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Optimizing Decision Tree Attack on CAS SchemePERKOVIC, T. , BUGARIC, M. , CAGALJ, M.
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AC voltage regulator, buck-boost converter, PWM, THD
security(15), human(10), authentication(10), systems(6), surfing(6), entry(6), secure(5), privacy(5), computing(5), attacks(5)
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About this article
Date of Publication: 2016-05-31
Volume 16, Issue 2, Year 2016, On page(s): 69 - 74
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2016.02010
Web of Science Accession Number: 000376996100010
SCOPUS ID: 84974806863
In this paper we show a successful side-channel timing attack on a well-known high-complexity cognitive authentication (CAS) scheme. We exploit the weakness of CAS scheme that comes from the asymmetry of the virtual interface and graphical layout which results in nonuniform human behavior during the login procedure, leading to detectable variations in user's response times. We optimized a well-known probabilistic decision tree attack on CAS scheme by introducing this timing information into the attack. We show that the developed classifier could be used to significantly reduce the number of login sessions required to break the CAS scheme.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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