ICALP 2011: Eva Tardos: Welfare and Revenue in Ad Auctions Rajeev Alur: Streaming String Transducers Ronen Shaltiel: An Introduction to Randomness Extractors Thore Husfeldt: Invitation to Algorithmic Uses of Inclusion-Exclusion Catuscia Palamidessi: On the relation between Differential Privacy and Quantitative Information Flow