Diploma thesis is focused on the issue of the information warfare in context of debate about modern warfare. Firstly, thesis presented the debate of modern ways of warfare, which consists concepts such as hybrid warfare, non-linear warfare etc. Then presented three main concepts of information warfare in the context of this debate and within the three centres of contemporary power in the world (West, Russia and China). Western concept clearly separating war and peace, Russian complex concept of hybrid-information war and Chinese concept of three warafres. Subsequently, the thesis develops a thesis on the securitization of information warfare in the western environment (EU and NATO states). Securitization is understood as a rhetorical act that presents a phenomenon as a major security threat. In the context of the West, the information warfare has been to some extent securitized. This whole securitization is problematic if we look at the information warfare as a normal state of international relations, which are inherently conflicting and anarchic.