NDLI: A study of mnemonic image passwords

Content Provider	IEEE Xplore Digital Library
Author	Chowdhury, S. Poet, R. Mackenzie, L.
Copyright Year	2014
Description	Author affiliation: Sch. of Comput. Sci., Univ. of Glasgow, Glasgow, UK (Chowdhury, S.; Poet, R.; Mackenzie, L.)
Abstract	Existing studies in the field of graphical authentication systems (GASs) have shown that users find it difficult to remember multiple image passwords. In this context, it is believed that memorability can be improved if target images making up a graphical password are selected using a mnemonic strategy during the registration stage. We conducted a usability study with 80 subjects, who were required to create four graphical passwords, each using a mnemonic strategy and recall them every week, for a period of four weeks. The results demonstrated that the memorability of the image passwords created using a mnemonic strategy do not improve even when compared to the existing multiple password studies. Hence remembering multiple image passwords using mnemonic strategies is a mentally demanding task. A guessability study was conducted with 70 participants to examine the vulnerability of image passwords to written descriptions. The analysis of the descriptions revealed that most passwords created in the usability study were described by the account holders using annotated/ non annotated sketch of the target images making up a password. This made all the passwords highly guessable. Based on our results we propose a hint-based authentication system, which can improve the memorability of graphical passwords and also provide adequate security. But the usability as well as security of the proposed system needs to be tested before it could be adopted in practice.
Starting Page	207
Ending Page	214
File Size	776851
Page Count	8
File Format	PDF
ISBN	9781479935024
e-ISBN	9781479935031
DOI	10.1109/PST.2014.6890941
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-23
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Art Image recognition usability graphical passwords Authentication mnemonic strategy Educational institutions guesssability Electronic mail Usability
Content Type	Text
Resource Type	Article

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