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1. 发明公开

US20240187219A1 A SYSTEM AND METHOD FOR TRUSTLESS KEY PROVISIONING 审中-公开
公开(公告)号：US20240187219A1
公开(公告)日：2024-06-06
申请号：US18273447
申请日：2022-01-21
申请人： ARQIT LIMITED
发明人： Barry Childe , Jon Dapre , David Webb , James Brown , Michael Mari
IPC分类号： H04L9/08 , H04L9/16
CPC分类号： H04L9/085 , H04L9/0819 , H04L9/0852 , H04L9/0861 , H04L9/16
摘要： A method of encryption key provisioning that includes providing, by a quantum computing safe method, a shared secret data to a device and to a security service; using the provided shared secret data to provide a root key; and using the root key for a sequence of stages, wherein each stage includes an operation which converts a start key into a different generated key, and the same stages are carried out in parallel at the device and at the security service; wherein the root key is used as the start key for a first stage, and a generated key produced by each stage, except for the final stage, is used as a start key for a next stage of the sequence; and wherein the generated keys produced by the last stage of the sequence at the device and at the security service are symmetric keys.

2. 发明公开

US20230299948A1 QUANTUM STREAMING 审中-公开
公开(公告)号：US20230299948A1
公开(公告)日：2023-09-21
申请号：US18017060
申请日：2021-07-20
申请人： ARQIT LIMITED
发明人： David WILLIAMS , Barry CHILDE
IPC分类号： H04L9/08 , G06N10/80 , H04L9/14 , H04L9/40
CPC分类号： H04L9/0852 , G06N10/80 , H04L9/085 , H04L9/14 , H04L63/0457
摘要： Method(s), system(s), apparatus are provided for quantum safe quantum streaming between a first endpoint device and second endpoint device via a server of a quantum cloud platform. Splitting, at the first endpoint device, a data item into a plurality of data shards that allow reconstruction of the data item. Encrypting, at the first endpoint device, each of the data shards separately using a first cryptographic key shared between the first endpoint device and the second endpoint device. Establishing, between the first endpoint device and the server, a first plurality of secure channels with the server of the quantum cloud platform using a second cryptographic key, the second cryptographic key shared between the endpoint and the server. Transmitting, from the first endpoint device to the server, the plurality of encrypted shards towards the second endpoint device via the server over the plurality of secure channels. Receiving, at the server, the plurality of encrypted data shards of the data item transmitted from the first endpoint device over the first plurality of secure channels, each data shard encrypted using the first cryptographic key known only to the first endpoint device and the second endpoint device. Securely storing, by the server, the encrypted data shards of the data item in a secure storage of the quantum cloud platform. In response to the second endpoint logging onto the quantum cloud platform, establishing a second plurality of secure channels with the second endpoint using a third cryptographic key, the third cryptographic key shared between the second endpoint device and the server. Retrieving the encrypted data shards of the data item from secure storage. Transmitting the encrypted data shards over the second plurality of secure channels to the second endpoint device. Receiving, at the second endpoint, a plurality of encrypted data shards of the encrypted data item from the server over the second plurality. Decrypting the encrypted data shards using the first cryptographic key to reconstruct the data item transferred from the first endpoint device to the second endpoint device.

3. 发明公开

US20240204998A1 RANDOM NUMBER GENERATION IN QUANTUM KEY DISTRIBUTION 审中-公开
公开(公告)号：US20240204998A1
公开(公告)日：2024-06-20
申请号：US18286692
申请日：2022-05-11
申请人： ARQIT LIMITED
发明人： Andrew Yeomans , Omar Iqbal , David Bestwick
IPC分类号： H04L9/08
CPC分类号： H04L9/0858 , H04L9/0819 , H04L9/0869
摘要： A method of operating a quantum key distribution (QKD) system including using a quantum random number generator (QRNG) to generate a random number string (RNS), and storing the RNS; providing the RNS to a first cryptographically secure pseudo-random number generator (CSPRNG) which uses random numbers of the RNS as seeds to generate respective first strings of pseudo-random numbers; using the first strings of pseudo-random numbers to encode photons or pulses transmitted by a transmitter of the QKD system; after a predetermined delay, providing the stored RNS to a second CSPRNG which uses random numbers of the RNS as seeds to generate respective second strings of pseudo-random numbers, the second CSPRNG identically configured to the first CSPRNG; using the second strings of pseudo-random numbers, together with information regarding encoded photons or pulses received by a receiver of the QKD system, to agree secure keys between the transmitter and the receiver.

