Scientific American: The Pentagon has made clear in recent weeks that cyber warfare is no longer just a futuristic threat—it is now a real one. U.S. government agency and industry computer systems are already embroiled in a number of nasty cyber warfare campaigns against attackers based in China, North Korea, Russia and elsewhere. As a counterpoint, hackers with ties to Russia have been accused of stealing a number of Pres. Barack Obama’s e-mails, although the White House has not formally blamed placed any blame at the Kremlin’s doorstep. The Obama administration did, however, call out North Korea for ordering last year’s cyber attack on Sony Pictures Entertainment.

The battle has begun. “External actors probe and scan [U.S. Department of Defense (DoD)] networks for vulnerabilities millions of times each day, and over 100 foreign intelligence agencies continually attempt to infiltrate DoD networks,” Eric Rosenbach, assistant secretary for homeland defense and global security, testified in April before the U.S. Senate Committee on Armed Services, Subcommittee on Emerging Threats and Capabilities. “Unfortunately, some incursions — by both state and nonstate entities — have succeeded.”

After years of debate as to how the fog of war will extend to the Internet, Obama last month signed an executive order declaring cyber attacks launched from abroad against U.S. targets a “national emergency” and levying sanctions against those responsible. Penalties include freezing the U.S. assets of cyber attackers and those aiding them as well as preventing U.S. residents from conducting financial transactions with those targeted by the executive order. [Continue reading…]