Preventing Shoulder-Surfing Attacks using Digraph Substitution Rules and Pass-Image Output Feedback
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 scienc...
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| Main Authors: | , , |
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| Format: | Article |
| Published: |
MDPI
2019
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/23746/ https://doi.org/10.3390/sym11091087 |
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| Summary: | 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. |
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