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  1. 1. Privacy and Identity Issues in Context-Rich Mobile Community ServicesBrussels, 29th March 2011Dipl.-Wirt.-Inf.Christian KahlChair of Mobile Business & Multilateral SecurityGoethe University Frankfurt
  2. 2. Introduction Motivation On-line social communities (e.g. Facebook, LinkedIn) used ever more Sharing of personal information (e.g. interests, pictures, places, etc.) In addition: Mobile community services Allow to participate in the community “any time, any place” (e.g. Facebook Places, MySpace) Make use of context information (e.g. location, time) Enable a deeper integration of people’s virtual (mobile) and real world communities (e.g. Loopt, Foursquare, Junaio, Aka-Aki, match2blue) To finance such community services the infrastructure needs to be open for marketing activities of advertisers⇒ New approach to privacy and identity management in community services needed⇒ to meet the stakeholders’ different needs⇒ Driven by users, applications, and examples 2
  3. 3. Introduction Approach A new approach to privacy and identity management for mobile communities Driven by users, applications, and examplesMajor Steps: 3
  4. 4. PICOS Features Implementing privacy: The PICOS Application PrototypesCommunity Applications for Anglers and GamersImplementing new or enhancing existing user-centricconcepts for mobile communitiesAdvanced privacy and identity management features,e.g.: Partial Identities Sub-Communities Blurring Private Site MyFiles Privacy Policies Privacy Advisor 4
  5. 5. PICOS Features Partial IdentitiesDifferent Partial Identities for different usage contexts to reflect various roles of usersLimited set of personal informationdisclosed for each Partial Identity E.g. in different sub-communities, Partial Identities support a user in hiding and revealing elements of his personal information.Relation between the differentPartial Identities is only visible for the user itself and for the community operator 5
  6. 6. PICOS Features BlurringBlurring of location data Location is obfuscated on a map to hide one’s own (exact) position, without being completely invisible to others allow only selected people to view the exact positionUsers specify whether other users are able to seetheir exact position or blurred positionDifferent levels of blurring to control degree of obfuscation (e.g., 1, 2, or 5 km) 6
  7. 7. PICOS Features Private SiteInvisible in previously defined areas User can set private site on the map to hide one’s own position, without being completely invisible to others to allow only selected people to view the current position within a previous defined areaUsers specify which other users are able to seetheir position 7
  8. 8. PICOS Features Privacy AdvisorProvides privacy related guidance to users e.g. regarding sharing of location info or publishing of sensitive personal dataContext sensitive provides hints in situations when personal information of users is involved (e.g. profile editing)Aims to help users managing their privacy to create awareness of privacy related aspects within mobile communities 8
  9. 9. PICOS Features Privacy PoliciesEnables users to selectively define Policies in order to control who is allowed to see certain personal information User can determine which information is available to other users in a defined situation.Different types of Policies Policies can be defined for users’ presence, location, and profile attributes. 9
  10. 10. Portability of PICOS conceptsImplementations on further mobile platforms 10
  11. 11. Outlook Aspects of future researchMarketing/Advertising in Communities Location Based Advertising Addressing groups/communities instead of single users Users automatically being used as implicit “testifiers”Mobile (Group) Recommender Systems Usage of community members’ profile information Context-related use of profile information Integration in (mobile) community servicesMobile (Device) Sensing Usage of (continuously) sensed data in e.g. communities Automatic (unconscious) delivery of data Pre-defined policies (?) picos@m-chair.net www.picos-project.eu www.twitter.com/picos_project www.facebook.com/picos.project 11
  12. 12. Project FactsStart: 01-Feb-2008Duration: 3.5 yearsBalanced mixture of industrial and academicpartnersCoordinator: Goethe University FrankfurtReceives funding from European Commission 7thFramework Programmewww.picos-project.eu 12