Was stuxnet an act of war?

Modern societies live in the complex and fragile information environment, in which data processing and exchange grow exponentially. Different digital computerized systems support most of key infrastructures like financial systems, power and water supplies, air traffic management, public and military communications. To increase accessibility to those systems in the information domain, it requires interoperability and interconnectivity which makes them complex to maintain and vulnerable to cyber-attacks/intrusions. The Internet is an ownerless, ubiquitous and open to all information exchange domains which can shape the international relations through the cyber domain and there is no internationalentity that can control and affect the data flow. Each country has its own legislation to react and influence local users through Internet service providers and only close cooperation among the states can help to identify and prevent illegal activities against other states as well as support foreign countries during investigations. The paper will uncover how cyber weapon was used to influence state struggling, becoming a nuclear power for the first time. It is divided into two parts to explain the essence of the act of war and cyberspace to understand the environment where Stuxnet was applied. Next it will focus on impact and reaction of Stuxnet in order to analyse its utilization within cyberspace.