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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)
  • William Joseph Butera, Bill Butera, V, Michael Bove, Edward Adelson, Neil Gershenfeld +1 other
  • 2002
A paintable computer is defined as an agglomerate of numerous, finely dispersed, ultra-miniaturized computing particles; each positioned randomly, running asynchronously and communicating locally. Individual particles are tightly resource bound, and processing is necessarily distributed. Yet computing elements are vanishingly cheap and are regarded as(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)