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While intrusion detection systems are becoming ubiquitous defenses in today's networks, currently we have no comprehensive and scientifically rigorous methodology to test the effectiveness of these systems. This paper explores the types of performa nce measurements that are desired and that have been used in the past. We review many past evaluations that(More)
An important goal of the 1999 DARPA Intrusion Detection Evaluation was to promote the development of intrusion detection systems that can detect new attacks. This thesis describes UNIX attacks developed for the 1999 DARPA Evaluation. Some attacks were new in 1999 and others were stealthy versions of 1998 User-to-Root attacks designed to evade network-based(More)
Embedded parallel and distributed computing systems for real-time applications are becoming commonplace. Many such real-time applications are life-critical and require extensive fault-tolerance capabilities in order to ensure very high reliability. At the same time, cost, power, weight, and volume constraints require that any introduced redundancy must be(More)
The Transformational Satellite Communications System (TSAT) is poised to become the DoD's next generation protected and processed satellite system. This paper describes the network architecture of the TSAT system. The presence of a high capacity IP router on the satellite pay-load is a key distinguishing feature of the TSAT system. The TSAT payload also(More)
As multiprocessor systems become more complex, their reliability will need to increase as well. In this paper we propose a novel technique which is applicable to a wide variety of distributed real-time systems, especially those exhibiting data parallelism. We assert that for high reliability, a combination of system-level fault tolerance and(More)
While intrusion detection systems are becoming ubiquitous defenses in today's networks, currently we have no comprehensive and scientifically rigorous methodology to test the effectiveness of these systems. This paper explores the types of performa nce measurements that are desired and that have been used in the past. We review many past evaluations that(More)
The Transformational Satellite Communications System (TSAT) is the DoD's next generation geosynchronous satellite communications constellation. The TSAT system features packet and circuit interfaces that support a wide variety of military missions by providing communication services to fixed ground, mobile ground, marine, and airborne terminals. These(More)
Opinions, interpretations, conclusions, and recommendations are those of the author and are not necessarily endorsed by the United States Air Force. Abstract An important goal of the 1999 DARPA Intrusion Detection Evaluation was to promote the development of intrusion detection systems that can detect new attacks. This thesis describes UNIX attacks(More)
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