Serviceization of the Japanese Economy and Society - Investigation Project on the Utilization of Personal Data, Ministry of Economy, Trade and Industry
    • 2014- Member, Information Security Advisory Board, Ministry of Internal Affairs and Communications, General Working Group
    • 2013-2015 Board Member, Information Processing Society of Japan
    • 2013-2014 Member, Technical Study Group of the Personal Data Study Group, Cabinet Secretariat
    • 2012-2013 Member, Research Group on the Use and Distribution of Personal Data, Ministry of Internal Affairs and Communications
    • 2010-2013 Standard Officer, Information Processing Society of Japan, Information Standards Survey Committee
    • 2009 General Chair, Computer Security Symposium 2009

    Visiting Professors, etc.

    • 2022- Special Professor, National Institute of Informatics
    • 2021-2022 Research Fellow, National Institute of Informatics
    • 2016-2021 Visiting Professor, National Institute of Informatics
    • 2011-2016 Visiting Professor, Graduate School of Systems and Information Engineering, University of Tsukuba
    • 2011 Part-time Lecturer, Faculty of Social Systems Science, Chiba Institute of Technology
    • 2010 Part-time Lecturer, Graduate School of Engineering, Toyohashi University of Technology

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