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Most present symmetric encryption algorithms result from a tradeoff between implementation cost and resulting performances. In addition , they generally aim to be implemented efficiently on a large variety of platforms. In this paper, we take an opposite approach and consider a context where we have very limited processing resources and throughput(More)
While wearable computers are empowering fashion accessories, they bring with them a tangle of wires which connect their parts. As these subsystems begin to decouple and operate on less power, it becomes possible to wirelessly distribute their required data and power using to the wearer's body. We have demonstrated systems that transmit and receive both data(More)
Computer science has served to insulate programs and programmers from knowledge of the underlying mechanisms used to manipulate information, however this fiction is increasingly hard to maintain as computing devices decrease in size and systems increase in complexity. Manifestations of these limits appearing in computers include scaling issues in(More)
There are many models of computation, but they all share the same underlying laws of physics. Software can represent physical quantities, but is not itself written with physical units. This division in representations, dating back to the origins of computer science, imposes increasingly heroic measures to maintain the fiction that software is executed in a(More)
A non-contact sensor based on the interaction of a person with electric fields for human-computer interface is investigated. Two sensing modes are explored: an external electric field shunted to ground through a human body, and an external electric field transmitted through a human body to stationary receivers. The sensors are low power (milliwatts), high(More)
Low frequency electric fields provide a means to build contact and non-contact user interfaces that are unobtrusive, responsive, inexpensive, and simple to configure. In this paper, we outline the theory and implementation of such sensing techniques, contrasting them with more familiar alternatives. We then present a range of applications that we have(More)
We report on a project that explored emerging technologies for intuitive and unobtrusive information interfaces in a compelling setting. An installation at the Museum of Modern Art, New York, was part of a public exhibit and included an interactive table that presented information associated with the exhibit to the gallery visitors without visible(More)