SLIDE 1
Sören Preibusch 1
Sören Preibusch 2
Consumers privacy decision -making Sren Preibusch 12 th July 2010 - - PowerPoint PPT Presentation
Consumers privacy decision -making Sren Preibusch 12 th July 2010 - - PowerPoint PPT Presentation
Consumers privacy decision -making Sren Preibusch 12 th July 2010 W3C Workshop on Privacy for Advanced Web APIs Sren Preibusch 1 Intended reaction towards excessive data collection (first and second choices) Sren Preibusch 2
SLIDE 2
SLIDE 3
Sören Preibusch 3
Privacy Policy Negotiations
- Privacy policies as individualised agreements
‗ ongoing choice amongst service alternatives ‗ incentivised by rewards and stimuli
- Privacy design as a competitive advantage
‗ turn privacy into profits? ‗ market equilibria?
privacy-negotiations.de
SLIDE 4
Sören Preibusch 4
Significantly better market performance
- Privacy score increases with
‗ Alexa rank ‗ user count
- P3P deployment more often on large sites
Bonneau & Preibusch: “Privacy Jungle”
‗ age of site ‗ growing market share
SLIDE 5
Sören Preibusch 5
Laboratory experiment (TU Berlin, Dec. 2009)
SLIDE 6
Sören Preibusch 6
At the participant’s desk
Sören Preibusch 6
SLIDE 7
Sören Preibusch 7
Order forms price: 8.95 data: fav. colour price: 8.95 data: income price: 7.95 data: income
SLIDE 8
Sören Preibusch 8
Purchase decisions per treatment
control treatmt. all 113 112 225 total buyers 32 42 74 Col 17 3 Fra 15 39
‘moderate’ ‘sensitive’ equal price
- diff. price
SLIDE 9
Sören Preibusch 9
32 × 225 × {1,2,3,4}
Willingness to reveal data items
Sören Preibusch 9
■ low willingness ... ■ high willingness to provide data item
Cronbach’s α = 0.91
SLIDE 10
Sören Preibusch 12
Willingness to reveal data items
N = 225
pragmatic majority?
SLIDE 11
Sören Preibusch 13
Take-home message
Valid experiments reveal users’ privacy decision-making.
SLIDE 12
Sören Preibusch 14