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  3. Using only a few computers, researchers at the federal Idaho National Laboratory managed to launch a cyberattack that crippled a

Using only a few computers, researchers at the federal Idaho National Laboratory managed to launch a cyberattack that crippled a

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问题     Using only a few computers, researchers at the federal Idaho National Laboratory managed to launch a cyberattack that crippled an electricity generator earlier this year. The test, performed on a replica of common power plant control systems that operate over the Internet, tricked the machine into operating at levels that caused it to smoke and then destroy itself. Funded bythe Department of Homeland Security (DHS), this was an unsettling demonstration of how vulnerable America’s critical infrastructure is to online assaults.
    As early as this week, the Bush administration is expected to request significant new funding to ratchet up its cybersecurity efforts. Under a new initiative, a broad set of federal agencies would coordinate the monitoring and defense of government networks, as well as private systems that operate key services like electricity, telecommunications, and banking. But officials are divided over how much of the program, which will be run by DHS, to discuss publicly because of the sizable involvement of U.S. intelligence agencies.
    The sensitivity also reflects how officials increasingly view cybersecurity as a national security concern, with threats coming not only from whiz-kid hackers but also foreign intelligence agencies and militaries. The nation’s computer networks "are under persistent attack now," warns Joel Brenner, the nation’s top counterintelligence official.
    In just the past year, officials reported that the number of cyberattacks on government computer networks more than doubled. "The adversaries are becoming more nimble, more focused, and more sophisticated in their attempts to exploit our vulnerabilities," says a DHS source. But in some ways, the private networks that operate critical infrastructure could be even more vulnerable. "There is no government entity that can require cybersecurity controls be put in place in the private sector," says Rep. Jim Langevin, chairman of a House cybersecurity subcommittee.
    Currently, the government’s leading experts in cybersecurity, who work at the supersecret National Security Agency (NSA), are responsible only for guarding classified networks. As first reported in the Baltimore Sun, the new effort envisages expanding NSA’s cyberdefense efforts to unclassified government systems and private industry. The proposal, however, has sparked some concerns about privacy, because defending networks is such an invasive process. "In order to defend the cyberspace on which these critical systems depend, we have to be able to both monitor and control them," says Sami Saydjari, a former NSA official who runs the Cyber Defense Agency, a private consulting firm. "That’s an intelligence system, and one could use that intelligence system for good or for evil."
U.S. officials have elevated cybersecurity to a national concern most probably because
选项 A、it has turned into a sensitive issue in America.
B、the Bush administration has upgraded its cybersecurity efforts.
C、U.S. computer networks are under various threats.
D、it has triggered some controversy in U.S. public.
答案C
解析 事实细节题，属于因果细节。由national concern定位到第三段。其中讲到网络安全之所以是一个国家安全问题，是因为那些威胁不仅仅来自神童黑客，还来自其他国家的情报机关和军队，故C项正确。
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