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Open AccessArticle

A Round-Efficient Authenticated Key Agreement Scheme Based on Extended Chaotic Maps for Group Cloud Meeting

Department of Computer Science and Information Engineering, National Chin-Yi University of Technology, No.57, Sec. 2, Zhongshan Rd., Taiping District, Taichung 41170, Taiwan
Department of Medical Informatics, Tzu Chi University, No.701, Sec. 3, Zhongyang Rd., Hualien 97004, Taiwan
Author to whom correspondence should be addressed.
Sensors 2017, 17(12), 2793;
Received: 30 October 2017 / Revised: 29 November 2017 / Accepted: 30 November 2017 / Published: 3 December 2017
(This article belongs to the Special Issue Selected Papers from IEEE ICICE 2017)
The security is a critical issue for business purposes. For example, the cloud meeting must consider strong security to maintain the communication privacy. Considering the scenario with cloud meeting, we apply extended chaotic map to present passwordless group authentication key agreement, termed as Passwordless Group Authentication Key Agreement (PL-GAKA). PL-GAKA improves the computation efficiency for the simple group password-based authenticated key agreement (SGPAKE) proposed by Lee et al. in terms of computing the session key. Since the extended chaotic map has equivalent security level to the Diffie–Hellman key exchange scheme applied by SGPAKE, the security of PL-GAKA is not sacrificed when improving the computation efficiency. Moreover, PL-GAKA is a passwordless scheme, so the password maintenance is not necessary. Short-term authentication is considered, hence the communication security is stronger than other protocols by dynamically generating session key in each cloud meeting. In our analysis, we first prove that each meeting member can get the correct information during the meeting. We analyze common security issues for the proposed PL-GAKA in terms of session key security, mutual authentication, perfect forward security, and data integrity. Moreover, we also demonstrate that communicating in PL-GAKA is secure when suffering replay attacks, impersonation attacks, privileged insider attacks, and stolen-verifier attacks. Eventually, an overall comparison is given to show the performance between PL-GAKA, SGPAKE and related solutions. View Full-Text
Keywords: cloud meeting; group authenticated; key agreement; extended chaotic maps cloud meeting; group authenticated; key agreement; extended chaotic maps
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Lin, T.-H.; Tsung, C.-K.; Lee, T.-F.; Wang, Z.-B. A Round-Efficient Authenticated Key Agreement Scheme Based on Extended Chaotic Maps for Group Cloud Meeting. Sensors 2017, 17, 2793.

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