Mobile users can obtain a wide range of services by maintaining associations, and sharing location and social context, with service providers. But multiple associations are cumbersome to maintain, and sharing private information with untrusted providers is risky. Using a trusted broker to mediate interactions by managing interfaces, user identities, context, social network links, policies, and enabling cross-domain associations, results in more privacy and reduced management burden for users, as we show in this paper. We also describe the prototype implementations of two practically useful applications that require awareness of participants’ location and social context: (i) targeted advertising, and (ii) social network-assisted online purchases.


Privacy Multi-Domain Social Network Policy Management Middleware Identity Management Online Advertising Online Payment 


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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2013

Authors and Affiliations

  • Venkatraman Ramakrishna
    • 1
  • Apurva Kumar
    • 1
  • Sougata Mukherjea
    • 1
  1. 1.IBM India Research LaboratoryNew DelhiIndia

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