JP2007251998A5

JP2007251998A5 -

Info

Publication number: JP2007251998A5
Application number: JP2007158655A
Authority: JP
Filing date: 2007-06-15
Publication date: 2007-12-13
Anticipated expiration: 2021-07-26

Claims

An optical signal generator for generating optical pulses;
By inputting the optical pulses generated by the optical signal generation unit, monitoring whether the number of input optical pulses is greater than a predetermined number within a certain period,
When a predetermined number of optical pulses have been generated, output a predetermined number of optical pulses input from the optical signal generator,
When more optical pulses are generated than the predetermined number, a predetermined number of optical pulses are output from the optical pulses input from the optical signal generator, and more than the predetermined number. A light source light check unit that does not output the generated light pulse;
With
The quantum cryptography receiver characterized by the above-mentioned.

In a quantum cryptography system that generates quantum cryptography using light pulses that pass through a transmission line,
An optical signal generator for generating an optical pulse having a predetermined intensity;
The optical pulse having the predetermined intensity generated by the optical signal generator is input, and it is monitored whether or not the number of input optical pulses is larger than a predetermined number within a certain period. do it,
When a predetermined number of optical pulses have been generated, output a predetermined number of optical pulses having the predetermined intensity input from the optical signal generator,
When more optical pulses than the predetermined number are generated, a predetermined number of optical pulses having the predetermined intensity are output from the optical pulses input from the optical signal generator, A light source light check unit that does not output light pulses generated more than the generated number
A quantum cryptography receiving device having:
An optical monitoring section that monitors the intensity of the optical pulse passing through the transmission path,
Strength of the monitored the light pulse by the light monitoring unit, and a detection unit for detecting whether strong or not than a predetermined intensity with the light pulses output by the quantum cryptography receiving apparatus
A quantum cryptography transmitter having
A quantum cryptography system characterized by comprising:

In a quantum cryptography system that generates quantum cryptography using light pulses that pass through a transmission line,
An optical signal generator for generating an optical pulse having a predetermined pulse type;
Whether an optical pulse having the predetermined pulse type generated by the optical signal generator is input and whether the number of input optical pulses is greater than a predetermined number within a certain period is determined. Monitor
When a predetermined number of optical pulses have been generated, an optical pulse having a predetermined number of the predetermined pulse types input from the optical signal generator is output,
When more than a predetermined number of optical pulses are generated, a predetermined number of optical pulses having the predetermined pulse type are output from the optical pulses input from the optical signal generator, A light source light check unit that does not output light pulses generated more than a predetermined number;
A quantum cryptography receiving device having:
An optical monitor unit for monitoring the pulse type of the optical pulse passing through the transmission line;
A detection unit for detecting whether or not a pulse type of the optical pulse monitored by the optical monitor unit matches a predetermined pulse type output by the quantum cryptography reception device;
A quantum cryptography transmitter having
A quantum cryptography system characterized by comprising:

In a quantum cryptography system that generates quantum cryptography using light pulses that pass through a transmission line,
An optical signal generator for generating optical pulses;
By inputting the optical pulse generated by the optical signal generation unit, monitoring whether or not the number of pulses of the input optical pulse is generated more than a predetermined number of pulses within a certain period,
When an optical pulse with a predetermined number of pulses has been generated, an optical pulse with a predetermined number of pulses input from the optical signal generator is output,
When more optical pulses are generated than the predetermined number of pulses, the optical pulse having the predetermined number of pulses is output from the optical pulses input from the optical signal generator, and the predetermined number of pulses is output. A light source light check unit that does not output more light pulses generated more than
A quantum cryptography receiving device having:
An optical monitor for monitoring the number of pulses within a certain period of optical pulses passing through the transmission path;
A detection unit for detecting whether or not the number of pulses monitored by the optical monitoring unit within a certain period is greater than a predetermined number of pulses output within a certain period by the quantum cryptography receiving device;
A quantum cryptography transmitter having
A quantum cryptography system characterized by comprising:

In the quantum cryptography system for generating a quantum cryptography using light pulses passing through the transmission path,
An optical signal generator for generating an optical pulse having a predetermined pulse type;
Whether an optical pulse having the predetermined pulse type generated by the optical signal generator is input and whether the number of input optical pulses is greater than a predetermined number within a certain period is determined. Monitor
When a predetermined number of optical pulses have been generated, an optical pulse having a predetermined number of the predetermined pulse types input from the optical signal generator is output,
When more than a predetermined number of optical pulses are generated, a predetermined number of optical pulses having the predetermined pulse type are output from the optical pulses input from the optical signal generator, A light source light check unit that does not output light pulses generated more than a predetermined number;
A quantum cryptography receiving device having:
An optical monitor unit for monitoring the pulse type of the optical pulse passing through the transmission line;
Pulse type of the monitored by the optical monitoring section the light pulse, a detection unit for detecting whether matches a predetermined pulse type output by the quantum cryptography receiving apparatus,
An optical filter that passes an optical pulse having a frequency that matches a predetermined frequency range and blocks an optical pulse having a frequency that does not match the predetermined frequency range among the optical pulses that pass through the transmission path. And
Quantum cryptography system comprising the <br/> the quantum cryptography transmitting apparatus having.

