CN204128683U - Single-photon detector high light blinding monitoring device - Google Patents
Single-photon detector high light blinding monitoring device Download PDFInfo
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- CN204128683U CN204128683U CN201420410889.6U CN201420410889U CN204128683U CN 204128683 U CN204128683 U CN 204128683U CN 201420410889 U CN201420410889 U CN 201420410889U CN 204128683 U CN204128683 U CN 204128683U
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Abstract
The utility model discloses a kind of single-photon detector high light blinding monitoring device, comprise temperature control circuit module, PIN photodiode, bias voltage setting module and shaping pulse and alerting signal generation module; The high light narrow pulse signal that PIN photodiode is used for assailant sends converts short duration current to, and exports and the directly proportional burst pulse voltage of short duration current; Shaping pulse and circuit become for burst pulse voltage transitions PIN photodiode exported can by the fiduciary level of follow-up main control chip identification; Bias voltage setting module is for arranging the reverse bias voltage be added in PIN photodiode.The utility model circuit is simple, cost is low, when there is intensity light attack signal in quantum channel, can monitor immediately and send alerting signal to host computer, ensure that the absolute safety of quantum key communication system.
Description
Technical field
Utility model relates to the monitoring device and method attacked for " high light blinding " in quantum key dispatching system, particularly relates to a kind of single-photon detector high light blinding monitoring device.
Background technology
Quantum key dispatching system (QKD) utilizes fundamental principles of quantum mechanics to produce and issues key, ensures being perfectly safe of distribution.Why quantum can accomplish the distribution that communicating pair is perfectly safe if distributing, one of reason adopts single photon carry information, if listener-in expects information, the single photon of this carry information must be intercepted, so do not receive this photon by fourth Bob, so can notify that the information of this photon is abandoned by Alice.According to the principle of physics wave-particle duality, can only be collapsed to some when single photon is measured, can not be divided again, thus listener-in not by shunting method obtaining information and not discover by communicating pair.The information that single photon carries in addition can not be replicated, for listener-in, the status information of the single photon transmitted in channel is uncertain, and in order to ensure security, this status information is adopted very random method to carry out selection coding by Alice, so when we adopt multiple state to carry out random coded, listener-in is unknown for the status information of single photon, quantum-mechanical linear characteristic forbids the perfect clone of unknown quantum state, so, the status information that listener-in attempts to carry out copying or cloning under the prerequisite of not interfere information single photon impossible be accomplished.But along with quantum key communication continuous progress, attack option also gets more and more, the eye of assailant no longer concentrates on the shunting of photon signal or copies, but attempts directtissima and control the detecting devices of the single photon of carry information, i.e. single-photon detector.This attack option is exactly " high light blinding " single-photon detector, its principle is, first, very strong direct current light signal is added to attack single-photon detector in quantum communications channel, single-photon detector is made not to be operated in avalanche condition, thus cannot single photon signal be responded, the output of single-photon detector circuit is then controlled by the intense light pulse signal be superimposed upon on direct current high light signal.The result of high light blinding is exactly the output that assailant can control single-photon detector completely.Such assailant just can serve as Alice and " send out data " to Bob randomly.And Alice and Bob can not find which kind of the data received have abnormal, undertaken shaking hands by classical channel and to operations such as bases, the communication data that assailant only need steal classical channel more just can obtain nearly all quantum key signal in the same old way.
Utility model content
Technical problem to be solved in the utility model is, for the deficiencies in the prior art, provides a kind of single-photon detector high light blinding monitoring device.When assailant utilizes intensity light attack single-photon detector, the utility model can monitor signal to attack immediately, and notifies that system stops the collection of data immediately.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: single-photon detector high light blinding monitoring device, comprises temperature control circuit module, PIN photodiode, bias voltage setting module and shaping pulse and alerting signal generation module; Described bias voltage setting module is electrically connected with PIN photodiode, and PIN photodiode is electrically connected with shaping pulse and alerting signal generation module; Described temperature control circuit module is used for heating or refrigeration PIN photodiode, and the high light narrow pulse signal that described PIN photodiode is used for assailant sends converts short duration current to, and exports and the directly proportional burst pulse voltage of short duration current; Described shaping pulse and circuit become for burst pulse voltage transitions PIN photodiode exported can by the fiduciary level of follow-up main control chip identification; Bias voltage setting module is for arranging the reverse bias voltage be added in PIN photodiode.
Further, described temperature control circuit module uses TEC to heat or freeze PIN photodiode.
