Karim Said’s research while affiliated with University of Maryland, Baltimore County and other places

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Publications (2)


AudioAuth: Exploring the Design and Usability of a Sound-Based Authentication System
  • Article

August 2015

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80 Reads

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6 Citations

Karim Said

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In this paper, the authors describe a novel design alternative to the traditional PIN-based user authentication process, through the selection of a sequence of abstract sounds. The authors conducted two studies as part of the research. The frst study examines a user's ability to discriminate between sounds based on the manipulation of various sound characteristics. Results highlighted the benefts of timbre and spatial positioning as differentiators. They also found manipulations of pitch, rhythm, and spatial position further complement a capacity for discerning between sounds. Using fndings from the frst study, they conducted a second study, which examined the usability of a sound-based authentication interface, AudioAuth. Finally, the authors conducted retrospective interviews with study participants to investigate the potential applicability of AudioAuth design concepts in a mobile context. The authors ' insights gained from the research, including methodological lessons, offer guidance to interface designers interested in exploiting the potential of abstract sounds to support the user authentication workfows.


Table 2: Average Similarity Ratings (from four-point Likert scale) 
Table 3: Example of AudioAuth Authentication Process 
Towards the Development of AudioAuth: An Auditory Authentication System.
  • Conference Paper
  • Full-text available

September 2014

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999 Reads

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1 Citation

In this paper, we describe a novel approach to support the traditional PIN-based user authentication process, through the selection of a sequence of abstract sounds. We conducted two studies as part of the research. The first study examined the user’s ability to discriminate between sounds. Results highlighted the benefits of timbre as a differentiator. We also found manipulations of pitch, rhythm, and spatial position further compliment a capacity for discerning between sounds. Using findings from the first study, we conducted a second study that examined the usability of a sound-based authentication interface, AudioAuth. Insights gained from the research, including methodological lessons, offer guidance to interface designers interested in exploiting the potential of abstract sounds to support the user authentication workflows.

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Citations (2)


... This means that the object picture superiority effect can also be applied to the blind and visually impaired because visual images are stored based on a combination of various sensory cues like audio, touch and smell [22]. According to the auditory picture superiority effect, sound effects or environmental sounds are more memorable than verbal and non-verbal words [13,20,32]. Gloede et al. [13] also noted that auditory memory performs better than visual memory over a longer duration of time. ...

Reference:

Picture superiority effect in authentication systems for the blind and visually impaired on a smartphone platform
AudioAuth: Exploring the Design and Usability of a Sound-Based Authentication System
  • Citing Article
  • August 2015