...the U.S. can defend itself by blocking cyber intrusions and taking down servers in another country. And, as in cases of mortar or missile attacks, the U.S. has the right to pursue attackers across national boundaries — even if those are virtual network
lines. Under the new Pentagon guide
lines, it would be unacceptable to deliberately route a cyberattack through another country if that nation has not given permission — much like U.S. fighter jets need permission to fly through another nation’s airspace. Uri Friedman over at the Atlantic Wire distills...