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OakleyIan

Oakley, Ian
Interactions Lab.
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Keeping Secrets from Friends: Design Guidelines for Multiplexed Graphical Passwords

Author(s)
Oakley, IanBianchi, Andrea
Issued Date
2014-08
DOI
10.15187/adr.2014.08.111.3.49
URI
https://scholarworks.unist.ac.kr/handle/201301/18067
Fulltext
http://www.aodr.org/_common/do.php?a=full&b=12&bidx=202&aidx=2395
Citation
ARCHIVES OF DESIGN RESEARCH, v.27, no.3, pp.49 - 63
Abstract
Background Entering passwords on mobile devices often takes place in public, situations in which input actions are exposed to the people around you and passwords can be compromised simply by sneaky glances over shoulders. However, the people who surround a user are typically not malicious attackers seeking to steal data, but rather friends and colleagues. This article characterizes such individuals as casual observers and describes the threats they pose to security and password integrity.
Methods Based on an analysis of the literature and design space, we introduce a systematic framework for multiplexed authentication, a term we introduce to describe a class of systems that maintain security against the threats posed by casual observers through obsfuscated input. Building on this knowledge, we present a set of design dimensions and guidelines for multiplexed graphical passwords. Finally, we present ShaPIN, a multiplexed input prototype designed in light of these guidelines and that aims to protect users against casual observation.
Results Evaluations of ShaPIN with a user study reveal it can be used rapidly, accurately and that it provides protection against in-person observation. ShaPIN also offers substantial performance imporvements over prior systems in its class, evidence that helps support and validate our design framework.
Conclusion We believe that the framework of multiplexed authentication can inform and shape future work to ensure that passwords stay safe and secret in front of friends. By presenting design guidelines for multiplexed graphical passwords we also hope to raise awareness of the important issue of password security in the design community and to show how design research can innovate in this area to create more usable and effective password systems.
Publisher
Korean Society of Design Science
ISSN
1226-8046

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