近年来,美国不断提高网络安全在国家安全战略中的地位。美国情报界公布的2013年度《安全威胁评估报告》显示,网络威胁已超过恐怖主义和大规模杀伤性武器扩散,位列美国面临的各类安全威胁之首。与此同时,美国认为中国是其网络安全的主要威胁来源,公开指称中国政府支持和参与针对美国政府机构、军事部门和私营企业的网络窃密和攻击活 In recent years, the United States has continuously improved the status of cybersecurity in its national security strategy. The 2013 Security Threat Assessment Report released by the U.S. intelligence community shows that the cyber threat has surpassed the proliferation of terrorism and weapons of mass destruction and ranks first among all kinds of security threats the United States faces. At the same time, the United States considers China a major source of threat to its cybersecurity and publicly allegations that the Chinese government supports and participates in cyber-theft and attacks on U.S. government agencies, the military and the private sector