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Quantum encryption communication device, quantum encryption communication method and quantum encryption communication system

A technology of quantum encryption and communication equipment, which is applied in photon quantum communication, synchronous sending/receiving encryption equipment, and key distribution, which can solve the problems of key exposure and achieve the effect of simple structure

Inactive Publication Date: 2016-08-03
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a shared key encryption system, if a so-called "brute force attack" using brute force to search the key is performed, there is a high possibility that the key will be exposed

Method used

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  • Quantum encryption communication device, quantum encryption communication method and quantum encryption communication system
  • Quantum encryption communication device, quantum encryption communication method and quantum encryption communication system
  • Quantum encryption communication device, quantum encryption communication method and quantum encryption communication system

Examples

Experimental program
Comparison scheme
Effect test

no. 2 example

[0032] 4. The third embodiment

no. 5 example

[0035]

[0036] figure 1 is a diagram illustrating the overall structure of a quantum encryption communication system. The quantum encryption communication system 10 includes a transmitting quantum encryption communication device (hereinafter referred to as “transmitting communication device”) 20 and a receiving side quantum encryption communication device (hereinafter referred to as “receiving communication device”) 30 . The transmitter communication device 20 and the receiver communication device 30 are connected to each other through a quantum communication line 51 and a conventional communication line 55 .

[0037] The transmitting side communication device 20 includes a light source unit 21 , a polarization modulation unit 22 , a key storage 23 , an encryption / decoding unit 24 , a communication unit 25 and a controller 26 .

[0038] The light source unit 21 is constituted by a semiconductor light emitting device such as a laser diode or LED, a lens that collimates ligh...

no. 3 example

[0133] In quantum encryption communication, for example, as described in "Secret key can be obtained from both compatible and in compatible measurements in thesix-state QKD protocol" (Matsumoto Ryutaro, IEICE Technical Report IT2007-43, ISEC20070140, WBS2007-74 (2008-02)) and the like, it is possible to use (hereinafter referred to as 6-state protocol). Thus, in the third embodiment, the case of performing quantum key distribution by using six polarization states including the four linear polarizations and the two circular polarizations will be described.

[0134]

[0135] Figure 7 The structure of the third embodiment is illustrated. in addition, Figure 7 Illustration figure 1 The structures of the light source unit 21 , the polarization modulation unit 22 , the optical unit 31 and the light receiving unit 32 are illustrated in FIG.

[0136] The light source unit 21 of the transmitting side communication device 20 is constituted using a semiconductor light emitting de...

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Abstract

Provided is a quantum encryption communication apparatus of a transmission side which performs a communication process based on quantum encryption, including: a light source unit which generates a light pulse; a polarization modulating unit which performs polarization modulation of the light pulse by using a variable wavelength plate; and a controller which drives the variable wavelength plate to convert a polarization state of the light pulse to one of a plurality of predetermined polarization bases at random.

Description

technical field [0001] The present disclosure relates to a quantum encryption communication device, a quantum encryption communication method, and a quantum encryption communication system, and more specifically, to a miniaturized quantum encryption communication device for performing quantum encryption communication, which can be mounted on portable electronic devices and the like. Background technique [0002] Conventionally, in communications performed on the Internet or the like, encryption technology is used to maintain security. Encryption systems are mainly classified into two types of encryption systems, namely, common key encryption systems and public key encryption systems. For example, at present, AES (Advanced Encryption Standard) or the like has been widely used as a common key encryption system, and RSA or the like has been widely used as a public key encryption system. [0003] In a shared key encryption system, both communicating parties keep a shared secret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04B10/70H04L9/12
CPCH04B10/70H04L9/0858
Inventor 浮田昌一川元洋平田中雄
Owner SONY CORP
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