P.D.: New security architectures based on emerging disk functionality

Computers are more complex than ever before. Their increased capabilities mean that previously-unimagined functionality is now available to the average user. This increase in power and functionality has come at the cost of increased complexity of the operating systems that control these systems. Modern OSes have increased their available features, the complexity of their graphical interfaces, and their compata-bility with a vast array of external peripherals. The net result of this has been an explosion in their size. For example, Windows NT 1.0 comprised approximately 4-5 million lines of code and had a development team of 200; by contrast, Windows XP consisted of approximately 40 million lines of code, with an 1,800-member development team [9]. In addition to using these larger operating systems, users are interacting with large-scale programs such as web broswers and office suites, with codebases comprising millions of lines of code. Furthermore, the scope of who users communicate with has expanded to include potentially anyone in the world, thanks to the ubiquity and accessibility of the Internet. Combining the size and complexity of applications and operating sytems with the almost limitless interactions possible between users and remote parties means that fully understading every facet of their operations is virtually impossible. In particular, securing these systems is an extraordinarily difficult proposition. As the demands on computers have grown, storage has risen to the challenge and has undergone signif