President Obama has announced he has signed a new executive order to help defend the United States from computer attacks overseas. The measure creates voluntary standards for network security and promotes information sharing with private companies that help run critical U.S. infrastructure. The order is part of a wide package of steps that include the Obama administration’s self-declared right to launch a preemptive cybermilitary strike on foreign targets should the White House deem it necessary to preempt an imminent computer attack from abroad.