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A Weakness in Jung-Paeng-Kim's ID-based Conference Key Distribution Scheme

Authors:
Junghyun Nam
Seungjoo Kim
Dongho Won
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URL: http://eprint.iacr.org/2004/257
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Abstract: Very recently, Jung, Paeng and Kim [IEEE Communications Letters, Vol 8, No 7, pp 446--448, July 2004] have demonstrated the insecurity of Xu and Tilborg's ID-based conference key distribution scheme, and in addition, have revised the scheme to fix the security flaws discovered by them. However, in this paper, we show that Jung-Paeng-Kim's revised scheme is still insecure since it is vulnerable to an active attack of colluding adversaries. We also show that our attack can be easily thwarted by a simple patch.
BibTeX
@misc{eprint-2004-12225,
  title={A Weakness in Jung-Paeng-Kim's ID-based Conference Key Distribution Scheme},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols / Conference key distribution; active attack; colluding adversaries.},
  url={http://eprint.iacr.org/2004/257},
  note={ jhnam@dosan.skku.ac.kr 12759 received 5 Oct 2004, last revised 7 Dec 2004},
  author={Junghyun Nam and Seungjoo Kim and Dongho Won},
  year=2004
}