• Title/Summary/Keyword: Blom′s scheme

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MULTIPARTY KEY AGREEMENT PROTOCOL BASED ON SYMMETRIC TECHNIQUES

  • Lee, Hyang-Sook;Lee, Young-Ran;Lee, Ju-Hee
    • Communications of the Korean Mathematical Society
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    • v.18 no.1
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    • pp.169-179
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    • 2003
  • In this paper, we propose multiparty key agreement protocols by generalizing the Blom's scheme based on 2 variable polynomials. Especially we develop three party and four party key agreement schemes with security. The advantage of the new schemes is to have small demands on storage space.

A Group Key based Authentication Protocol Providing Fast Handoff in IEEE 802.11 (IEEE 802.11 환경에서 빠른 핸드오프를 제공하는 그룹키 기반의 인증 프로토콜)

  • Lee, Chang-Yong;Kim, Sang-Jin;Oh, Hee-Kuck;Park, Choon-Sik
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.18 no.5
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    • pp.103-113
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    • 2008
  • Reducing handoff latency is essential in providing seamless multimedia service in Wireless LAN based on the IEEE 802.11 standard. Reducing authentication delay is critical in reducing handoff latency. To this end, several authentication protocols for fBst handoff have been proposed. Mishra et al. used proactive key distribution to improve the authentication delay incurred in the current standard and Park et al. proposed a new authentication protocol based on Blom's key pre-distribution scheme. In this paper, we propose an enhanced authentication protocol based on Bresson et al.'s group key protocol. If a mobile node has previously access the network, our proposed protocol only requires simple hash operations in providing mutual authentication between a mobile node and access points. Our protocol is more efficient than Park et al.'s and Mishra et al.'s technique can be used in our protocol to further enhance our protocol.