Photon-number distinguishable detection-based true random number generator

A technology of true random number and photon counter, applied in the field of true random number generator, to achieve the effect of stable and reliable random source

Inactive Publication Date: 2012-10-24
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, no matter what kind of classical system, the theoretical noise or random quantity evolves with time, and the influence of external factors on the classical system also exists, so these methods are not the best method for generating random numbers

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  • Photon-number distinguishable detection-based true random number generator

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Embodiment Construction

[0019] Hereinafter, the features of the present invention and other related features will be further described in detail through embodiments in conjunction with the accompanying drawings, so as to facilitate the understanding of those skilled in the industry:

[0020] The basic quantities of quantum mechanics are completely random because they are unpredictable, irregular and will not repeat. Therefore, the true randomness shown by the basic quantities of quantum mechanics in some aspects can be used to generate true random numbers. As we all know, a certain intensity of coherent light source has the characteristics of Poisson photon number statistics, and for the detection of coherent light, the result also conforms to the Poisson distribution. For example, if the light intensity is adjusted so that the average number of photons contained per pulse is 2, but in fact the number of photons detected each time is uncertain, it can be different values ​​such as 0, 1, 2, 3, but accordi...

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Abstract

The invention discloses a photon-number distinguishable detection-based true random number generator and belongs to the class of quantum secure communication. Different photon-number incident events are combined into a 2-bit random number sequence according to the uncertainty principle of poisson distribution by using the characteristics of a photon-number distinguishable detector capable of distinguishing incident photon numbers. The true random number generator mainly comprises a photon-number distinguishable detection module, a photon-number identifying and processing module and a random number acquisition module and can generate high-speed random secret keys needed in the quantum secure communication. The true random number generator has stable and reliable random sources; the generated true random number cannot be repeated or deciphered by the random characteristics of light quanta; a complex post-processing procedure is not needed; and the true random number generator is convenient to use.

Description

Technical field [0001] The invention belongs to the quantum secret communication category, and specifically refers to a true random number generator based on the resolvable detection of photon numbers, which is used to realize the generation of high-speed random keys required in quantum secret communication. Background technique [0002] With the advent of the global information age, information security has become a common concern of all countries. In the quantum secure communication system, the random number plays an extremely critical role. It acts as a mask and is loaded on a single photon through a phase modulator, and then transmitted to the legal receiving end of the communication. If the random number used as the mask is not a true random number, the encoded information may be deciphered by a third-party eavesdropper, thereby threatening the security of communication. Therefore, how to generate stable and secure true random numbers has become a crucial link in the quantu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/58
Inventor 简轶梁焰任旻吴光武愕潘海峰曾和平
Owner EAST CHINA NORMAL UNIV
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