Keyphrases
- collaborative filtering
- recommender systems
- matrix factorization
- data sparsity
- countermeasures
- user preferences
- recommendation systems
- deal with information overload
- personalized recommendation
- pearson correlation coefficient
- information filtering
- web page recommendation
- secret key
- cold start
- denial of service attacks
- neighbor selection
- recommendation quality
- maximum margin matrix factorization
- dos attacks
- making recommendations
- malicious users
- demographic information
- attack detection
- collaborative filtering algorithms
- social networks
- transfer learning
- user profiles
- website