Introduction

My name is Gunnar Kreitz, and I was a postdoc in the Theoretical Computer Science group at CSC, KTH. I'm interested in theoretical computer science and networks. In particular, I've worked on Broadcast Encryption, Peer-Assisted Streaming, and Secure Multi-Party Computation. I currently work at Kattis.

Publications

• The Hidden Pub/Sub of Spotify (Industry Article) - DEBS'13
• Understanding User Behavior in Spotify - INFOCOM'13 mini
• Predicting Response Times for the Spotify Backend - CNSM'12 (Best paper)
• Passwords in Peer-to-Peer - IEEE P2P'12
• The Devil is in the Metadata - New Privacy Challenges in Decentralised Online Social Networks - SESOC 2012 (PerCom workshops)
• Five Years with Kattis - Using an Automated Assessment System in Teaching - IEEE Frontiers in Education (FIE) 2011
• Measurements on the Spotify Peer-Assisted Music-on-Demand Streaming System - IEEE P2P'11 industrial session
• Timing is Everything — the Importance of History Detection - ESORICS 2011 (LNCS 6879)
• Secure Multi-Party Sorting and Applications - ACNS'11 industrial track (informal proceedings)
• Aspects of Secure and Efficient Streaming and Collaboration - Doctoral Thesis
• A Zero-One Law for Secure Multi-Party Computation with Ternary Outputs - TCC 2011 (LNCS 6597)
• Practical Private Information Aggregation in Large Networks - Nordsec 2010
• Testdriven utbildning — strukturerad formativ examination - (Swedish) NU 2010
• Spotify - Large Scale, Low Latency, P2P Music-on-Demand Streaming - IEEE P2P'10
• Spotify presentations - (slides only)
• Lower Bounds for Subset Cover Based Broadcast Encryption - AfricaCrypt 2008 (LNCS 5023)
• Stateful Subset Cover - ACNS 2006 (LNCS 3989)
• Optimization of Broadcast Encryption Schemes - My Master's thesis