Journal
NONLINEAR DYNAMICS
Volume 74, Issue 1-2, Pages 419-427Publisher
SPRINGER
DOI: 10.1007/s11071-013-0979-4
Keywords
Authenticated key exchange; Three-party; Chebyshev polynomials; Security
Categories
Funding
- National Science foundation of China [61201180]
- Beijing Natural Science Foundation [4132055]
- Excellent Young Scholars Research Fund of Beijing Institute of Technology
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Three-party key agreement protocol is an important cryptographic mechanism for secure communication, which allows two parties authenticate each other with the help of a trusted server. Very recently, Lai et al.'s proposed a novel three-party key agreement protocol using the enhanced Chebyshev chaotic map and claimed their protocol could withstand various attacks. Unfortunately, in this paper, we will show their protocol is vulnerable to the privileged insider attack and the off-line password guessing attack. To solve the problems, we propose an improved three-party key agreement protocol using the enhanced Chebyshev chaotic map. Security analysis and performance analysis show our protocol not only could withstand various attacks, but also has similar performance. Therefore, it is very suitable for practical applications.
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