研究者業績
Profile Information
- Affiliation
- University of Hyogo
- Degree
- 博士（工学）(Mar, 2007, 九州大学)
- Contact information
- toshi
gsis.u-hyogo.ac.jp - J-GLOBAL ID
- 202101019342165016
- researchmap Member ID
- R000015855
Research Interests
5Research Areas
1Research History
7-
Apr, 2021 - Present
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Jun, 2016
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Apr, 2010
Education
2-
Apr, 1984 - Mar, 1986
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Apr, 1980 - Mar, 1984
Committee Memberships
14-
Apr, 2013 - Present
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Feb, 2018 - Apr, 2020
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Jun, 2014 - May, 2015
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Jun, 2014 - May, 2015
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Apr, 2003 - Mar, 2015
Awards
14-
Sep, 2020
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Jan, 2020
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Jun, 2019
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Sep, 2017
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Jun, 2016
Papers
100-
IEICE Trans. Inf. Syst., 97-D(1) 43-52, 2014 Peer-reviewed
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The 11th IEEE Int. Conference on Trust, Security and Privacy in Computing and Communications (TrustCom2012), 1755-1762, Jun, 2012 Peer-reviewed
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International Conference on Security and Cryptography (Secrypt2011), 362-369, 2011 Peer-reviewed
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Sixth International Conference on Availability, Reliability and Security(ARES), 442-447, 2011 Peer-reviewed
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The Journal of the Institute of Television Engineers of Japan, 64(12) 1921-1932, Dec 1, 2010In this paper, we present an authentication mechanism for ISDB-T broadcast streams, especially a One-Seg broadcast stream, which is suitable for low-power devices. Our method makes it possible to authenticate data streams at a low computational cost. The method requires a small memory for buffering to process the broadcast stream and is resistant to packet-loss. We evaluated the computational cost of our method by computer simulation and theoretical estimation, and we show here that our method achieved good properties for authenticating data streams broadcast through lossy channels, e.g. wireless channels. Furthermore, we developed a mobile phone that can authenticate One-Seg broadcast streams with our method, and we report the effectiveness of our scheme here.
Misc.
21-
2009 1-6, Oct 12, 2011
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Proceedings of the IEICE General Conference, 2010 139-139, Mar 2, 2010
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IEICE technical report, 109(114) 153-159, Jun 25, 2009Hash functions using stream ciphers as components perform fast on a variety of platforms. However, stream-cipher-based hash functions (SCHs) have not been studied sufficiently yet. In this paper, we present a model of SCHs consisting of two parts: a pre-computation phase and a stream cipher phase. We apply this model to existing broken SCHs, Abacus and Boole, and analyze the vulnerabilities corresponding to existing attacks for each part of our model. By applying our model to these algorithms, weak parts in the algorithms are revealed, and we show that these vulnerabilities can be removed by minor modifications to each part. Furthermore, we clarify the requirements for the pre-computation phase and the stream cipher phase to realize secure SCHs.
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Proceedings of the IEICE General Conference, 2009 177-177, Mar 4, 2009
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Proceedings of the IEICE General Conference, 592-592, 2008
Presentations
9Teaching Experience
1-
Oct, 2007 - Mar, 2012ICT security (Toyo University)
Research Projects
1-
科学研究費助成事業, 日本学術振興会, Apr, 2022 - Mar, 2025