Further, described temperature control circuit module comprises thermistor, TEC and balanced bridge; Described thermistor is attached in PIN photodiode, for gathering the real time temperature of PIN photodiode; Described balanced bridge is for gathering the temperature variation of PIN photodiode and being converted into corresponding voltage change signal, and described voltage change signal freezes for control TEC or heats PIN photodiode, forms a loop cooling control structure.And monitoring less than.
Further, described shaping pulse and alerting signal module comprise level transferring chip, d type flip flop RC shaping pulse module, resistance R1, resistance R2, resistance R3 and resistance R4; Resistance R1 is connected between level transferring chip and PIN photodiode, and resistance R3 is also connected between level transferring chip and PIN photodiode; Level transferring chip is electrically connected with d type flip flop RC shaping pulse module; Described resistance R1, resistance R2, resistance R3 and resistance R4 are all terminating resistors, for carrying out translation to the quiescent point of PIN photodiode difference output pin, PIN photodiode DC point is made to fall in the operating voltage interval of level transferring chip input end; Described d type flip flop RC shaping pulse module utilizes the burst pulse of RC time delay to input to carry out shaping by d type flip flop, can not be narrow because of pulse when making alerting signal the width enough wide so that main control chip monitoring exported.
The utility model introduces light shunt in the quantum channel of quantum key equipment, and single-photon detector is sent on a road, and single-photon detector high light blinding monitoring device is sent on another road.In quantum key communication facilities, add a high light blinding monitoring equipment, once there is intensity light attack signal in quantum channel, can monitor immediately, and send alerting signal to host computer.Single-photon detector high light blinding monitoring device adopts common PIN photodiode to build high light observation circuit, and this high light observation circuit to respond single photon light signal weak like this, therefore can not affect single photon detection during proper communication.But in system, occur that this high light observation circuit of intensity light attack signal can make an immediate response and produce pulse signal, upper function monitors the change of this single-photon detector high light blinding monitoring device output signal immediately, and stops the distribution of quantum key in time.Fig. 1 is the block scheme of high light blinding monitoring method of the present utility model, this single-photon detector high light blinding monitoring device introduces light shunt at the receiving end of quantum key communication system quantum signal is carried out branch, and a wherein channel is monitored for high light blinding.Fig. 2 is the block diagram of this single-photon detector high light blinding monitoring device, use common PIN photodiode as signal to attack sensitive detection parts, its sensitivity can be regulated by bias voltage setting circuit within the specific limits, to adapt to the intensity light attack signal of certain limit, its minimum response light intensity is about 0.3nw, can introduce attemperating unit to PIN photodiode refrigeration with the sensitivity improving PIN photodiode time necessary.
This single-photon detector high light blinding monitoring device adopts common PIN photodiode, and circuit is simple, cost is low, when there is intensity light attack signal in quantum channel, can monitor immediately and send alerting signal to host computer.This single-photon detector high light blinding monitoring method is introduced light shunt and is proposed first and add single-photon detector high light blinding monitoring device in quantum key communication system in quantum key communication system, be used for preventing outside intensity light attack single-photon detector, ensure that the absolute safety of quantum key communication system.
Accompanying drawing explanation
Fig. 1 is the block scheme of high light blinding monitoring method of the present utility model.
Fig. 2 is the block diagram of this single-photon detector high light blinding monitoring device.
Fig. 3 is shaping pulse and alerting signal module and the electrical block diagram with PIN photodiode thereof.
Fig. 4 is the electrical block diagram of bias voltage setting module.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Embodiment
embodiment 1
See Fig. 1 and Fig. 2, this single-photon detector high light blinding monitoring device, comprises temperature control circuit module, PIN photodiode, bias voltage setting module and shaping pulse and alerting signal generation module; Described bias voltage setting module is electrically connected with PIN photodiode, and PIN photodiode is electrically connected with shaping pulse and alerting signal generation module; Described temperature control circuit module is used for heating or refrigeration PIN photodiode, and the high light narrow pulse signal that described PIN photodiode is used for assailant sends converts short duration current to, and exports and the directly proportional burst pulse voltage of short duration current; Described shaping pulse and circuit become for burst pulse voltage transitions PIN photodiode exported can by the fiduciary level of follow-up main control chip identification; Bias voltage setting module is for arranging the reverse bias voltage be added in PIN photodiode.
