The information war is already engaged. First of all, it is obvious that the control of information is crucial for the management of political societies and the enterprises decisions. Then, the Internet revolution led to two major changes in our perception of reality; the availability of a large the amount of information is very useful but it is distributed between many actors. Finally, these systems seem to be fragile and could be hit and looted. Information is power, which is able to modify the behaviour of States or enterprises.