Abstract
In order to overcome the problems of low recommendation quality and poor privacy protection ability of existing user privacy protection algorithms. This paper proposes a new privacy protection algorithm based on group recommendation. The general model of recommender system is analysed by user modelling, recommender object modelling and recommender algorithm, and the privacy concerns of perceptual recommender system are analysed by questionnaire. Based on the classification of user privacy concerns, group recommendation is introduced, and the user data is submitted anonymously through the anonymous nature of senders provided by crowds network, so as to prevent the server and malicious users from identifying good users and complete the research of protection algorithm. The experimental results show that the proposed algorithm has good recommendation quality, the highest recommendation accuracy of 99%, and high anti attack success rate and reliability.
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