We would like to thank Zvi Kedem, who suggested using different priority levels to efficiently control a sandboxed process' CPU usage, and Anatoly Akkerman and Arash Baratloo for their help with implementing the sandbox on Linux. We also thank Lionell Griffith for giving us his implementation of fine-grained timers on Windows NT.
This research was sponsored by the Defense Advanced Research Projects Agency under agreement numbers F30602-96-1-0320, F30602-99-1-0157, and N66001-00-1-8920; by the National Science Foundation under CAREER award number CCR-9876128; and Microsoft. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright annotation thereon. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Defense Advanced Research Projects Agency, Rome Laboratory, SPAWAR SYSCEN, or the U.S. Government.