Secure Key Distribution Using Correlated Randomness in Lasers Driven by Common Random Light

Yoshimura, Kazuyuki; Muramatsu, Jun; Davis, Peter; Harayama, Takahisa; Okumura, Haruka; Morikatsu, Shinichiro; Aida, Hiroki; Uchida, Atsushi

doi:10.1103/physrevlett.108.070602

Cited by 132 publications

(70 citation statements)

References 24 publications

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“…Fast chaotic laser outputs have been used for applications in fast physical random number generation [16][17][18], secure key distribution [19,20], and reservoir computing [21,22]. Figure 1 shows the decision-making scheme based on the TOW method using chaotic temporal waveforms of the semiconductor laser.…”

Section: Tug-of-war Methods Using a Chaotic Semiconductor Lasermentioning

confidence: 99%

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

et al. 2018

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We investigate the effect of a memory parameter on the performance of adaptive decision making using a tug-of-war method with the chaotic oscillatory dynamics of a semiconductor laser. We experimentally generate chaotic temporal waveforms of the semiconductor laser with optical feedback and apply them for adaptive decision making in solving a multiarmed bandit problem that aims at maximizing the total reward from slot machines whose hit probabilities are dynamically switched. We examine the dependence of making correct decisions on different values of the memory parameter. The degree of adaptivity is found to be enhanced with a smaller memory parameter, whereas the degree of convergence to the correct decision is higher for a larger memory parameter. The relations among the adaptivity, environmental changes, and the difficulties of the problem are also discussed considering the requirement of past decisions. This examination of ultrafast adaptive decision making highlights the importance of memorizing past events and paves the way for future photonic intelligence.

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Section: Tug-of-war Methods Using a Chaotic Semiconductor Lasermentioning

confidence: 99%

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

et al. 2018

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“…Equation (1) simplifies to the binary expansion for β = 2. In the case of β encoder, β is in (1,2). For a fixed x, a 1 a 2 · · · are not unique.…”

Section: Introductionmentioning

confidence: 99%

“…The output of PCM is a truncated binary expansion of the input value. The quantization error is upper bounded by 2 −(N − 1) , where N is the number of bits for binary expansion. However, this upperbound cannot be guaranteed if N becomes very large.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, there are demands, especially for security purposes, for a physical random number generator that uses measurements of a certain physical phenomenon. Examples of physical random number generation include a random number generator using a semiconductor laser [1] or one that uses an electronic circuit based on a chaotic map [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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A <I>β</I>-ary to binary conversion for random number generation using a <I>β</I> encoder

Jitsumatsu

Matsumura

2016

NOLTA

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Abstract:A β encoder is an analog-to-digital (A/D) converter, proposed by Daubechies et al. in 2002, that outputs a truncated sequence of β expansion of an input value x. It is known that the conventional pulse code modulation (PCM) that outputs the binary expansion of x is sensitive to the offset of the threshold voltage, while a β encoder is robust to such an offset. We propose an algorithm that calculates the binary expansion of an interval that is identified by an output sequence from a β encoder. Such a method is referred to as a β-ary to binary converter. We generate sequences of random numbers, using a hardware β encoder followed by the β-ary to binary converter. The randomness of the generated binary random numbers is verified by the National Institute of Standards and Technology (NIST) statistical test suite.

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“…The achievement of CNIS in the optical phases suggests new potential for the control of optical phase dynamics using ASE light, although such light has been so far considered as a source that disturbs laser coherence. This CNIS by ASE light could be useful for applications in communications, including a recently proposed secure key distribution scheme [16].…”

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Optical Phase Synchronization by Injection of Common Broadband Low-Coherent Light

et al. 2014

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We demonstrate experimentally and numerically that, by injecting common broadband optical noise into two uncoupled lasers, the phases of the respective laser oscillations can be successfully synchronized. Experimental observation of the resulting phase dynamics is achieved using a heterodyne detection method. The present phase synchronization differs from the synchronization induced by coherent light signals or narrow band optical noise in the sense that it occurs without any frequency locking to the injection light. Moreover, it is revealed that there is an optimal intensity of the injection light that maximizes the quality of the phase synchronization. These results can open new perspectives for understanding and functional utilization of the laser phase dynamics.

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Secure Key Distribution Using Correlated Randomness in Lasers Driven by Common Random Light

Cited by 132 publications

References 24 publications

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

A <I>β</I>-ary to binary conversion for random number generation using a <I>β</I> encoder

Optical Phase Synchronization by Injection of Common Broadband Low-Coherent Light

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Secure Key Distribution Using Correlated Randomness in Lasers Driven by Common Random Light

Cited by 132 publications

References 24 publications

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

Memory Effect on Adaptive Decision Making with a Chaotic Semiconductor Laser

A <I>&beta;</I>-ary to binary conversion for random number generation using a <I>&beta;</I> encoder

Optical Phase Synchronization by Injection of Common Broadband Low-Coherent Light

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A <I>β</I>-ary to binary conversion for random number generation using a <I>β</I> encoder