Preventing Shoulder-Surfing Attacks using Digraph Substitution Rules and Pass-Image Output Feedback

Por, Lip Yee and Ku, Chin Soon and Ang, Tan Fong (2019) Preventing Shoulder-Surfing Attacks using Digraph Substitution Rules and Pass-Image Output Feedback. Symmetry, 11 (9). p. 1087. ISSN 2073-8994, DOI https://doi.org/10.3390/sym11091087.

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Official URL: https://doi.org/10.3390/sym11091087

Abstract

In this paper, we focus on methods to prevent shoulder-surfing attacks. We initially adopted digraph substitution rules from PlayFair cipher as our proposed method. PlayFair cipher is a modern cryptography method, which exists at the intersection of the disciplines of mathematics and computer science. However, according to our preliminary study it was insufficient to prevent shoulder-surfing attacks. Thus, a new method had to be proposed. In this new proposed method, we improvised the digraph substitution rules and used these rules together with an output feedback method to determine a pass-image. Our proposed method was evaluated with a user study. The results showed our proposed method was robust against both direct observation and video-recorded shoulder-surfing attacks. © 2019 by the authors.

Item Type: Article
Funders: BKP Special grant number BKS022-2018 from the University of Malaya, Malaysia, Fundamental Re-search Grant Scheme (FRGS) grant number Fp114-2018A from the Ministry of Higher Education, Malaysia
Uncontrolled Keywords: Digraph substitution rules; Graphical authentication; Output feedback; Shoulder-surfing; User authentication
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Computer Science & Information Technology
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Feb 2020 01:00
Last Modified: 12 Feb 2020 01:00
URI: http://eprints.um.edu.my/id/eprint/23746

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