International cyber security and the possibility of threats in cyber space to a physical war

Cyber space is one of the most important issues that can be encountered in every part of life. It has become a security issue that needs attention especially in international relations. Purpose of the study; the possibility that cyber threats in international relations may turn into a physical war. The study consists of four parts. In the first part; historical infrastructure is mentioned by giving information about international cyber security and cyberspace. In the second part; through some states and organizations are mentioned important examples in cyberspace, measures and policies determined for the possible threats. In the third part; what can be done in the possibility of cyber threats turning into a war. In the last part, a general consideration has been made.