coolnumbr12 writes "A 2009 study (PDF) by the McAfee estimated that hacking costs the global economy $1 trillion. It turns out that number was a massive exaggeration by McAfee, a software security branch of Intel that works closely with the U.S. government at the local, state and federal level. A new estimate by the Center for Strategic and International Studies (and underwritten by McAfee) suggests the number is closer to closer to $300 billion (PDF), but even that much is uncertain. One of McAfee's clients, the Department of Defense, has used the $1 trillion estimate to argue for an expansion of cybersecurity, including 13 new teams dedicated to cyberwarfare. Despite the new data, Reuters said McAfee is still trying to exaggerate the numbers."
The $1 trillion study has seen other criticism as well
, so the new data is a step in the right direction.