Boom Worm (IMAGE) University of Southern California Caption This is a visualization of an experiment conducted in the DETER testbed studying both the spreading of malicious code through the Internet and that code initiating a distributed denial of service attack against a target in North America. The large dots represent subnets that have been infected by the spreading worm and have become sources for the attack. The small dots represent streams of packets being sent at the target. The visualization simultaneously shows malicious code quickly spreading worldwide and small, distributed transmissions funneling together into a torrent of disruptive packets. Credit USC Information Sciences Institute Usage Restrictions credit USC Information Sciences Institute License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.