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  • policy-negotiation

    Rights statement: © 2016 ACM. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM Transactions on Autonomous and Adaptive Systems http://dx.doi.org/10.1145/2821512

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Privacy policy negotiation in social media

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Article number4
<mark>Journal publication date</mark>02/2016
<mark>Journal</mark>ACM Transactions on Autonomous and Adaptive Systems
Issue number1
Volume11
Number of pages29
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Social media involve many shared items, such as photos, which may concern more than one user. The challenge is that users’ individual privacy preferences for the same item may conflict, so an approach that simply merges in some way the users’ privacy preferences may provide unsatisfactory results. Previous proposals to deal with the problem were either time-consuming or did not consider compromises to solve these conflicts (e.g., by considering unilaterally imposed approaches only). We propose a negotiation mechanism for users to agree on a compromise for these conflicts. The second challenge we address in this article relates to the exponential complexity of such a negotiation mechanism. To address this, we propose heuristics that reduce the complexity of the negotiation mechanism and show how substantial benefits can be derived from the use of these heuristics through extensive experimental evaluation that compares the performance of the negotiation mechanism with and without these heuristics. Moreover, we show that one such heuristic makes the negotiation mechanism produce results fast enough to be used in actual social media infrastructures with near-optimal results.

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© 2016 ACM. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM Transactions on Autonomous and Adaptive Systems http://dx.doi.org/10.1145/2821512