Introduction of Sakurai Lab.

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Introduction of Sakurai Lab.

• Kyushu Univ. JAPAN

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ITSLAB (Information Technology Security
Laboratory)
Address Department of Computer Science and
Communication Engineering, Kyushu University,
6-10-1 Hakozaki, Higashi-ku, Fukuoka, Fukuoka
812-8581, Japan
This building
Kyushu Univ.
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Topics of Researches

• Design of Secure Protocols
• Key-Exchange Protocol with ID protection
  (One-time ID)
• Fair-Exchange Protocol for E-contract
• Secure Data Mining
• Design of Secure Systems
• Anonymity in Peer-to-Peer Network
• Privacy of RFID
• Combine ID-based Cryptography to PKI
• Anti-SPAM
• Tools for Enhanced Computer Security
• Software Obfuscation
• Secure OS
• Tools for Enhanced Network Security
• Information Visualization to detect malicious
  behavior
• Detection of Port-Scan

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Key-Exchange Protocol

• Establish a short-term key to achieve integrity
  and/or secrecy of following transaction

In most existing works,

• Leakage of Users ID, DoS attack

• Our approach introduce One-time ID

• Disposable ID used as substitution of (fixed)
  user's identity

How to manage One-time ID ? model privacy and
DoS-resiliency ?
Shared Secret
Shared Secret
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Research of Secure RFID(Radio-Frequency
Identification)

• RFID tag is a small and inexpensive microchip
  that emits an identifier in response to query
  from nearby reader
• Contactless physical-access cards
• Automated toll payment
• Inventory tags

• Privacy concern (linkability, traceability)
• We solve it by using universal re-encryption to
  change information on RFID tags frequently
• Improve a protocol proposed by Golle et al.
  (2004) to provide location privacy, and integrity
  of messages

price of the suit
shoe size
?? yen in wallet
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Privacy Preserving Data Mining

• Data Mining
• To discover some meaningful predictive
  information from large volumes of data
• Technical challenge
• Collaboration of different distributed parties
  without revealing private data
• We have developed accurate model without access
  to precise information in data records
• Privacy-preserving two-party K-mean clustering
  using cryptographic techniques without trusted
  third party

Large Databases
Valuable knowledge found!!
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Collaborations

• ISIT, 2nd Laboratory, Japan
• Center of Information Security Technology (CIST),
  Korea Univ., Korea
• Chungnam Univ., Korea
• Gwangju Institute of Science and Technology
  (GIST), Korea
• Okayama Univ., Japan
• Kyushu Institute Univ., Japan
• Institute for InfocommResearch (I2R), Singapore

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SSR Project (http//www.iisf.or.jp/SSR/)

• Purpose
• Investigation and research of security function
  of operating system
• Member
• Sakurai Lab. (Kyushu University)
• In cooperation with GIST, Korea
  http//nwcl.gist.ac.kr/seecure/index.html
• Corporation members
• Fujitsu, Hitachi, IBM, Toshiba, Toshiba Solution

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Invited Researchers (2004-2005)

• CIST members
• Prof. Jongin Lim, Prof. Donghoon Lee, Yong Ho
  Kim, Jeong Jae Yu, Tae Hyun Kim, Hwa Yean Lee,
• GIST members
• Jongyoul Park, Wook Shin, Hyung Chan Kim, Hyunjin
  Yoo, Jiho Cho
• Prof. Man Young Rhee (Kyung Hee Univ.)
• Prof. Mridul Nandi (Indian Statistical Institute)
• Prof. Hyang-Sook Lee (Ewha Womans Univ.)
• Dr. Guilin Wang (I2R)

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http//itslab.csce.kyushu-u.ac.jp
Website of ITSLAB