Online hackers are using a simple but effective technique called "distributed denials of service" to bring down Web sites. The idea is to flood the target site with so much traffic, that it overwhelms the server.
A group of hackers called "anonymous" has been using this tactic against the Church of Scientology. Their problem isn't with the religion, they say, but the control of information.
Andrea Seabrook gets the story from Ryan Singel of Wired.com and Keith Laslop of the internet security company Prolexic.