4. 发明公开

US20240072996A1 SYSTEM AND METHOD FOR KEY ESTABLISHMENT 审中-公开
公开(公告)号：US20240072996A1
公开(公告)日：2024-02-29
申请号：US18272091
申请日：2022-01-13
申请人： ARQIT LIMITED
发明人： David WEBB , Daryl BURNS , David Williams
IPC分类号： H04L9/08
CPC分类号： H04L9/0819 , H04L9/0838
摘要： A computer-implemented method of establishing a key between a first and a second device in a network including a first and a second key node, the first and second key nodes with access to a same set of keys, the method including receiving, at the first device, data representative of first key establishment data from the first key node and the second device for calculating a Bilocation Key from a selected key from the set of keys; and receiving, at the second device, data representative of second key establishment data from the first device for requesting the Bilocation Key from the second key node, wherein the Bilocation Key is calculated based on the selected key from the set of keys; and wherein the first and second devices use corresponding Bilocation Keys to each generate a Final Key based on an agreed portion of the first and second key establishment data.

5. 发明申请

US20220407688A1 QUANTUM KEY DISTRIBUTION PROTOCOL 有权
公开(公告)号：US20220407688A1
公开(公告)日：2022-12-22
申请号：US17775210
申请日：2020-11-06
申请人： Arqit Limited
发明人： Barry Childe , David Bestwick , David Williams , Andrew James Victor Yeomans , Omar Iqbal
IPC分类号： H04L9/08
摘要： Methods, apparatus, and systems are provided for performing a quantum key distribution (QKD) protocol 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.

6. 发明公开

US20240106637A1 QKD SWITCHING SYSTEM AND PROTOCOLS 审中-公开
公开(公告)号：US20240106637A1
公开(公告)日：2024-03-28
申请号：US18274632
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： Andrew Yeomans , Daryl Burn , David Willams
IPC分类号： H04L9/08 , H04L45/42
CPC分类号： H04L9/0855 , H04L45/42
摘要： A quantum key distributed (QKD) apparatus for linking endpoint devices in a network, which includes: QKD links each including a quantum channel and a classical channel, wherein each endpoint has a QKD link; quantum transmitters to transmit quantum transmissions over a quantum channel of one of the QKD links; classical transceivers to transmit classical data over a classical channel of one of the QKD links and to receive classical data over the classical channel of said QKD link; and a controller connected to the quantum transmitters and the classical transceivers to route data generated for quantum transmission to an endpoint over a quantum channel of the QKD link of the endpoint; route classical data for classical transmission to an endpoint via a classical transceiver over a classical channel of the QKD link of the endpoint; and route classical data over the classical channel of the QKD link of an endpoint.

7. 发明公开

US20240097893A1 QKD SWITCHING SYSTEM 审中-公开
公开(公告)号：US20240097893A1
公开(公告)日：2024-03-21
申请号：US18274429
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： Andrew Yeomans , Daryl Burns , David Williams
IPC分类号： H04L9/08 , H04B10/70
CPC分类号： H04L9/0855 , H04B10/70
摘要： A quantum key distributed (QKD) apparatus for use with at least two endpoint devices, the apparatus including QKD links each having a communication medium with a quantum channel and a classical channel, wherein each endpoint has a QKD link connected to the QKD apparatus; transmitters to transmit quantum transmissions over a quantum channel of one of the QKD links; a classical transceiver component to transmit/receive classical data over a classical channel of one of the QKD links; and a controller to route data for quantum transmission to an endpoint via a transmitter assigned to the endpoint over a quantum channel of the QKD link of the endpoint, route classical data to an endpoint via a classical transceiver assigned to the endpoint over a classical channel of the QKD link of the endpoint, and route classical data over the classical channel of the QKD link of an endpoint.

