专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2022162390A1 KEY EXCHANGE PROTOCOL FOR QUANTUM NETWORK 审中-公开
公开(公告)号：WO2022162390A1
公开(公告)日：2022-08-04
申请号：PCT/GB2022/050243
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： YEOMANS, Andrew , MURPHY, Michael , COHEN, Oliver , IQBAL, Omar , BROWN, James
IPC分类号： H04L9/08
摘要： Methods, apparatus, and systems are provided for performing a key exchange between a first device, a second device, and an intermediary device. The intermediary device transmitting: a first secret symbol string over a first quantum channel to the first device; a first basis set over a first communication channel to the first device. The intermediary device; a second secret symbol string over a second quantum channel to the second device; a second basis set over a second communication channel to the second device. The intermediary device generating a third symbol string based on combining the first and second secret symbol strings and transmitting to the second device, via the second communication channel, data representative of the third symbol string. The first device and second device perform a quantum key exchange and sifting based on the corresponding received first and second secret symbol strings and first and second basis sets, and a fourth set of symbols generated by the second device generates a fourth set of symbols based on combining the second received secret symbols with the received third symbol string.

2. 发明申请

WO2023067297A1 WAVELENGTH MULTIPLEXING FOR AN OPTICAL COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2023067297A1
公开(公告)日：2023-04-27
申请号：PCT/GB2022/052455
申请日：2022-09-28
申请人： ARQIT LIMITED
发明人： KOEHLER-SIDKI, Alexander , PARKER, Ryan , IQBAL, Omar
IPC分类号： H04B10/70 , H04J14/02 , H04L9/08
摘要： An optical communication system, a receiver, a transmitter, and a method of operating thereof are provided. The method includes: at a transmitter 2: emitting 50 N single-wavelength quantum beams from N faint photon sources 8; multiplexing 52 the N single-wavelength quantum beams using a first wavelength division multiplexer (WDM) 22 to produce a combined multi-wavelength quantum beam, wherein the combined multi-wavelength quantum beam comprises a series of interleaved single-photon events having different wavelengths, and has a repetition rate N times that of individual single-wavelength quantum beams; transmitting 54 the combined multi-wavelength quantum beam to a receiver; and at the receiver 3: de-multiplexing 56 the combined multi-wavelength quantum beam according to the wavelength using a second WDM 26 to recover the N single-wavelength quantum beams; at N single photon detection units, receiving a respective quantum beam of the N quantum beams and detecting single photon events resulting from the respective quantum beam, such that each single photon detection unit corresponds to a respective quantum beam and as such the respective wavelength of that quantum beam; tagging 64 each single photon detection event resulting from each single-wavelength quantum beam according to time, and at least one of: a wavelength of photons associated with the detection event, and an identity of the detecting single photon detection unit responsible for the detection event, thereby introducing a correlation between the time at which the detection event is registered, and at least one of: the wavelength of the photons associated with the detection event, and the identity of the detecting single photon detection unit responsible forthe detection event; and assigning a detection time-period to the detection event based on the correlation.

3. 发明申请

WO2022200757A1 A SYSTEM AND METHOD FOR TIME SYNCHRONISATION 审中-公开
公开(公告)号：WO2022200757A1
公开(公告)日：2022-09-29
申请号：PCT/GB2022/050459
申请日：2022-02-21
申请人： ARQIT LIMITED
发明人： IQBAL, Omar , HASELWOOD, Sam , LEE, Cassie
IPC分类号： H04L9/08 , H04B10/70
摘要： A method and system for time synchronisation in a satellite based quantum key distribution (QKD) system, by: at a transmitter, emitting a first series of laser pulses, the first series of laser pulses being encoded to form a quantum beam; at the transmitter, emitting a second series of laser pulses, the second series of laser pulses having a predetermined repeating pattern; and at the transmitter, sending the first and second series of laser pulses to a receiver. At a receiver, receiving the first series of laser pulses and the second series of laser pulses at the receiver and determining reception times of pulses of the first series of laser pulses and pulses of the second series of laser pulses. Comparing the received second series of laser pulses to the predetermined pattern at different points in the predetermined pattern, and determining the point at which the received second series of laser pulses is most strongly correlated to the predetermined pattern; with the received second series of laser pulses aligned to the predetermined pattern at the determined point, determining a relationship fitting respective reception times of a plurality of the received pulses to respective emission times of corresponding ones of the second series of laser pulses; and using the determined relationship to convert between reception times of the first series of laser pulses and emission times of corresponding ones of the first series of laser pulses.

4. 发明申请

WO2022162392A1 KEY EXCHANGE PROTOCOL FOR SATELLITE BASED QUANTUM NETWORK 审中-公开
公开(公告)号：WO2022162392A1
公开(公告)日：2022-08-04
申请号：PCT/GB2022/050245
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： YEOMANS, Andrew , IQBAL, Omar , CHILDE, Barry
IPC分类号： H04L9/08
摘要： Methods, apparatus, and systems are provided for performing a key exchange using a quantum key distribution (QKD) protocol between a first device, a second device, and an intermediary device. The intermediary device receives: a first set of symbols over a first quantum channel transmitted from the first device; and sends a first receiving basis information to the first device, where the first device withholds from the intermediary device the first transmitting basis information for transmitting said first set of symbols over the first quantum channel. The intermediary device transmits: a second set of symbols over a second quantum channel transmitted to the second device; and transmits a second transmitting basis information to the second device, where the second device withholds from the intermediary device the second receiving basis information for receiving said second set of symbols over the first quantum channel. The intermediary device generates first and second intermediate sets of symbols based on the validly received first set of symbols and transmitted second set of symbols received/transmitted over the quantum channels. The intermediary device generates a third intermediate set of symbols based on combining the first and second intermediate sets of symbols and sends the third intermediate set of symbols to the second device and/or first device. The first device and second device perform a key exchange by exchanging with themselves the first transmitting and second receiving basis information and/or first receiving and second transmitting basis information to determine a final shared key based on the first set of symbols, the second set of symbols and the third intermediate set of symbols.

