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22138 Privacy-Preserving Collaborative Filtering based on Horizontally Partitioned Dataset
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Jeckmans, A.J.P. and Tang, Qiang and Hartel, P.H. (2012) Privacy-Preserving Collaborative Filtering based on Horizontally Partitioned Dataset. In: International Conference on Collaboration Technologies and Systems (CTS 2012), 21-25 May 2012, Denver, CO, USA. pp. 439-446. IEEE Computer Society. ISBN 978-1-4673-1381-0

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Nowadays, recommender systems have been increasingly used by companies to improve their services. Such systems are employed by companies in order to satisfy their existing customers and attract new ones. However, many small or medium companies do not possess adequate customer data to generate satisfactory recommendations. To solve this problem, we propose that the companies should generate recommendations based on a joint set of customer data. For this purpose, we present a privacy-preserving collaborative filtering algorithm, which allows one company to generate recommendations based on its own customer data and the customer data from other companies. The security property is based on rigorous cryptographic techniques, and guarantees that no company will leak its customer data to others. In practice, such a guarantee not only protects companies' business incentives but also makes the operation compliant with privacy regulations. To obtain precise performance figures, we implement a prototype of the proposed solution in C++. The experimental results show that the proposed solution achieves significant accuracy difference in the generated recommendations.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-DIES: Distributed and Embedded Security
Research Program:CTIT-ISTRICE: Integrated Security and Privacy in a Networked World
Research Project:Kindred Spirits: Privacy Enhanced Social Networking
Uncontrolled Keywords:Recommender System, Collaborative Filtering, Privacy, Homomorphic Encryption
ID Code:22138
Deposited On:23 August 2012
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