8. 发明公开

US20230360040A1 QUANTUM-SAFE PAYMENT SYSTEM 审中-公开
公开(公告)号：US20230360040A1
公开(公告)日：2023-11-09
申请号：US18017259
申请日：2021-07-20
申请人： ARQIT LIMITED
发明人： Barry CHILDE , Jon DAPRE , David WILLIAMS
IPC分类号： G06Q20/38 , G06Q20/40 , G06Q20/02 , G06Q20/06
CPC分类号： G06Q20/3829 , G06Q20/4014 , G06Q20/027 , G06Q20/0655
摘要： A computer-implemented method of secure quantum safe (QS) payments using a quantum cloud payment platform, the method, performed by the quantum cloud payment platform, comprising: receiving one or more quantum safe deposit payment transactions from one or more endpoint devices of one or more registered users, each QS deposit payment transaction of a user comprising data representative of a deposit fiat cash value; transferring each of the deposit fiat cash values from a bank account associated with a user and linked to the QS payment account of the user to a quantum cloud account for pooling each of the deposit fiat cash values; for each deposit fiat cash value transferred in relation to a user of an endpoint device, performing: converting said each deposit fiat cash value to a corresponding number of quantum money tokens; linking said number of quantum money tokens to the QS payment account of the user; and sending said number of quantum money tokens to the endpoint device of the user for updating an electronic wallet of said user.

9. 发明申请

US20220393866A1 A METHOD OF MANAGEMENT OF REMOTE OPERATIONS 有权
公开(公告)号：US20220393866A1
公开(公告)日：2022-12-08
申请号：US17775214
申请日：2020-11-06
申请人： ARQIT LIMITED
发明人： David Williams , Barry Childe , David Bestwick , Andrew James Victor Yeomans
IPC分类号： H04L9/08 , H04B10/70 , H04B7/185
摘要： A method of scheduling encryption key delivery communication sessions in a satellite quantum key distribution system comprising a constellation of one or more satellites and a plurality of user ground stations comprises producing a list of user ground stations requiring encryption keys. For each satellite of the constellation of satellites, determining a region of the earths surface within which the satellite can carry out encryption key delivery communication sessions to user ground stations using a quantum optical communications link during a scheduling period. Obtaining a cloud cover map. Comparing the locations of the listed user ground stations, the determined regions of the earths surface for the constellation of satellites, and the cloud cover map, to identify listed user ground stations to which encryption key delivery can be carried out by the constellation of satellites during the scheduling period. Determining which of the identified user ground stations each satellite of the constellation of satellites will carry out encryption key delivery communication sessions with at different times in the scheduling period based upon one or more of: an amount of unused encryption keys at each identified user ground station; and an expected time duration before each identified user ground station runs out of encryption keys.

10. 发明公开

US20240313949A1 KEY EXCHANGE PROTOCOL FOR QUANTUM NETWORK 审中-公开
公开(公告)号：US20240313949A1
公开(公告)日：2024-09-19
申请号：US18274655
申请日：2022-01-28
申请人： ARQIT LIMITED
发明人： Andrew Yeomans , Michael Murphy , Oliver Cohen , Omar Iqbal , James Brown
IPC分类号： H04L9/08
CPC分类号： H04L9/0819 , H04L9/0855
摘要： A method for performing a key exchange between a first device, a second device, and an intermediary device, wherein the intermediary device: transmits to the first device a first secret symbol string over a first quantum channel and a first basis set over a first channel, transmits to the second device a second secret symbol string over a second quantum channel and a second basis set over a second channel, and generates a third symbol string by combining the first and second secret symbol strings and transmits data representative of the third symbol string to the second device, whereby the first and second devices perform a quantum key exchange and sifting based on the first and second secret symbol strings and first and second basis sets, and a fourth set of symbols is generated by the second device by combining the second secret symbols with the third symbol string.

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