IT security concerns you. In fact, like it or not, it concerns everybody, however sceptical they may be. Theft of hardware or data, virtual identity theft, and even surveillance of online activity, are no longer crimes to which only celebrities fall victim, but ones which may be perpetrated against any one of us. As key players at a reputable Swiss ecole polytechnique, we all have a duty to be aware of the risks in terms of internet security, and to know how to react when faced with the increasing number of threats, virtual or otherwise, to which we are exposed.