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Toward Non-parallelizable Client Puzzles

Tritilanunt, Suratose, Boyd, Colin A., Foo, Ernest, & Gonzalez Nieto, Juan M. (2007) Toward Non-parallelizable Client Puzzles. Cryptology and Network Security (LNCS), 4856, pp. 247-264.

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Abstract

Client puzzles have been proposed as a useful mechanism for mitigating denial of service attacks on network protocols. Several different puzzles have been proposed in recent years. This paper reviews the desirable properties of client puzzles, pointing out that there is currently no puzzle which satisfies all such properties. We investigate how to provide the property of non-parallelizability in a practical puzzle. After showing that obvious ideas based on hash chains have significant problems, we propose a new puzzle based on the subset sum problem. Despite some practical implementation issues, this is the first example that satisfies all the desirable properties for a client puzzle.

Impact and interest:

6 citations in Scopus
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12 citations in Web of Science®

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ID Code: 15210
Item Type: Journal Article
Keywords: Denial of Service Attacks, Client Puzzles, Non, Parallelizable Cryptographic Puzzles
DOI: 10.1007/978-3-540-76969-9_16
ISBN: 9783540769682
ISSN: 1611-3349
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > DATA FORMAT (080400) > Data Format not elsewhere classified (080499)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Institutes > Information Security Institute
Copyright Owner: Copyright 2007 Springer
Copyright Statement: This is the author-version of the work. Conference proceedings published, by Springer Verlag, will be available via SpringerLink. http://www.springer.de/comp/lncs/ Lecture Notes in Computer Science
Deposited On: 16 Oct 2008
Last Modified: 29 Feb 2012 23:34

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