Abstract
Recommender systems offer an effective method of alleviating privacy policy usability issues on Social Media Platforms. However, matching usability with privacy preservation is a challenging problem. In this paper, we first present a comparative analysis to demonstrate that supporting recommender systems with the Random Forest Algorithm (RFA) instead of the J48 decision tree algorithm results in an extra improvement of 5.7% in classification accuracy and that when feature vectors are extended, added classification accuracies of 15%–25% on average are achieved. This improvement comes at the cost of performance, from the usability perspective, due to the high requirement of manual user input. We address this issue with a “Snow-Ball” algorithm that reduces the user input requirement by 81.8%–87.5% and works by employing privacy policy correlation graphs. Our results indicate that the accuracy levels are similar to those of the RFA with manual user input.
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- 1.
In the recommender systems’ literature, the user that receives the recommendations (i.e. suggestions) is usually referred to as the “target user”.
- 2.
Since the recommender is designed to be a server-side solution, we expect that it will have direct access to users’ profiles’ data.
- 3.
For more information about the simulated datasets, and the simulation model used to generated them, please refer to [1].
- 4.
This can be done by slightly changing any known algorithm for finding minimum spanning trees such as Kruskal’s algorithm.
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Acknowledgements
The authors gratefully acknowledge funding for this research provided by the National Research Foundation (NRF) of South Africa, and the Norwegian National Research Council.
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Abuelgasim, A., Kayem, A.V.D.M. (2017). A Snow-Ball Algorithm for Automating Privacy Policy Configuration in Social Media. In: Camp, O., Furnell, S., Mori, P. (eds) Information Systems Security and Privacy. ICISSP 2016. Communications in Computer and Information Science, vol 691. Springer, Cham. https://doi.org/10.1007/978-3-319-54433-5_7
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