Steve Graham

Learn More
Law enforcement agencies need the ability to conduct electronic surveillance to combat crime, terrorism, or other malicious activities exploiting the Internet. However, the proliferation of anonymous communication systems on the Internet has posed significant challenges to providing such traceback capability. In this paper, we develop a new class of flow(More)
The OASIS Web Services Notification (WSN) family of specifications defines a standard interoperable protocol through which Web services can disseminate events. We present here a summary of three WSN specification documents that are currently available: WS-Base Notification, WS-Topics, and WS-Brokered Notification. We conclude with a brief discussion on the(More)
— Honeypots are decoys designed to trap, delay, and gather information about attackers. We can use honeypot logs to analyze attackers' behaviors and design new defenses. A virtual honeypot can emulate multiple honeypots on one physical machine and provide great flexibility in representing one or more networks of machines. But when attackers recognize a(More)
Although a significant amount of effort has been directed at discovering attacks against anonymity communication networks and developing countermeasures to those attacks, there is little systematic analysis of the Quality of Service (QoS) for such privacy preserving systems. In this paper, we initiate the effort to study the QoS of Tor, a popular anonymous(More)
—Anonymity technologies such as mix networks have gained increasing attention as a way to provide communication privacy. Mix networks were developed for message-based applications such as email, but researchers have adapted mix techniques to low-latency, flow-based applications such as anonymous web browsing. Although a significant effort has been directed(More)
Whereas preterm birth has consistently been associated with low maternal pre-pregnancy weight, the relationship with high pre-pregnancy weight has been inconsistent. We quantified the pre-pregnancy BMI-preterm delivery (PTD) relationship using traditional BMI categories (underweight, normal weight, overweight and obese) as well as continuous BMI. Eligible(More)
Precursor-to-product ratios in steroid hormone metabolism may accurately reflect enzymatic activity and production of metabolites relative to their disappearance. The purpose of this study was to explore the use of direct precursor-to-product steroid ratios to discriminate between infants with congenital adrenal hyperplasia (CAH) due to 21-α-hydroxylase(More)
  • 1