Robb calls this new type of conflict "open-source warfare," because the manner in which insurgent groups are organizing themselves, sharing information, and adapting their strategies bears a strong resemblance to the open-source movement in software development. Insurgent groups, like open-source software hackers, tend to form loose and nonhierarchical networks to pursue a common vision, Robb says. United by that vision, they exchange information and work collaboratively on tasks of mutual interest.
The reliance on IT also enables open-source groups to identify and respond to problems much more rapidly than a more structured, top-down entity can--be it the Pentagon or a large software company such as Microsoft. According to some estimates, it now takes Iraqi insurgents less than a month to adapt their methods of attack, much faster than coalition troops can respond. "For every move we make, the enemy makes three," U.S. Brigadier General Joe E. Ramirez Jr. told attendees at a May conference on IEDs. "The enemy changes techniques, tactics, and procedures every two to three weeks. Our biggest task is staying current and relevant."