Cryptanalysis of the convex hull click human identification protocol


Autoria(s): Asghar, Hassan Jameel; Li, Shujun; Pieprzyk, Josef; Wang, Huaxiong
Data(s)

2011

Resumo

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.

Identificador

http://eprints.qut.edu.au/70108/

Publicador

Springer Berlin Heidelberg

Relação

DOI:10.1007/978-3-642-18178-8_3

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.

Direitos

Copyright 2011 Springer Berlin Heidelberg

Fonte

School of Electrical Engineering & Computer Science; Science & Engineering Faculty

Palavras-Chave #Human Identification Protocols #Observer Attack
Tipo

Journal Article