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Lookup NU author(s): Dr Dylan Clarke, Ehsan Toreini, Professor Feng Hao
Memorable words have become a common technique in online banking security as a second authentication factor that is partially resistant to observation by adversaries. We formally model this technique and analyze the expected number of observations until the memorable word is known, for a range of common word lengths. We also calculate the probability of an adversary successfully passing authentication with knowledge of some but not all characters from the memorable word.
Author(s): Clarke D, Toreini E, Hao F
Publication type: Report
Publication status: Published
Series Title: School of Computing Science Technical Report Series
Year: 2015
Pages: 10
Print publication date: 01/04/2015
Report Number: 1461
Institution: School of Computing Science, University of Newcastle upon Tyne
Place Published: Newcastle upon Tyne
URL: http://www.cs.ncl.ac.uk/publications/trs/papers/1461.pdf
