The latest hack involves the Pentagon's $300 billion Joint Strike Fighter project, where it is reported that intruders successfully managed to grab several terabytes of data, including information about the design and electronics systems of the program. Although the hack could allow the thieves to better defend against the Joint Strike Fighter, Pentagon officials said the most sensitive data about the program was untouched, since it is stored on a computer not connected to the Internet.

Currently, the United States has no centralized government or military office responsible for cyber-security. Shortly after taking office, Obama ordered his National Security and Homeland Security advisers to conduct a 60-day review of the U.S. government's cyber-security plans, programs and activities. The review, which is due as early as this week, is headed by Melissa Hathaway, who served as the national cyber-security coordinator under former President Bush.