Keyphrases
- matrix factorization
- differential privacy
- differentially private
- privacy preserving
- collaborative filtering
- recommender systems
- low rank
- privacy preservation
- data sharing
- negative matrix factorization
- missing data
- factorization methods
- nonnegative matrix factorization
- peer to peer
- sensitive information
- distributed data
- search logs
- data privacy
- learning to rank
- information retrieval