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      Pictures or Questions? Examining User Responses to Association-Based Authentication

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      Proceedings of HCI 2010 (HCI)

      Human Computer Interaction

      6 - 10 September 2010

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          Abstract

          Challenge questions are commonly used as a backup should users forget their “main” authentication secret. Such questions are notoriously difficult to design properly, and have sometimes allowed intruders to access the system via a back door simply by engaging in some online research about the victim [33]. Most challenge questions rely on a user’s knowledge of their early life, something which tends not to deteriorate over time [15]. Unfortunately, this kind of information can also be discovered by a determined attacker. We developed a challenge protocol in which a set of pictorial cues are used to prompt answers, rather than using the standard mechanism based on textual questions. The prompts solicit associative memories that need not represent factual information (information that aids an attacker in mounting targeted observation attacks) and serve as a stronger cue to aid the recall. Our results reveal that the solution has comparable security with that of traditional challenge questions (when considering external attackers), and suggests additional benefits from posing three or more questions serially. Furthermore, we obtained a 13% increase in the memorability of our (name-based) answers, while our results suggest enhancements could help improve the recall of place-based answers. We conclude by discussing how further modifications could achieve gains on the usability front.

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          Most cited references 16

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          Flashbulb memories

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            Very Long-Lasting Priming in Picture Naming

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              Declarative memory: insights from cognitive neurobiology.

               H. Eichenbaum (1996)
              The discovery of declarative memory as distinct from other forms of memory is a major recent achievement in cognitive science. Basic issues about the nature of declarative memory are considered in this review from the perspective of studies on its underlying brain mechanisms. These studies have shown that declarative memory is mediated by a specific brain system including areas of the cerebral cortex and hippocampal region that make distinct functional contributions to memory processing. These processing mechanisms mediate the organization of memories in ways that can support the special properties of declarative or explicit memory expression. Furthermore, the basic properties of declarative memory in human beings can be viewed as evolving from a capacity for organized memory representation and flexible memory expression in animals.
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                Author and article information

                Contributors
                Conference
                September 2010
                September 2010
                : 98-107
                Affiliations
                Department of Computing Science

                University of Glasgow
                School of Engineering & Computing

                Glasgow Caledonian University
                Article
                10.14236/ewic/HCI2010.14
                © Karen Renaud et al. Published by BCS Learning and Development Ltd. Proceedings of HCI 2010, University of Abertay, Dundee, UK

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                Proceedings of HCI 2010
                HCI
                24
                University of Abertay, Dundee, UK
                6 - 10 September 2010
                Electronic Workshops in Computing (eWiC)
                Human Computer Interaction
                Product
                Product Information: 1477-9358BCS Learning & Development
                Self URI (journal page): https://ewic.bcs.org/
                Categories
                Electronic Workshops in Computing

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