1. imec-SMIT, Vrije Universiteit Brussel, Belgium
2. Imperial College Business School, Imperial College London, UK
3. imec-COSIC, KU Leuven, Heverlee, Belgium
4. Department of Computer Science, The University of Manchester, UK
5. Department of Management, University of Antwerp, Antwerpen, Belgium
6. ESADE Business School, Barcelona, Catalunya, Spain
7. Department of Communication Science, University of Twente, AE Enschede, the Netherlands