Insights into Internet Privacy for Visually Impaired and Blind - - PowerPoint PPT Presentation

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Insights into Internet Privacy for Visually Impaired and Blind - - PowerPoint PPT Presentation

Mar 24, 2023 350 likes •622 views

Insights into Internet Privacy for Visually Impaired and Blind People Georg Regal , Elke Mattheiss, Marc Busch, Manfred Tscheligi Photo: AIT Austrian Institute of Technology/ Michael Bsendorfer Internet Privacy Personal data in the

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Insights into Internet Privacy for Visually Impaired and Blind People

Georg Regal, Elke Mattheiss, Marc Busch, Manfred Tscheligi

Photo: AIT Austrian Institute of Technology/ Michael Bösendorfer

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Internet Privacy

  • Personal data in the internet
  • Privacy is gaining importance
  • Concerns are increasing
  • Privacy Enhancing

Technology

  • Protection of privacy
  • Control
  • Information
  • Educational effect

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Networkgraphic - CC BY 2.5 0 by Rezonansowy: https://commons.wikimedia.org/wiki/File:Internet_map_1024_-_transparent,_inverted.png

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Privacy is a Right for All Users

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Internet Privacy Accessibility

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Related Work

  • Internet privacy and security for VIB users
  • Hochheiser et al. (2008)
  • Analysis of security and privacy challenges
  • For people with disabilities
  • Buzzi et al. (2009)
  • Trust of screen reader users
  • Guidelines how to promote trust for VIB
  • Sauer et al. (2008)
  • Problems with CAPTCHAs
  • Accessible human-proof tool

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Behavioral Analysis

  • Companies collect and

analyze user behavior

  • Tracker, Beacons, ...
  • Personalized

advertisement

  • User profiles
  • Tracking Blocker
  • Monitor server calls
  • Block trackers
  • Inform

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Accessibility of PET

  • We investigated
  • Privacy concerns of VIB

Internet users

  • Accessibility of tracking

blockers

  • We provide
  • Information material
  • Guidelines for an

accessible tracking blocker

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Privacy Concerns

  • f VIB Internet Users
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Method

  • Two workshops
  • An online survey
  • A tool review of existing

tracking blockers

  • User study - Interviews and
  • bservations

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Accessibility of PET

  • High relevance of

privacy protection

  • For partially sighted

and blind

  • Detection of privacy

problems (sometimes) more complicated

  • Stronger reliance on

digital data

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Online Survey

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  • I consider this threat to be worrisome

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totally disagree disagree undecided agree totally agree

Tracking and Behavioral Analysis Cloud- Storages Search- History Spyware und Adware Social networks Online Shopping Location- Based Data Analysis

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SLIDE 11

Tool review

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Name Estimated accessibility Ghostery

  • Can be accessed by keyboard
  • Interpreted correctly by screenreader
  • Only the old version of the menu is accessible,

the new version is not completely accessible Privacy Badger

  • Not accessible by keyboard only

DisconnectMe

  • No information about keyboard accessibility

Blur

  • No information about keyboard accessibility
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User Study

  • Characteristics of Tracking Blockers
  • Prevention of Tracking
  • Accessibility
  • Usability
  • Information
  • Values
  • Privacy protection
  • Control
  • Equality of opportunity
  • Self-determination

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Accessibility of Tracking Blockers

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Method

  • Two workshops
  • User Study – Comparative

tool testing

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Method - Workshops

  • Feedback strategies
  • Workshop 1
  • Blind participants
  • Audio-only
  • Workshop 2
  • Partially sighted participants
  • Audio and visual

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Guidelines

  • Feedback
  • Three levels of feedback
  • Harmless
  • Critical
  • Dangerous
  • Personalization
  • Choose desired feedback modalities

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Visual Feedback Strategies

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Acoustic Feedback Strategies

  • Ascending tunes
  • Descending tunes
  • Different tunes
  • Same tune multiple times
  • User Feedback
  • Not easy to distinguish
  • Different instruments suggested

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Notes - CC-BY-SA-3.0by Hyacinth: https://commons.wikimedia.org/wiki/File:Quarter_note_run.png

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Guidelines

  • Visual Feedback
  • Different symbols
  • Similar to traffic signs
  • Different shapes complemented by color
  • Sufficient contrast
  • Acoustic feedback
  • A short, concise tune if blocked
  • Preferably different sounds

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Method – User Study

  • 17 participants
  • 3 predefined pages
  • No trackers
  • Little number of trackers
  • High number of trackers
  • Feedback and information
  • Developed interaction prototype
  • Comparison with the tool Ghostery

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Guidelines

  • Control
  • Users define if a tracker is blocked or allowed
  • Global settings but changeable for specific sites
  • Keyboard operation for all options
  • Choose keyboard shortcuts
  • Information
  • Users prefer little automatic information
  • No disruption of the workflow
  • Quick access to further information

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Accessible Tracking Blocker

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Accessible Tracking Blocker

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Accessible Tracking Blocker

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Summary

  • Insight into privacy concerns of

VIB users

  • Guidelines for accessible tracking

blockers

  • http://blindfaith.tech-experience.at/
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AIT Austrian Institute of Technology

Georg Regal Innovation Systems Department Business Unit Technology Experience georg.regal@ait.ac.at