As anyone who regularly games online can attest, DDoS (dedicated denial of service) attacks are an irritatingly common occurrence on the internet. Drawing on the combined digital might of a geographically diffuse legion of zombified PCs, hackers can swamp game servers and prevent players from logging on for hours or days at a time. The problem has metastasized in recent years as enterprising hackers have begun to package their botnets and spamming tools into commercial offerings, allowing any
