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Tutorial on robustness of recommender Systems Neil Hurley Complex Adaptive System Laboratory Computer Science and Informatics University College Dublin Clique Strategic Research Cluster clique.ucd.ie October 2011

Tutorial on Robustness of Recommender Systems Tutorial on Robustness of Recommender Systems Neil Hurley Complex Adaptive System Laboratory Computer Science and Informatics University College Dublin Clique Strategic Research Cluster clique.ucd.ie October 2011 RecSys 2011: Tutorial on Recommender Robustness

Outline 1 What is Robustness? a Profile Injection Attacks Relevance of robustness a Measuring Robustness

Tutorial on Robustness of Recommender Systems Outline 1 What is Robustness? Profile Injection Attacks Relevance of Robustness Measuring Robustness 2 Attack Strategies Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection Cost-Benefit Analysis 4 Robustness of Model-based Algorithms 5 Attack Resistant Recommendation Algorithms Provably Manipulation Resistant Algorithms 6 Stability, Trust and Privacy RecSys 2011: Tutorial on Recommender Robustness

Outline 1 What is Robustness? a Profile Injection Attacks Relevance of robustness a Measuring Robustness 2 Attack Strategies a Attacking kNN Algorithms

Tutorial on Robustness of Recommender Systems Outline 1 What is Robustness? Profile Injection Attacks Relevance of Robustness Measuring Robustness 2 Attack Strategies Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection Cost-Benefit Analysis 4 Robustness of Model-based Algorithms 5 Attack Resistant Recommendation Algorithms Provably Manipulation Resistant Algorithms 6 Stability, Trust and Privacy RecSys 2011: Tutorial on Recommender Robustness

Outline 1 What is Robustness? a Profile Injection Attacks Relevance of robustness a Measuring Robustness 2 Attack Strategies a Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection ■Cost- Benefit Analysis

Tutorial on Robustness of Recommender Systems Outline 1 What is Robustness? Profile Injection Attacks Relevance of Robustness Measuring Robustness 2 Attack Strategies Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection Cost-Benefit Analysis 4 Robustness of Model-based Algorithms 5 Attack Resistant Recommendation Algorithms Provably Manipulation Resistant Algorithms 6 Stability, Trust and Privacy RecSys 2011: Tutorial on Recommender Robustness

Outline 1 What is Robustness? a Profile Injection Attacks Relevance of robustness a Measuring Robustness 2 Attack Strategies a Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection ■Cost- Benefit Analysis 4 Robustness of Model-based Algorithms

Tutorial on Robustness of Recommender Systems Outline 1 What is Robustness? Profile Injection Attacks Relevance of Robustness Measuring Robustness 2 Attack Strategies Attacking kNN Algorithms 3 Attack Detection PCA-based Attack Detection Statistical Attack Detection Cost-Benefit Analysis 4 Robustness of Model-based Algorithms 5 Attack Resistant Recommendation Algorithms Provably Manipulation Resistant Algorithms 6 Stability, Trust and Privacy RecSys 2011: Tutorial on Recommender Robustness