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公开(公告)号：US12052352B2
公开(公告)日：2024-07-30
申请号：US17613048
申请日：2020-05-06
申请人： ID QUANTIQUE SA
发明人： Kelly Richdale , Bruno Huttner
IPC分类号： H04L9/08
CPC分类号： H04L9/0858 , H04L9/0827
摘要： A quantum key distribution (QKD) system comprising: an emitter (110) adapted to generate a QKD free-space signal, a transmitter station (220) adapted to receive the free-space signal from the emitter (110), and a remote QKD receiving station (250) supporting a QKD receiver (160) located at a different location than the transmitter station, wherein the transmitter station is adapted to receive said free space signal from the emitter and to forward said signal through a fiber link (400) to the QKD receiver (160) in said remote QKD receiving station (250).
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公开(公告)号：US11988551B2
公开(公告)日：2024-05-21
申请号：US17615020
申请日：2020-06-16
CPC分类号： G01J1/4228 , H10N60/30 , H10N60/84 , G01J2001/442
摘要： A device for single-photon detection comprising two superconducting detectors, a bias-current source, a filter element and a readout circuit. Each detector forms a detection area for absorption of incident photons and is connected in parallel; each detector being maintained below its critical temperature and provided with an electrical bias current situated close to and below its critical current so as to be maintained in a non-resistive superconducting state, and configured to transition, at photon absorption, from the non-resistive state to a resistive state due to an increase in current density within the detector above the critical current. The readout circuit senses a voltage change corresponding to the, allowing creation of an event signal for each absorption of an incident photon by a detector. The device includes a current-redistribution portion for redistributing current arising after absorption of incident photons so as to avoid increases in current density above the critical current.
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公开(公告)号：US20190212985A1
公开(公告)日：2019-07-11
申请号：US16099152
申请日：2017-05-05
发明人： Emna Amri , Yacine Felk , Damien Stucki , Jiaju Ma , Eric R. Fossum
摘要： Some embodiments provide methods and apparatus for quantum random number generation based on a single bit or multi bit Quanta Image Sensor (QIS) providing single-photon counting over a time interval for each of an array of pixels of the QIS, wherein random number data is generated based on the number of photons counted over the time interval for each of the pixels.
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公开(公告)号：US20220360425A1
公开(公告)日：2022-11-10
申请号：US17751811
申请日：2022-05-24
申请人： ID Quantique SA
发明人： Félix BUSSIÈRES , Gaëtan GRAS
摘要： The present invention relates to a receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) comprising an optical fiber, comprising a multipixel detector (2210) comprising a plurality of pixels, and configured to be illuminated by a light beam outputted by the optical fiber, and a processing unit (2220) connected to the multipixel detector (2210) and configured to determine the presence of a blinding attack if a predetermined number of pixels detects light within a predetermined interval. The invention further relates to the use of the receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) and to a method for recognizing blinding attacks in a quantum encrypted channel (1300).
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公开(公告)号：US11411723B2
公开(公告)日：2022-08-09
申请号：US16469338
申请日：2017-12-05
申请人： ID QUANTIQUE SA
发明人： Matthieu Legré , Bruno Huttner
摘要： Free-Space key distribution method comprising exchanging information between an emitter (100) and a receiver (200) based on the physical layer wiretap channel model, comprising the steps of randomly preparing (710), at the emitter (100), one qubit encoded with one of two possible non-identical quantum states, sending (720) the encoded qubit to the receiver (200) through a physical layer quantum-enhanced wiretap channel (500), such that an eavesdropper (300) tapping said channel is provided with partial information about the said states only, detecting and measuring (730) the received quantum states, key sifting (740) between the emitter and the receiver through a classical channel, calculating (750, 760) an amount of information available to any eavesdropper (300) based on the detected and received quantum states.
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公开(公告)号：US20220224523A1
公开(公告)日：2022-07-14
申请号：US17613048
申请日：2020-05-06
申请人： ID QUANTIQUE SA
发明人： Kelly RICHDALE , Bruno HUTTNER
IPC分类号： H04L9/08
摘要： A quantum key distribution (QKD) system comprising: an emitter (110) adapted to generate a QKD free-space signal, a transmitter station (220) adapted to receive the free-space signal from the emitter (110), and a remote QKD receiving station (250) supporting a QKD receiver (160) located at a different location than the transmitter station, wherein the transmitter station is adapted to receive said free space signal from the emitter and to forward said signal through a fiber link (400) to the QKD receiver (160) in said remote QKD receiving station (250).
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公开(公告)号：US11293834B2
公开(公告)日：2022-04-05
申请号：US16474347
申请日：2017-12-21
申请人： ID QUANTIQUE SA
发明人： Felix Bussieres , Bruno Sanguinetti
IPC分类号： G01M11/00
摘要： The present invention relates to a measuring device (3000) for measuring reflection in an optical fiber (1400), the device comprising: emitting means (3100) connected to the optical fiber (1400) and configured to emit light into the optical fiber (1400), measuring means (3300) connected to the optical fiber (1400) and configured to receive a reflected light from the optical fiber (1400), wherein the measuring means comprises a first photon detector (3310) and a second photon detector (3311), wherein the operation of the second photon detector (3311) and/or the reflected light reaching the second photon detector (3311) is controlled based on an output of the first photon detector (3310).
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公开(公告)号：US20210173733A1
公开(公告)日：2021-06-10
申请号：US17110545
申请日：2020-12-03
申请人： ID QUANTIQUE SA
发明人： Nino WALENTA
摘要： The invention relates to a IM bias voltage determining method adapted to determine an IM bias voltage corresponding to a desired Quantum Bit Error Rate based on the following formula Q ( V IM ) = Q 0 + R err R err + R cor where Q(VIM) is the QBER dependent of the IM bias voltage VIM, Q0 is the optimal minimal QBER, Rerr is the number of erroneous detections, Rcor is the number of correct detections and VIM is the IM bias voltage.
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公开(公告)号：US10145513B2
公开(公告)日：2018-12-04
申请号：US15189426
申请日：2016-06-22
申请人： ID QUANTIQUE SA
发明人： Sylvain Chuard , Félix Bussieres , Boris Korzh
摘要： Cryogenic device comprising at least two chambers at two different temperatures, a first chamber at a first temperature T1 accommodating a sample, and a second chamber at a second temperature T2 greater than T1 and being adapted to accommodate a cooling device, said cooling device being adapted to cool wirelines connecting said sample to an external element detector, wherein said cooling device is an IMS thermalization plate comprising at least one wire-guide having an input for plugging a wire line connected to the sample and an output for plugging a wire line connected to said external element, said wire-guide being thermally connected to the first chamber.
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公开(公告)号：US10020937B2
公开(公告)日：2018-07-10
申请号：US15452902
申请日：2017-03-08
申请人： ID QUANTIQUE SA
发明人： Matthieu Legre , Grégorie Ribordy
CPC分类号： H04L9/0852 , H04L9/002
摘要： An apparatus and method for revealing both attack attempts performed on the single-photon detector(s) of a quantum cryptography system and Trojan horse attack attempts performed on quantum cryptography apparatus containing at least one single photon detector. The attacks detection relies on both the random modification of the setting parameters of the said single-photon detector(s) and the comparison of the measured detection probability values for each setting parameter with the expected detection probability values. The modified parameter of the single-photon detector can be its efficiency or its timing of activation for example.
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