Enhanced of key agreement protocols resistant to a denial-of-service attack

Authors:
Min-Shiang Hwang;Jung-Wen Lo;Chia-Hsin Liu
Affiliations:
Department of Management Information System, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402, R.O.C.;Department of Information Management, National Taichung Institute of Technology, 129 Sec. 3, San-min Rd., Taichung, Taiwan 404, R.O.C.;Graduate Institute of Networking and Communication Engineering, Chao Yang University of Technology, 168 Gifeng E. Rd., Wufeng, Taichung County, Taiwan 413, R.O.C.
Venue:
Fundamenta Informaticae
Year:
2003

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Abstract

The denial-of-service attack, a malicious client executes a key agreement protocol simultaneously many times to exhaust the server's memory or computing resource and to interfere the honest client connecting with the server. It is a serious problem in the key agreement protocol. A key agreement protocol which resists to the storage-exhaustion and the CPU-exhaustion attack was firstly proposed by Hiros-Matsuura. However, their protocol is not efficient enough during the weak key validation. Our proposed protocol modifies the weak key validation and avoids the unnecessary heavy computation to enhance the resistance of the denial-of-service attack. The most important contributions of our protocol are not only efficiently to resist CPU-exhaustion and memory-exhaustion attacks but also prevent bandwidth consumption.