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Paper 2004/257

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

Junghyun Nam, Seungjoo Kim, and Dongho Won

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.

Metadata
Available format(s)
PDF PS
Category
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
Keywords
Conference key distributionactive attackcolluding adversaries.
Contact author(s)
jhnam @ dosan skku ac kr
History
2004-12-07: last of 2 revisions
2004-10-08: received
See all versions
Short URL
https://ia.cr/2004/257
License
Creative Commons Attribution
CC BY
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