Cryptanalysis of Group Key Agreement Protocol Based on Chaotic Hash Function

Eun-Jun YOON  Kee-Young YOO  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E94-D   No.11   pp.2167-2170
Publication Date: 2011/11/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E94.D.2167
Print ISSN: 0916-8532
Type of Manuscript: Special Section LETTER (Special Section on Information and Communication System Security)
Category: 
Keyword: 
cryptanalysis,  key agreement,  chaotic maps,  hash function,  Chebyshev map,  

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Summary: 
In 2010, Guo and Zhang proposed a group key agreement protocol based on the chaotic hash function. This letter points out that Guo-Zhang's protocol is still vulnerable to off-line password guessing attacks, stolen-verifier attacks and reflection attacks.