Defending web services against denial of service attacks using client puzzles

Suriadi, Suriadi, Stebila, Douglas, Clark, Andrew, & Liu, Hua (2011) Defending web services against denial of service attacks using client puzzles. In Foster, Ian, Moser, Louise, & Zhang, Jia (Eds.) 2011 IEEE 9th International Conference on Web Services, IEEE Computer Society, Washington, D.C, pp. 25-32.

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The interoperable and loosely-coupled web services architecture, while beneficial, can be resource-intensive, and is thus susceptible to denial of service (DoS) attacks in which an attacker can use a relatively insignificant amount of resources to exhaust the computational resources of a web service. We investigate the effectiveness of defending web services from DoS attacks using client puzzles, a cryptographic countermeasure which provides a form of gradual authentication by requiring the client to solve some computationally difficult problems before access is granted. In particular, we describe a mechanism for integrating a hash-based puzzle into existing web services frameworks and analyze the effectiveness of the countermeasure using a variety of scenarios on a network testbed. Client puzzles are an effective defence against flooding attacks. They can also mitigate certain types of semantic-based attacks, although they may not be the optimal solution.

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12 citations in Scopus
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ID Code: 43667
Item Type: Conference Paper
Refereed: Yes
Keywords: web services, denial of service, client puzzles, web services security
DOI: 10.1109/ICWS.2011.22
ISBN: 9780769544632
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > COMPUTER SOFTWARE (080300) > Computer System Security (080303)
Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > DISTRIBUTED COMPUTING (080500) > Web Technologies (excl. Web Search) (080505)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Institutes > Information Security Institute
Copyright Owner: Copyright 2011 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 27 Jul 2011 00:49
Last Modified: 27 Jul 2011 22:08

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