5. 发明公开

EP4285543A1 KEY EXCHANGE PROTOCOL FOR SATELLITE BASED QUANTUM NETWORK 审中-实审
公开(公告)号：EP4285543A1
公开(公告)日：2023-12-06
申请号：EP22703961.7
申请日：2022-01-28
申请人： Arqit Limited
发明人： IQBAL, Omar , CHILDE, Barry , YEOMANS, Andrew
IPC分类号： H04L9/08

6. 发明公开

EP4285544A1 KEY EXCHANGE PROTOCOL FOR SATELLITE BASED QUANTUM NETWORK 审中-实审
公开(公告)号：EP4285544A1
公开(公告)日：2023-12-06
申请号：EP22704410.4
申请日：2022-01-28
申请人： Arqit Limited
发明人： IQBAL, Omar , CHILDE, Barry
IPC分类号： H04L9/08

7. 发明公开

EP4055771A1 A SYSTEM AND METHOD FOR SATELLITE QUANTUM KEY DISTRIBUTION 审中-实审
公开(公告)号：EP4055771A1
公开(公告)日：2022-09-14
申请号：EP20804656.5
申请日：2020-11-06
申请人： Arqit Limited
发明人： WILLIAMS, David , BESTWICK, David , CHILDE, Barry , YEOMANS, Andrew James Victor , IQBAL, Omar
IPC分类号： H04L9/08 , H04B10/70

8. 发明申请

WO2023067298A1 OPTICAL SWITCHING FOR QUANTUM KEY DISTRIBUTION 审中-公开
公开(公告)号：WO2023067298A1
公开(公告)日：2023-04-27
申请号：PCT/GB2022/052456
申请日：2022-09-28
申请人： ARQIT LIMITED
发明人： KOEHLER-SIDKI, Alexander , PARKER, Ryan , IQBAL, Omar
IPC分类号： H04B10/70 , H04L9/08
摘要： A receiver (3), method, and system (1) for optical signal communication and software for operating a quantum key distribution (QKD) system are provided. The receiver (3) is configured to receive an optical signal from a transmitter (2) in an optical communication system, the receiver (3) comprising: at least a first (36a) and a second (36b) signal detection unit for detecting detection events associated with single photons; at least one optical switch (12) configured to alternate between engaging at least a first switch position and a second switch position, the first switch position being arranged to direct a received optical signal to the first signal detection unit (36a) and the second switch position being arranged to direct a received optical signal to the second signal detection unit (36b), such that the first (36a) and second (36b) signal detection units correspond to the first and second switch positions respectively; a detection time tagger (40) configured to tag the detection events at the first (36a) and second (36b) signal detection units according to time, switch position, and signal detection unit, thereby introducing a correlation between a time period in which a detection event is registered, the switch position, and the signal detection unit; and a timing recovery module (42) connected to the detection time tagger (40), wherein the timing recovery module (42) is configured to: use the correlation to verify whether or not a detection event has been tagged in the correct time period, and, if a detection event is found to be tagged in the incorrect time period, re-assign the detection event to the correct time period.

9. 发明申请

WO2022200759A1 A SYSTEM AND METHOD FOR BEAM ALIGNMENT 审中-公开
公开(公告)号：WO2022200759A1
公开(公告)日：2022-09-29
申请号：PCT/GB2022/050467
申请日：2022-02-21
申请人： ARQIT LIMITED
发明人： IQBAL, Omar , HESELWOOD, Sam , LEE, Cassie
IPC分类号： H04L9/08 , H04B10/70
摘要： A method of aligning a quantum laser beam with a receiver, the method comprising: generating a quantum laser beam and a first classical, non-quantum, laser beam at a transmitter, the quantum laser beam and the first classical laser beam being substantially aligned in direction; transmitting the quantum laser beam and the first classical laser beam; and directing the quantum laser beam and first classical laser beam to a receiver; measuring the photon reception rate through the quantum laser beam at the receiver, and reporting the photon reception rate to the transmitter; at the transmitter, making a series of adjustments to the direction of the transmitted quantum laser beam and the first classical laser beam, and monitoring the reported photon reception rate; wherein, each of the series of adjustments is based, at least in part, on the effect of the preceding adjustment on the reported photon detection rate.

10. 发明申请

WO2022162391A1 KEY EXCHANGE PROTOCOL FOR SATELLITE BASED QUANTUM NETWORK 审中-公开
公开(公告)号：WO2022162391A1
公开(公告)日：2022-08-04
申请号：PCT/GB2022/050244
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： YEOMANS, Andrew , IQBAL, Omar , CHILDE, Barry
IPC分类号： H04L9/08
摘要： Methods, apparatus, and systems are provided for performing a key exchange using a quantum key distribution (QKD) protocol between a first device, a second device, and an intermediary device. The intermediary device receives: a first set of symbols over a first quantum channel transmitted from the first device; and sends a first receiving basis information to the first device. The intermediary device receives: a second set of symbols over a second quantum channel transmitted from the second device; and sends a second receiving basis information to the second device. The intermediary device generates first and second intermediate sets of symbols based on the validly received first and second sets of symbols received over the quantum channels. The intermediary device generates a third intermediate set of symbols based on combining the first and second intermediate sets of symbols and sends the third intermediate set of symbols to the second device and/or first device. The first device and second device perform a key exchange by exchanging with themselves the first and second transmitting basis information and/or first and second receiving basis information to determine a final shared key based on the first set of symbols, the second set of symbols and the third intermediate set of symbols.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式