Richard E. Newman

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Products implementing the HomePlug 1.0 standard allowing high-speed communication on low-voltage powerlines have recently started arriving on the U.S. market for home and office networking without the requirement for installing new wires. Effective use of the powerline bandwidth requires robust physical (PHY) and medium access control (MAC) protocols to(More)
Ensemble is an X-Windows based, object-oriented graphics editor based on the tgif graphics editor from UCLA. It relies on Unix* 4.3bsd sockets and can be used as a stand-alone program or as an application in the University of Florida’s distributed conferencing system (DCS). It uses implicitly placed write locks for concurrency control, with locks placed(More)
There have long been threads of investigation into covert channels, and threads of investigation into anonymity, but these two closely related areas of information hiding have not been directly associated. This paper represents an initial inquiry into the relationship between covert channel capacity and anonymity, and poses more questions than it answers.(More)
Although both anonymity and covert channels are part of the larger topic of information hiding, there also exists an intrinsic linkage between anonymity and covert channels. This linkage was illustrated in [1]; however, [1] just scratched the surface of the interplay between covert channels and anonymity, without a formal analysis of the related issues.(More)
Traditional methods for evaluating the amount of anonymity afforded by various Mix configurations have depended on either measuring the size of the set of possible senders of a particular message (the anonymity set size), or by measuring the entropy associated with the probability distribution of the messages possible senders. This paper explores further an(More)
This white paper describes the unique challenges associated with high speed digital communication over existing in-building powerlines. The solutions provided by the 14 Mbps HomePlug 1.0 protocol are described and an overview of the 200 Mbps HomePlug AV protocol is given. The latter protocol is optimized for multimedia voice and video services, while also(More)
In 2000, the HomePlug organization has developed the HomePlug 1.0 standard which became the basis for the world’s most widely deployed power line communication system. Now the organization is undertaking the task of developing the specifications for a second generation technology, HomePlug AV, which will be geared towards the distribution of voice, video,(More)
This paper considers systems for Traffic Analysis Prevention (TAP) in a theoretical model. It considers TAP based on padding and rerouting of messages and describes the effects each has on the difference between the actual and the observed traffic matrix (TM). The paper introduces an entropy-based approach to the amount of uncertainty a global passive(More)