Replay Attacks on Han et al.’s Chaotic Map Based Key Agreement Protocol Using Nonce

  • Eun-Jun Yoon
  • Kee-Young Yoo
Part of the Communications in Computer and Information Science book series (CCIS, volume 15)


In 2008, Han et al. proposed two key agreement protocols based on chaotic maps; timestamp based protocol and nonce based protocol. The current paper, however, demonstrates the vulnerability of Han et al.’s nonce based key agreement protocol to replay attacks.


Cryptanalysis Key agreement Chaotic maps Protocol Nonce 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Eun-Jun Yoon
    • 1
  • Kee-Young Yoo
    • 2
  1. 1.School of Electrical Engineering and Computer ScienceKyungpook National UniversityDaeguSouth Korea
  2. 2.Department of Computer EngineeringKyungpook National UniversityDaeguSouth Korea

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