The effects of password length and reference profile size on the performance of a multivariate text-dependent typist verification system

Doug P Mahar; R D Henderson; W Laverty; R Napier

doi:10.1016/S0953-5438(98)00024-1

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Journal article

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The effects of password length and reference profile size on the performance of a multivariate text-dependent typist verification system

Doug P Mahar, R D Henderson, W Laverty and R Napier

Interacting with Computers, Vol.10(4), pp.375-383

1998

DOI: https://doi.org/10.1016/S0953-5438(98)00024-1

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Abstract

Information Systems

Design Practice and Management

Cognitive Sciences

computer security

typist verification

password length

The performance of Napier et al.'s typist verification algorithm (Keyboard user verification: toward an accurate, efficient, and ecologically valid algorithm, International Journal of Human-Computer Studies 43 (1995) 213-222) was assessed in a text-dependent setting. Twenty-nine subjects typed a 17 character password 50 times. False acceptance and false rejection rates were then calculated as the number of repetitions of the password included in the reference profile was increased from 6 to 20 and the number of digraphs from the password included in the verification process was increased from 2 to 16. The performance of the system (12% total error rate) was found to be comparable with the best results reported in other studies using text-dependent algorithms, and substantially better than that reported in studies using a text-independent paradigm with passwords of this length. The relationship between password length and reference profile size was found to conform to an exponential decay function, which accounted for 92% of the variability in verification error rates.

Details

Title: The effects of password length and reference profile size on the performance of a multivariate text-dependent typist verification system
Authors: Doug P Mahar (Author) - Queensland University of Technology
R D Henderson (Author) - University of Canberra
W Laverty (Author) - University of Saskatchewan, Canada
R Napier (Author) - Australian National University
Publication details: Interacting with Computers, Vol.10(4), pp.375-383
Publisher: Oxford University Press
Date published: 1998
DOI: 10.1016/S0953-5438(98)00024-1
ISSN: 0953-5438
Organisation Unit: School of Social Sciences - Legacy; University of the Sunshine Coast, Queensland; Engage Research Lab
Language: English
Record Identifier: 99449206702621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Computer Science, Cybernetics; Ergonomics