NSA Chief Warns Companies Against Revenge Hacking

NSA Director Adm. Michael Rogers NSA Director Adm. Michael Rogers Lauren Victoria Burke/AP

Businesses, under siege from hackers looking to steal sensitive information, increasingly want to take matters into their own hands. But the head of the National Security Agency is warning them not to become hackers themselves.

"Be very careful about going down that road," Adm. Michael Rogers, the NSA director, said Tuesday at a cybersecurity event hosted by the U.S. Chamber of Commerce. "As a nonlawyer, I would tell you, wow, think about the legal implications of this."

Some business groups are tired of focusing only on defensive measures as hackers breach their systems. They want to retaliate and damage the hackers' computer systems.

Advocates of "hacking back" say that punishing attackers can be an effective tool for a company to protect itself.

But the Computer Fraud and Abuse Act makes it illegal to break into a computer network without permission. There's no exemption for counterattacks.

Rogers said he understands the desire to hire "cyber mercenaries" to go after hackers. But he argued that companies should instead trust federal law enforcement to prosecute cyber criminals.

Stewart Baker, a former general counsel for the NSA, said companies should get careful legal advice before doing anything to a computer system they don't own.

"But I've given such advice, and there is more flexibility to the law than many government officials imply," Baker told National Journal. "And a good thing, too. It would be preposterous for the U.S. Justice Department to say, 'We can't protect Americans from foreign hackers, but we can prevent Americans from protecting themselves.' "

Of course, Rogers's advice doesn't apply to himself or other government officials. The NSA and U.S. Cyber Command (which Rogers also heads) have long prepared for "offensive cyber operations" to disrupt enemy computer systems or conduct surveillance.

According to documents leaked by Edward Snowden, the U.S. conducted 231 cyberattacks in 2011.

At Tuesday's event, Rogers said Defense Department officials are continuing to work to update military rules of engagement in cyberspace. Too many foreign nations and individuals apparently think that attacking U.S. networks is a low-risk proposition, Rogers said.

"That is not in our best interests in the long term as a nation for others to have that perception," Rogers said. "We need to change that."

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