davidwr writes: A security researcher and the Associated Press are reporting that hackers have infiltrated many of the United States' power grid networks. "About a dozen times in the last decade, sophisticated foreign hackers have gained enough remote access to control the operations networks that keep the lights on, according to top experts who spoke only on condition of anonymity due to the sensitive nature of the subject matter." Exfiltrated data included engineering plans and other non-public information that could aid an attacker later, as well as account credentials. Multiple companies were affected, but one of the more notable ones was the energy provider Calpine. "Circumstantial evidence such as snippets of Persian comments in the code helped investigators conclude that Iran was the source of the attacks. Calpine didn't know its information had been compromised until it was informed by Cylance, Kerr said."