Preferably, described temperature control circuit module uses TEC to heat or freeze PIN photodiode.Described temperature control circuit module comprises thermistor, TEC and balanced bridge; Described thermistor is attached in PIN photodiode, for gathering the real time temperature of PIN photodiode; Described balanced bridge is for gathering the temperature variation of PIN photodiode and being converted into corresponding voltage change signal, and described voltage change signal freezes for control TEC or heats PIN photodiode, forms a loop cooling control structure.And monitoring less than.
Described shaping pulse and alerting signal module comprise level transferring chip, d type flip flop RC shaping pulse module, resistance R1, resistance R2, resistance R3 and resistance R4; Resistance R1 is connected between level transferring chip and PIN photodiode, and resistance R3 is also connected between level transferring chip and PIN photodiode; Level transferring chip is electrically connected with d type flip flop RC shaping pulse module; Described resistance R1, resistance R2, resistance R3 and resistance R4 are all terminating resistors, for carrying out translation to the quiescent point of PIN photodiode difference output pin, PIN photodiode DC point is made to fall in the operating voltage interval of level transferring chip input end; Described d type flip flop RC shaping pulse module utilizes the burst pulse of RC time delay to input to carry out shaping by d type flip flop, can not be narrow because of pulse when making alerting signal the width enough wide so that main control chip monitoring exported.
See Fig. 3, off-gauge, that amplitude the is less pulse voltage that PIN exports by this single-photon detector high light blinding monitoring device converts to can by the fiduciary level of follow-up main control chip identification.Wherein R1, R2, R3, R4 are terminating resistors, and its effect carries out translation to the quiescent point of PIN photodiode difference output pin, and its DC point is fallen in the operating voltage interval of level transferring chip input end.D type flip flop utilizes the burst pulse of RC time delay to input to carry out shaping, make can not to monitor because pulse is narrow when alerting signal the width enough wide so that main control chip monitoring exported less than.
See Fig. 4, wherein U6 is booster type switch chip, and the electric current consumed due to PIN photodiode is very little, for receiving peace level.Therefore capacitance voltage multiplier circuit is selected here.VDD is the supply voltage of Switching Power Supply, and D1, D2, D3, C3, C4, C5 form di-cap times laminated structure.VPIN is the output voltage of Switching Power Supply, and this voltage is added in the reverse input end of PIN, as its bias voltage.Intensity monitor device can arrange separately the reverse bias voltage be added in PIN photodiode when dispatching from the factory for different PIN, makes the response sensitivity of each PIN photodiode reach consistent.When setting reverse bias voltage here, the resistance value size that only need change R2 or R3 is just passable.
Temperature control circuit module uses existing more common temperature control circuit, uses TEC to heat or freeze PIN photodiode.The one-piece construction controlling PIN photodiode temperature is: first thermistor is attached to real time temperature PIN photodiode gathering PIN photodiode, then gather the temperature variation of PIN photodiode by balanced bridge and be converted into corresponding voltage change signal, freezed by this voltage signal control TEC or heat PIN photodiode, an overall formation loop cooling control structure.
embodiment 2
See Fig. 1, this single-photon detector high light blinding monitoring method, comprises the following steps:
Light is shunted: introduce light shunt at the receiving end of quantum key communication system and carried out branching into two branch roads by quantum signal, single-photon detector sent into by one of them branch road, and single-photon detector high light blinding monitoring device sent into by another branch road; Described single-photon detector high light blinding monitoring device is identical with embodiment 1, no longer describes in detail.
High light detects: carry out the monitoring of high light blinding by single-photon detector high light blinding monitoring device;
Report to the police: if described single-photon detector high light blinding monitoring device detects intensity light attack signal, then send alerting signal to System Control Center.
Claims (4)
1. a single-photon detector high light blinding monitoring device, is characterized in that: comprise temperature control circuit module, PIN photodiode, bias voltage setting module and shaping pulse and alerting signal generation module; Described bias voltage setting module is electrically connected with PIN photodiode, and PIN photodiode is electrically connected with shaping pulse and alerting signal generation module; Described temperature control circuit module is used for heating or refrigeration PIN photodiode, and the high light narrow pulse signal that described PIN photodiode is used for assailant sends converts short duration current to, and exports and the directly proportional burst pulse voltage of short duration current; Described shaping pulse and circuit become for burst pulse voltage transitions PIN photodiode exported can by the fiduciary level of follow-up main control chip identification; Bias voltage setting module is for arranging the reverse bias voltage be added in PIN photodiode.
2. single-photon detector high light blinding monitoring device according to claim 1, is characterized in that: described temperature control circuit module uses TEC to heat or freeze PIN photodiode.
