The U.S. has never stopped in the global cyber spying activities. Because the network attack of highly customized, concealment and technical complexity, often leads to the network attack activities may be difficult to find and traceability. As to us national security agency in recent years, network attack multiple exposures, the outside world to us national security agency's global network attack espionage cases have more understanding.

The purpose of the national security agency against espionage, not just stealing state information, business information and their goals. U.S. national security agency will directly against espionage, through the network to help American companies an unfair advantage.

Important information to the state, or business intelligence to steal, the United States has a shameful history, clearly but tend to doubt its adjacent mentality accuse other stolen his axe.