Perturbation Based Privacy Preserving Slope One Predictors for Collaborative Filtering

Abstract : The prediction of the rating that a user is likely to give to an item, can be derived from the ratings of other items given by other users, through collaborative filtering (CF). However, CF raises concerns about the privacy of the individual user’s rating data. To deal with this, several privacy-preserving CF schemes have been proposed. However, they are all limited either in terms of efficiency or privacy when deployed on the cloud. Due to its simplicity, Lemire and MacLachlan’s weighted Slope One predictor is very well suited to the cloud. Our key insight is that, the Slope One predictor, being an invertible affine transformation, is robust to certain types of noise. We exploit this fact to propose a random perturbation based privacy preserving collaborative filtering scheme. Our evaluation shows that the proposed scheme is both efficient and preserves privacy.
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Communication dans un congrès
Theo Dimitrakos; Rajat Moona; Dhiren Patel; D. Harrison McKnight. 6th International Conference on Trust Management (TM), May 2012, Surat, India. Springer, IFIP Advances in Information and Communication Technology, AICT-374, pp.17-35, 2012, Trust Management VI. 〈10.1007/978-3-642-29852-3_2〉
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Anirban Basu, Jaideep Vaidya, Hiroaki Kikuchi. Perturbation Based Privacy Preserving Slope One Predictors for Collaborative Filtering. Theo Dimitrakos; Rajat Moona; Dhiren Patel; D. Harrison McKnight. 6th International Conference on Trust Management (TM), May 2012, Surat, India. Springer, IFIP Advances in Information and Communication Technology, AICT-374, pp.17-35, 2012, Trust Management VI. 〈10.1007/978-3-642-29852-3_2〉. 〈hal-01517652〉

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