Cryptanalysis of the convex hull click human identification protocol

Asghar, Hassan Jameel, Li, Shujun, Pieprzyk, Josef, & Wang, Huaxiong (2011) Cryptanalysis of the convex hull click human identification protocol. Lecture Notes in Computer Science : Information Security, 6531, pp. 24-30.

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Recently a convex hull based human identification protocol was proposed by Sobrado and Birget, whose steps can be performed by humans without additional aid. The main part of the protocol involves the user mentally forming a convex hull of secret icons in a set of graphical icons and then clicking randomly within this convex hull. In this paper we show two efficient probabilistic attacks on this protocol which reveal the user’s secret after the observation of only a handful of authentication sessions. We show that while the first attack can be mitigated through appropriately chosen values of system parameters, the second attack succeeds with a non-negligible probability even with large system parameter values which cross the threshold of usability.

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3 citations in Web of Science®

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ID Code: 70108
Item Type: Journal Article
Refereed: Yes
Additional Information: 13th International Conference, ISC 2010, Boca Raton, FL, USA, October 25-28, 2010, Revised Selected Papers
Keywords: Human Identification Protocols, Observer Attack
DOI: 10.1007/978-3-642-18178-8_3
ISSN: 0302-9743
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Springer Berlin Heidelberg
Deposited On: 11 Apr 2014 03:32
Last Modified: 17 Jul 2014 01:06

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