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| description |
Mobile clients in context-aware systems benefit from the indirect
addressing of users via their context (contextcast), such as
addressing messages to all users in downtown Toronto whose age is
below 35. There is, however, almost no support for a temporal
decoupling in such a contextcast system, i.e., the addressing of
users that were or will be in a certain context in the past or
future, respectively. This could for instance be used to distribute
the minutes of a meeting to all people who attended the meeting in
room 1.138, 3 days ago, between 1 and 3 pm.
To enable a context-aware communication system to address messages
with temporal relations, especially those contexts in the past, the
system needs to manage information about user context histories.
This poses the risk that the system can be abused to profile users,
which would most probably hinder acceptance. Therefore, privacy
aspects need to be considered in the core design of such a system.
We present an extension to our earlier work, which allows a temporal
decoupling of messages and users and requires very little additional
overhead to manage historic context information. The solution
includes mechanisms to efficiently disseminate messages to both
users with past and future contexts, while effectively preventing
user profiling through the use of virtual identities.
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| publisher |
University of Stuttgart : Collaborative Research Center SFB 627
(Nexus: World Models for Mobile Context-Based
Systems)
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| ICST
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| type |
Text
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| Article in Proceedings
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| source |
In: Proceedings of the Sixth Annual International Conference on
Mobile and Ubiquitous Systems: Computing, Networking and Services
(MobiQuitous '09), Toronto, ON, Canada, July 13-16, 2009, pp.
1-10
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| contributor |
Institut für Parallele und Verteilte Systeme, Verteilte
Systeme
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| subject |
Network Architecture and Design (CR C.2.1)
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| Network Protocols (CR C.2.2)
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| Distributed Systems (CR C.2.4)
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| Internetworking (CR C.2.6)
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