3. single-photon detector high light blinding monitoring device according to claim 2, is characterized in that: described temperature control circuit module comprises thermistor, TEC and balanced bridge; Described thermistor is attached in PIN photodiode, for gathering the real time temperature of PIN photodiode; Described balanced bridge is for gathering the temperature variation of PIN photodiode and being converted into corresponding voltage change signal, and described voltage change signal freezes for control TEC or heats PIN photodiode, forms a loop cooling control structure.
4. single-photon detector high light blinding monitoring device according to claim 3, is characterized in that: described shaping pulse and alerting signal module comprise level transferring chip, d type flip flop RC shaping pulse module, resistance R1, resistance R2, resistance R3 and resistance R4; Resistance R1 is connected between level transferring chip and PIN photodiode, and resistance R3 is also connected between level transferring chip and PIN photodiode; Level transferring chip is electrically connected with d type flip flop RC shaping pulse module;
Described resistance R1, resistance R2, resistance R3 and resistance R4 are all terminating resistors, for carrying out translation to the quiescent point of PIN photodiode difference output pin, PIN photodiode DC point is made to fall in the operating voltage interval of level transferring chip input end; Described d type flip flop RC shaping pulse module utilizes the burst pulse of RC time delay to input to carry out shaping by d type flip flop, can not be narrow because of pulse when making alerting signal the width enough wide so that main control chip monitoring exported.
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| CN201420410889.6U CN204128683U (en) | 2014-07-24 | 2014-07-24 | Single-photon detector high light blinding monitoring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215328A (en) * | 2014-09-24 | 2014-12-17 | 安徽问天量子科技股份有限公司 | Hard light induced blindness monitoring device and method of single-photon detector |
| CN106768317A (en) * | 2016-11-14 | 2017-05-31 | 中国电子科技集团公司第四十研究所 | The caliberating device and method of a kind of single-photon detector detection efficient |
| CN107689829A (en) * | 2016-08-04 | 2018-02-13 | 安徽问天量子科技股份有限公司 | The monitoring device and method of single-photon detector detection blinding attack |
| EP3503457A1 (en) * | 2017-12-22 | 2019-06-26 | ID Quantique S.A. | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| CN110100315A (en) * | 2016-10-19 | 2019-08-06 | 弗劳恩霍夫应用研究促进协会 | Charge avalanche photodetector system |
| CN110118599A (en) * | 2018-02-07 | 2019-08-13 | 科大国盾量子技术股份有限公司 | A kind of integrated singl e photon detection device |
-
2014
- 2014-07-24 CN CN201420410889.6U patent/CN204128683U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215328A (en) * | 2014-09-24 | 2014-12-17 | 安徽问天量子科技股份有限公司 | Hard light induced blindness monitoring device and method of single-photon detector |
| CN107689829A (en) * | 2016-08-04 | 2018-02-13 | 安徽问天量子科技股份有限公司 | The monitoring device and method of single-photon detector detection blinding attack |
| CN110100315A (en) * | 2016-10-19 | 2019-08-06 | 弗劳恩霍夫应用研究促进协会 | Charge avalanche photodetector system |
| CN110100315B (en) * | 2016-10-19 | 2022-12-23 | 弗劳恩霍夫应用研究促进协会 | Charge avalanche photodetector system |
| CN106768317A (en) * | 2016-11-14 | 2017-05-31 | 中国电子科技集团公司第四十研究所 | The caliberating device and method of a kind of single-photon detector detection efficient |
| EP3503457A1 (en) * | 2017-12-22 | 2019-06-26 | ID Quantique S.A. | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| WO2019121783A1 (en) * | 2017-12-22 | 2019-06-27 | Id Quantique Sa | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| US11418316B2 (en) | 2017-12-22 | 2022-08-16 | Id Quantique Sa | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| US20220360425A1 (en) * | 2017-12-22 | 2022-11-10 | Id Quantique Sa | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| US11700109B2 (en) * | 2017-12-22 | 2023-07-11 | Id Quantique Sa | Method and device for recognizing blinding attacks in a quantum encrypted channel |
| CN110118599A (en) * | 2018-02-07 | 2019-08-13 | 科大国盾量子技术股份有限公司 | A kind of integrated singl e photon detection device |
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Address after: 241003 No. 12, Zhanghe Road, hi tech Zone, Anhui, Wuhu Patentee after: ANHUI ASKY QUANTUM TECHNOLOGY Co.,Ltd. Address before: 241002 Anhui science and technology innovation public service center, Wuhu national hi tech Zone, Yijiang Patentee before: ANHUI ASKY QUANTUM TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20150128 |