An improved matrix factorization with local differential privacy based on piecewise mechanism for recommendation systems.
Yong WangMingxing GaoXun RanJun MaLeo Yu ZhangPublished in: Expert Syst. Appl. (2023)
Keyphrases
- matrix factorization
- recommendation systems
- collaborative filtering
- differential privacy
- recommender systems
- differentially private
- privacy guarantees
- user preferences
- recommendation quality
- privacy preserving
- factorization methods
- data sparsity
- privacy preservation
- personalized recommendation
- data sharing
- user feedback
- learning to rank
- implicit feedback
- personal information
- missing data
- web search
- principal component analysis