A comparison of cyber security policies of U.S presidents (2000-2020)

Today, cyber space has been turned into one of the most important dimensions of security in our world. With the development and growth of cyber technology, we face an increase in threats of this arena. According to their goals, governmental and non- governmental actors have taken actions against U.S national security. Therefore, change and evolution in the national security with considering cyberspace and its possible threats, from George W. Bush time, has borne different characteristics. The paper tries to review the characteristics of policy and strategies of the U.S presidents against the threats. To answer the paper`s central question, we show that the U.S cyber strategy, under Bush, was defensive and marginal; had domestic and international development under Obama; and was openly offensive under Trump. This paper has been written by library resources and documents in content analysis method and descriptive approach.Keywords: Cyber security, US, Bush, Obama, Trump