One hindrance to this flow of information is not a lack of creative minds to dream up new services nor lack of an educated workforce to develop enabling technology, but the pres- ence of mistake and malice, error and evil. The growing interconnectedness of networks means that systems are open to disruptions from a larger number of machines, software, and users that can foul the system with faults, bugs, and error. And it is now very clear that we must also deal with a growing population of Internet-savvy criminals bent on financial gain, foreign governments looking for military and trade secrets,.