CyCon is the annual NATO Cooperative Cyber Defence Centre of Excellence conference where topics vary from technical to legal, strategy and policy. The pre-conference workshop day, 26 May 2015, features a variety of talks and hands-on training. The 7th International Conference on Cyber Conflict (CyCon 2015) held on 27-29 May 2015 in Tallinn, Estonia, will focus on the construction of the Internet and its potential future development. This year’s topic - “Architectures in Cyberspace” - asks what cyberspace is and will be in the coming years as well as what are its characteristics relevant for cyber security.