Kirkwood, D., Tombul, C., Firth, C., MacDonald, F., Priftis, K., Mathis, F., Khamis, M. and Marky, K. (2022) PIN Scrambler: Assessing the Impact of Randomised Layouts on the Usability and Security of PINs. In: 21st International Conference on Mobile and Ubiquitous Multimedia (MUM 2022), Lisbon, Portugal, 27-30 Nov 2022, pp. 83-88. ISBN 9781450398206 (doi: 10.1145/3568444.3568450)
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Abstract
Randomizing the layout of the keypad has been proposed to improve the security of PIN entry. However, there has been no empirical quantification of its impact on usability and security. We present the first usability (N=17) and security (N=24) evaluations to compare PIN entry with the standard vs randomized layout. Our results show that randomizing the layout increases resistance to shoulder surfing and thermal attacks significantly, and has a very minor impact on entry accuracy, but it increases entry time (from ≈ 1.4 seconds to ≈ 2 seconds). We discuss how this simple approach can improve security with little impact on usability.
| Item Type: | Conference Proceedings |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Marky, Dr Karola and Mathis, Mr Florian and Khamis, Dr Mohamed |
| Authors: | Kirkwood, D., Tombul, C., Firth, C., MacDonald, F., Priftis, K., Mathis, F., Khamis, M., and Marky, K. |
| College/School: | College of Science and Engineering > School of Computing Science |
| ISBN: | 9781450398206 |
| Copyright Holders: | Copyright © 2022 The Authors |
| First Published: | First published in 21st International Conference on Mobile and Ubiquitous Multimedia (MUM 2022): 83-88 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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