“It’s not a matter of isolated incidents; it’s a continuous invasion.” Dell’s director of malware research attempts to trace a series of attacks back to their source—in this case, China, and a man named Zhang Changhe:

“Up to now, private-sector researchers such as Stewart have had scant success putting faces to the hacks. There have been faint clues left behind—aliases used in domain registrations, old online profiles, or posts on discussion boards that give the odd glimpse of hackers at work—but rarely an identity. Occasionally, though, hackers mess up. Recently, one hacker’s mistakes led a reporter right to his door.”