192 km relay transmission and HDTV transmission experiments by Quantum Yuen-2000 transceiver

Akutsu, Shigeto; Doi, Yoshifumi; Hosoi, T.; Honda, Makoto; Harasawa, Katsuyoshi; Hirota, Osamu; Katayama, Tatsuya

doi:10.1063/1.3131340

Cited by 6 publications

(3 citation statements)

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“…This encryption system can transmit HDTV without compression (see Figure 2). 7 The system is classified as a device-limit-assisted ASK-Y00. That is, the eavesdropper's ciphertext is completely randomized by the quantum noise and imperfect resolution of the ADC.…”

Section: Figure 2 High-definition Tv Field-transmission Test Using Amentioning

confidence: 99%

Getting around the Shannon limit of cryptography

Hirota¹

2010

SPIE Newsroom

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Section: Figure 2 High-definition Tv Field-transmission Test Using Amentioning

confidence: 99%

Getting around the Shannon limit of cryptography

Hirota¹

2010

SPIE Newsroom

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“…The challenge of developing such a scheme, so far, was to realize systems of 2.5 Gbit/sec for 200 km fiber transmission by schemes of multi signal phase modulation (M -ary PSK) [1,2] or amplitude (or intensity) modulation (M -ary ASK) [3], and it has recently been realized for HDTV transmission system [4]. Although there are many implementation methods of the Y-00 cipher system, the amplitude (or intensity) modulation scheme has remarkable advantage in implementing the system, which is applicable to very high speed fiber link and also satellite link with high power laser.…”

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confidence: 99%

Experiments of 10 Gbit/sec quantum stream cipher applicable to optical Ethernet and optical satellite link

et al. 2009

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The security issue for the next generation optical network which realizes Cloud Computing System Service with data center" is urgent problem. In such a network, the encryption by physical layer which provide super security and small delay should be employed. It must provide, however, very high speed encryption because the basic link is operated at 2.5 Gbit/sec or 10 Gbit/sec. The quantum stream cipher by Yuen-2000 protocol (Y-00) is a completely new type random cipher so called Gauss-Yuen random cipher, which can break the Shannon limit for the symmetric key cipher. We develop such a cipher which has good balance of the security, speed and cost performance. In SPIE conference on quantum communication and quantum imaging V, we reported a demonstration of 2.5 Gbit/sec system for the commercial link and proposed how to improve it to 10 Gbit/sec. This paper reports a demonstration of the Y-00 cipher system which works at 10 Gbit/sec. A transmission test in a laboratory is tried to get the basic data on what parameters are important to operate in the real commercial networks. In addition, we give some theoretical results on the security. It is clarified that the necessary condition to break the Shannon limit requires indeed the quantum phenomenon, and that the full information theoretically secure system is available in the satellite link application.

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“…3 This is something we recently achieved in our research. 4 In the real world, however, next-generation networks will require basic fiber links of 10Gb/s and very high power lasers for secure satellite-based communications. Here, we describe the performance of Y-00 by ASK at 10Gb/s using a high-speed digital to analog converter (DAC).…”

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confidence: 99%