4.7 Article

Privacy Preserving Location-Aware Personalized Web Service Recommendations

期刊

IEEE TRANSACTIONS ON SERVICES COMPUTING
卷 14, 期 3, 页码 791-804

出版社

IEEE COMPUTER SOC
DOI: 10.1109/TSC.2018.2839587

关键词

Web services; Quality of service; Privacy; Protocols; Servers; Cryptography; Service computing; Web service; QoS; recommendations; privacy; geographical locations

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The personalized Web service recommendation based on Quality of Service (QoS) is gaining popularity, with collaborative filtering techniques contributing to high accuracy predictions. User location is also an important factor, and privacy-preserving protocols can ensure secure and practical recommendations without disclosing private information.
The personalized Web service recommendation based on Quality of Service (QoS) is gaining increasing popularity due to its promising ability to help users find high quality services. Studies suggest that it is beneficial to use Collaborative Filtering (CF)-based techniques to facilitate Web service recommendations which can achieve high accuracy in predicting the QoS for unobserved Web services. With the QoS, location of users and Web services has been another significant factor in predicting the QoS values. The more factors that are available to the service providers, the more accurate predictions can be generated. However these factors are privacy sensitive and therefore it is risky to disclose them to any third party service provider. To address this challenge, in this paper we develop a privacy preserving protocol to predict missing QoS values and thereby providing Web service recommendations based on past QoS experiences and locations of users. Our protocol is able to achieve user privacy by means of encrypting the QoS and location as well as to select suitable Web services for users without disclosing any private information. We conduct extensive experimental analysis on publicly available data sets and prove that our method is both secure and practical.

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