Keyphrases
- language model
- privacy issues
- personal information
- privacy preserving
- language modeling
- document retrieval
- privacy preserving data mining
- information retrieval
- n gram
- speech recognition
- probabilistic model
- data mining
- sensitive information
- retrieval model
- query expansion
- privacy protection
- privacy concerns
- language modelling
- statistical language models
- test collection
- private information
- privacy preservation
- machine learning
- document ranking
- smoothing methods
- data sources