The Shadow Group knows.
Hackers have help breaking into government networks.
They share their resources and techniques on special mail lists and encrypted chat areas. Government security administrators are taking a similar team approach to combat the intruders. A small group of government network security experts has been using the method with industry counterparts. The exchanges have helped them form a consensus, though not full agreement, on what to do when an intruder penetrates a private network via the Internet. The Shadow group includes representatives from several Defense Department sites, the Geological Survey and Energy's Los Alamos National Laboratory.