An enhanced privacy-preserving recommender system
P Verma, H Vaishnav, A Mathuria… - Security and Privacy …, 2019 - Springer
Security and Privacy: Second ISEA International Conference, ISEA-ISAP 2018 …, 2019•Springer
A recommender system stores historical data collected over a long period from various
users, these are used to predict how new and existing users would rate an item. As user
data is stored by the system, this poses threat to user's privacy. The goal of a privacy
preserving recommender system is to hide user ratings from system and yet allow to make
recommendations. A recent example is the privacy-preserving recommender scheme
proposed by Badsha, Yi and Khalil. Their scheme assumes that the server is semi-honest …
users, these are used to predict how new and existing users would rate an item. As user
data is stored by the system, this poses threat to user's privacy. The goal of a privacy
preserving recommender system is to hide user ratings from system and yet allow to make
recommendations. A recent example is the privacy-preserving recommender scheme
proposed by Badsha, Yi and Khalil. Their scheme assumes that the server is semi-honest …
Abstract
A recommender system stores historical data collected over a long period from various users, these are used to predict how new and existing users would rate an item. As user data is stored by the system, this poses threat to user’s privacy. The goal of a privacy preserving recommender system is to hide user ratings from system and yet allow to make recommendations.
A recent example is the privacy-preserving recommender scheme proposed by Badsha, Yi and Khalil. Their scheme assumes that the server is semi-honest. However, when the server is malicious an attack is possible, as shown by Mu, Shao and Miglani. In this paper, we propose a simple modification to their scheme, which preserves the privacy of ratings against a malicious server. We demonstrate that the computation and communication costs of modified protocol are reasonable in comparison to original protocol.
Springer
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