Editorial message: Special track on computer security

Giampaolo Bella, Peter Y.A. Ryan, Gail Joon Ahn, Arslan Brömme, David W. Chadwick, Bruce Christianson, Nancy Durgin, Simon Foley, Cèdric Fournet, Dieter Gollmann, Stefanos Gritzalis, Peter Honeyman, Sokratis K. Katsikas, Markus Kuhn, Heiko Mantel, Chris Mitchell, David Von Oheimb, Pierangela Samarati, Vitaly Shmatikov, Kymie Tan