The Defense Department must spend far more money defending its networks than hackers do attacking them, a trend that has to be reversed, Marine Corps Gen. James Cartwright, vice chairman of the Joint Chiefs of Staff, said last week. "The lines of code to attack any software haven't changed in the last five years, a number of them," Cartwright said during a roundtable discussion hosted by Government Executive . "What changes is, every time we get attacked, we have to...