公开(公告)号：US20200213105A1

公开(公告)日：2020-07-02

申请号：US16817125

申请日：2020-03-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengyu LI ,  Changzheng SU

IPC: H04L9/08 ,  H04B10/70 ,  H04B10/516

Abstract: This application discloses a continuous-variable quantum key distribution (CV-QKD) device and method. The device includes a light source, a modulation unit, a first random number generator, and a processor, where the processor is configured to obtain a first data sequence based on a preset quantity of modulation format symbols, a distribution probability of each symbol, and a first random number sequence generated by the first random number generator, and obtain a second data sequence based on the first data sequence; and the modulation unit is configured to modulate, based on to the first data sequence, a signal emitted by the light source to output a second optical signal, where the second optical signal does not need to include quantum states with a quantity in an order of magnitude of 28×28 required in an existing Gaussian protocol.

公开(公告)号：US20230188334A1

公开(公告)日：2023-06-15

申请号：US18166336

申请日：2023-02-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengyu LI ,  Changzheng SU ,  Su HU ,  Yang ZOU

IPC: H04L9/08 ,  G06N10/00 ,  H04L9/06

CPC classification number: H04L9/0852 ,  G06N10/00 ,  H04L9/0618 ,  H04L9/0819 ,  H04L9/0822 ,  H04L9/083 ,  H04L9/0855

Abstract: This application discloses quantum key distribution methods and devices, and storage media. In an implementation, an ith node generates, based on a determined first quantum key corresponding to the ith node on a target routing path and a determined second quantum key corresponding to the ith node on the target routing path, a third quantum key corresponding to the ith node on the target routing path, and sends the third quantum key corresponding to the ith node on the target routing path to a destination node on the target routing path, or encrypts a received first ciphertext by using the third quantum key corresponding to the ith node on the target routing path, and sends an obtained second ciphertext corresponding to the ith node to an (i+1)th node on the target routing path.

公开(公告)号：US20210044432A1

公开(公告)日：2021-02-11

申请号：US17069317

申请日：2020-10-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengyu LI ,  Changzheng SU ,  Su HU ,  Yang ZOU

IPC: H04L9/08 ,  H04L9/06 ,  G06N10/00

Abstract: This application provide quantum key distribution methods, devices, and storage media. In an implementation, a method comprises: determining, based on a first mapping, a first quantum key of N first quantum keys corresponding to an ith node on a target routing path; determining, based on a second mapping, a second quantum key of N second quantum keys corresponding to the ith node; and generating, by the ith node based on the first quantum key corresponding to the ith node and the second quantum key corresponding to the ith node, a third quantum key corresponding to the ith node on the target routing path.