An anonymous key agreement protocol based on chaotic maps. (English) Zbl 1221.94057

Niu, Yujun; Wang, Xingyuan

Commun. Nonlinear Sci. Numer. Simul. 16, No. 4, 1986-1992 (2011).

Summary: Recently, Tseng et al. proposed a novel key agreement protocol based on chaotic maps. They claimed that the protocol achieved session key agreement between a server and a user, and allowed the user to anonymously interact with the server. This paper, however, will demonstrate that Tseng et al.’s protocol can not guarantee user anonymity and protocol security against an insider adversary who is a legal user, and it can not provide perfect forward secrecy. Furthermore, the current paper presents a new key agreement protocol based on Chebyshev chaotic map in order to conquer these problems. In contrast with Tseng et al.’s protocol, the proposed protocol is more secure and preserves user anonymity.

MSC:

94A60	Cryptography
37N99	Applications of dynamical systems

Keywords:

security; key agreement protocol; anonymity; public key cryptography; chaotic map

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