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Teachers of physics make a breakthrough in design of physical random number generator

Published: 2011-04-26

Associate Professor, Xiaowen Li, working with colleagues from Maryland University, has made a breakthrough in the design of a physical random number generator. Their design, a multipass, independent and high-speed physical random number generator, uses broadband optical noise obtained from the amplification of spontaneous radiation by a super-luminescent diode. The design utilizes a pair of non-overlapping spectral filters to produce two independent 10 Gb/s random bit streams. The method, using a parallel random bit to produce several bits at the same time, greatly elevates the generation rate and upgrading ability of the random number generator.

Previously, scientists had proposed the algebraic (software method) and cellular automation-based (hardware method) parallel pseudo-random number generator. Xiaowen Li and colleagues first proved that several independent bit streams can be gotten at the same time from a single optical source, without optical amplification and gain from the outside. This new development is the first parallel output physical truly random number generator thus far, and has made an important step to the chip-based ultra-fast physical random number generator. In addition, using more filters makes at least 20 parallel output passes, and the total bit rate can be 200G/s.

The random number generator is widely used in the field of business and science, including the generation of safe key, communication, gaming and the Monte Carlo procedure. Parallel computation of high-performance computers requires parallel random numbers, which provokes the use of commercial electro-optical devices that are easily integrated on a chip in order to make high-performance random number generator for computers.
  
A few days ago, Vertical News, an American media outlet, which introduces new insights in science, reported this research result.


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