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