A Memristor True Random-Number Generator

Noise in a compact resistive memory could bring true random digits to low-power logic

3 min read
Overhead image of numbers
Photo: iStockphoto

imgContact RRAM: The resistive memory cell sits between a tungsten contact and the transistor's drain region.Photo: National Tsing Hua University

12 July 2012—Engineers in Taiwan say they’ve invented a tiny low-power circuit based on memristors that could improve the security of data transmission over the Internet and of using Near Field Communication (NFC) from smartphone wallets. The security of many digital transactions depends on generating truly random numbers, something that’s difficult to do using today’s digital circuits, which typically produce numbers that aren’t completely random. The new memristor circuit rapidly spits out true random numbers while consuming less energy compared with other techniques, according to research in an upcoming issue of IEEE Electron Device Letters.

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The Transistor of 2047: Expert Predictions

What will the device be like on its 100th anniversary?

4 min read
Six men and a woman smiling.

The luminaries who dared predict the future of the transistor for IEEE Spectrum include: [clockwise from left] Gabriel Loh, Sri Samavedam, Sayeef Salahuddin, Richard Schultz, Suman Datta, Tsu-Jae King Liu, and H.-S. Philip Wong.

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The 100th anniversary of the invention of the transistor will happen in 2047. What will transistors be like then? Will they even be the critical computing element they are today? IEEE Spectrum asked experts from around the world for their predictions.

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