NUMBER OF HIGH-POWER SUBSTATIONS IN THE U.S.
Like your home computer, the one at your local power substation needs regular virus scans and software patches. But it, and other devices embedded in the grid, lack the capacity to keep up with these frequent fixes. Instead of constant updates, Dartmouth College researchers developed a software patch called Autoscopy Jr. It lightly scans vital functions to identify signs, such as unexpected code lengths and timing hiccups, of a compromised system.