Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Tseng, Yuh‐Min
Affiliations: Department of Mathematics, National Changhua University of Education, Jin‐De Campus, Chang‐Hua City, Taiwan 500, R.O.C., e‐mail: tymy@ms45.hinet.net, ymtseng@cc.ncue.edu.tw
Abstract: Recently, Tzeng proposed a provably secure and fault‐tolerant conference‐key agreement protocol. It requires only a constant number of rounds to establish a conference key among all honest participants. This article will show that Tzeng's protocol does not offer forward secrecy. We say that a conference‐key agreement protocol offers forward secrecy if the long‐term secret key of any participant is compromised and will not result in the compromise of the previously established conference keys. This property is important and has been included in most key agreement protocols and standards. In this paper, an improvement based on Tzeng's protocol is proposed and it achieves forward secrecy. Under the Diffie–Hellman decision problem assumption and the random oracle model, we show that the proposed protocol can withstand passive attacks and is secure against impersonator's attacks. The improved protocol requires a constant number of rounds to compute a conference key. The improved protocol provides fault‐tolerance.
Keywords: forward secrecy, fault tolerant, key agreement
Journal: Informatica, vol. 16, no. 2, pp. 275-284, 2005
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
sales@iospress.com
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
info@iospress.nl
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office info@iospress.nl
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
china@iospress.cn
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
如果您在出版方面需要帮助或有任何建, 件至: editorial@iospress.nl