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2007
ACM

SmokeScreen: flexible privacy controls for presence-sharing

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SmokeScreen: flexible privacy controls for presence-sharing
Presence-sharing is an emerging platform for mobile applications, but presence-privacy remains a challenge. Privacy controls must be flexible enough to allow sharing between both trusted social relations and untrusted strangers. In this paper, we present a system called SmokeScreen that provides flexible and power-efficient mechanisms for privacy management. Broadcasting clique signals, which can only be interpreted by other trusted users, enables sharing between social relations; broadcasting opaque identifiers (OIDs), which can only be resolved to an identity by a trusted broker, enables sharing between strangers. Computing these messages is power-efficient since they can be precomputed with acceptable storage costs. In evaluating these mechanisms we first analyzed traces from an actual presence-sharing application. Four months of traces provide evidence of anonymous snooping, even among trusted users. We have also implemented our mechanisms on two devices and found the power demand...
Landon P. Cox, Angela Dalton, Varun Marupadi
Added 24 Dec 2009
Updated 24 Dec 2009
Type Conference
Year 2007
Where MOBISYS
Authors Landon P. Cox, Angela Dalton, Varun Marupadi
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