In sports, there's a saying that the best offense is a good defense. The same is true for computer security, according to University of Colorado at Boulder researcher John Black. Black and CU-Boulder graduate student Martin Cochran and undergraduate student Ryan Gardner tested the security of the popular Web-based Internet Chess Club and showed that the site wasn't secure. In fact, they proved users could cheat rather easily. Internet Chess Club has more than 30,000 members worldwide and claims Madonna, Nicolas Cage, Will Smith and Gary Kasparov as players.