Titan Rain was the designation given by the federal government of the United States to a series of coordinated attacks on American computer systems since 2003; they were known to have been ongoing for at least three years. The attacks were labeled as Chinese in origin, although their precise nature, e.g., state-sponsored espionage, corporate espionage, or random hacker attacks, and their real identities – masked by proxy, zombie computer, spyware/virus infected – remain unknown. The activity known as "Titan Rain" is believed to be associated with an Advanced Persistent Threat.
In early December 2005 the director of the SANS Institute, a security institute in the United States, said that the attacks were "most likely the result of Chinese military hackers attempting to gather information on U.S. systems."
Titan Rain hackers gained access to many United States defense contractor computer networks who were targeted for their sensitive information, including those at Lockheed Martin, Sandia National Laboratories, Redstone Arsenal, and NASA.
See also 
- Shawn Carpenter
- Moonlight Maze
- Operation Aurora
- Advanced Persistent Threat
- Computer network operations
- Graham, Bradley (2005-08-25). "Hackers Attack Via Chinese Web Sites". Washington Post.
- Espiner, Tom (2005-11-23). "Security experts lift lid on Chinese hack attacks". ZDNet News. Archived from the original on 2006-12-11.
- Thornburgh, Nathan (2005-08-25). "Inside the Chinese Hack Attack". Time.com.
- Thornburgh, Nathan (2005-08-29). "The Invasion of the Chinese Cyberspies (And the Man Who Tried to Stop Them)". Time.
- Brenner, Bill. "Myfip's Titan Rain connection". 2005-08-31.
- Onley, Dawn S.; Wait, Patience (2007-08-21). "Red Storm Rising". Government Computing News.
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