An optical signal generating step for generating an optical pulse;
Input the optical pulses generated by the optical signal generation step, and monitor whether the number of input optical pulses is greater than a predetermined number within a certain period,
When a predetermined number of optical pulses have been generated, the predetermined number of optical pulses input by the optical signal generation step are output,
When more optical pulses are generated than the predetermined number, a predetermined number of optical pulses are output from the optical pulses input by the optical signal generation step, and the number is larger than the predetermined number. A light source light check process that does not output the generated light pulses;
A quantum cryptography reception method comprising:

In a quantum cryptography transmission / reception method of a quantum cryptography system comprising: a quantum cryptography reception device that outputs an optical pulse that passes through a transmission path; and a quantum cryptography transmission device that uses an optical pulse output from the quantum cryptography reception device.
An optical signal generating step of generating an optical pulse having a predetermined intensity and passing through a transmission line by a quantum cryptography receiver;
The quantum cryptography receiving device inputs the optical pulse having the predetermined intensity generated by the optical signal generation step, and the number of input optical pulses is generated more than a predetermined number within a certain period. Monitor whether or not
When a predetermined number of optical pulses have been generated, output a predetermined number of optical pulses having the predetermined intensity input by the optical signal generation step,
When more optical pulses than the predetermined number are generated, a predetermined number of optical pulses having the predetermined intensity are output from the optical pulses input by the optical signal generating step, and the predetermined number is determined. A light source light check process that does not output more light pulses than the generated number;
An optical monitoring step of monitoring the intensity of an optical pulse passing through the transmission path by a quantum cryptography transmission device ;
The quantum cryptography transmitting apparatus, the intensity of the monitored the light pulse by said light monitoring step, and a detection step of detecting whether strong or not than a predetermined intensity with the light pulses output by the quantum cryptography receiving apparatus quantum cryptography transmission reception method characterized by the.

In a quantum cryptography transmission / reception method of a quantum cryptography system comprising: a quantum cryptography reception device that outputs an optical pulse that passes through a transmission path; and a quantum cryptography transmission device that uses an optical pulse output from the quantum cryptography reception device.
An optical signal generating step of generating an optical pulse having a predetermined pulse type by the quantum cryptography receiver;
Whether a predetermined number of optical pulses generated by the optical signal generation step are input by the quantum cryptography receiving device, and the number of input optical pulses is greater than a predetermined number within a certain period. Monitoring whether or not
When a predetermined number of light pulses have been generated, output a predetermined number of light pulses having the predetermined pulse type input by the optical signal generation step,
When more than a predetermined number of optical pulses are generated, a predetermined number of optical pulses having the predetermined pulse type are output from the optical pulses input by the optical signal generation step, A light source light check process that does not output light pulses generated more than a predetermined number;
An optical monitoring step of monitoring a pulse type of an optical pulse passing through the transmission path by a quantum cryptography transmission device;
A detection step of detecting whether or not a pulse type of the optical pulse monitored by the optical monitoring step matches a predetermined pulse type output by the quantum cryptography reception device by a quantum cryptography transmission device;
A quantum cryptography transmission / reception method comprising:

In a quantum cryptography transmission / reception method of a quantum cryptography system comprising: a quantum cryptography reception device that outputs an optical pulse that passes through a transmission path; and a quantum cryptography transmission device that uses an optical pulse output from the quantum cryptography reception device.
An optical signal generating step of generating an optical pulse having a predetermined pulse type by the quantum cryptography receiver;
The quantum cryptography receiver inputs the optical pulses generated by the optical signal generation step, and monitors whether the number of input optical pulses is greater than a predetermined number within a certain period. do it,
When a predetermined number of light pulses have been generated, output a predetermined number of light pulses having the predetermined pulse type input by the optical signal generation step,
When more than a predetermined number of optical pulses are generated, a predetermined number of optical pulses having the predetermined pulse type are output from the optical pulses input by the optical signal generation step, A light source light check process that does not output light pulses generated more than a predetermined number;
An optical monitoring step of monitoring a pulse type of an optical pulse passing through the transmission path by a quantum cryptography transmitter;
A detection step of detecting whether a pulse type of the optical pulse monitored by the optical monitoring step matches a predetermined pulse type output from the quantum cryptography reception device by a quantum cryptography transmission device;
An optical pulse having a frequency that matches a predetermined frequency range among optical pulses that pass through the transmission path is allowed to pass through the quantum cryptography transmission device, and an optical pulse having a frequency that does not match the predetermined frequency range A quantum cryptography transmission / reception method comprising: an optical filter step for blocking passage.