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Title: Low-latency privacy-enabled Context Distribution Architecture
Author: Gonçalves, João M.
Gomes, Diogo
Aguiar, Rui
Keywords: Access control
Issue Date: 2012
Publisher: IEEE
Abstract: As personal information and context sharing applications gain traction more attention is drawn to the associated privacy issues. These applications address privacy using an unsatisfactory {"}whitelist{"} approach [1] [2], similar to social networks {"}friends{"}. Some of them also link location publishing with user interaction which is also a form of privacy control - the user has to explicitly say where he is. There are a few automatic location based-services (LBS) that track the user [3], but without more adequate privacy protection mechanisms they enable even bigger threats to the user. On previous work, an XMPP-based Context Distribution Architecture was defined [4], more suitable for the distribution of frequently changing context than other systems because it is based on the publish-subscribe pattern. In this paper the authors present an extension to this architecture that allows for the introduction of a complex degree of access control in context distribution. The devised changes enable the system to consider a number of interesting context privacy settings [1] for context distribution control. Also, this control must be enforced in a way that it doesn't interfere with the real-time nature of the distribution process. After describing the enhancements to the architecture, a prototype of the system is presented. Finally, the delivery latency and additional processing introduced by the access control components is estimated by testing it against the existing system.
Peer review: yes
DOI: 10.1109/ICC.2012.6364027
ISBN: 978-1-4577-2053-6
ISSN: 1550-3607
Appears in Collections:DETI - Comunicações

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