公开(公告)号：US10523430B2

公开(公告)日：2019-12-31

申请号：US16392915

申请日：2019-04-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Geng ,  Chen-Xiong Zhang

IPC: H04L9/08 ,  H04B10/70

Abstract: An information processing method, includes calculating, using a first station, an estimated ratio of a quantity of pulses affected by a photon-number splitting (PNS) attack including a multi-photon in the pulses to a total quantity of the pulses, performing, using the first station, error correction processing on key information based on the estimated ratio to obtain a shared key of the first station and a second station when the estimated ratio is less than a preset threshold. Hence, a degree to which the photon is affected by the PNS attack can be estimated in order to perform error correction on the key information, thereby improving security of a key distribution.

公开(公告)号：US20250076036A1

公开(公告)日：2025-03-06

申请号：US18948756

申请日：2024-11-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hai Chen ,  Xiaowei Wang ,  Wei Geng

IPC: G01B11/25

Abstract: A three-dimensional (3D) information measurement apparatus includes: a light source module, an event awareness module, and a processing module. The light source module is configured to project at least two speckle images onto a target object, and measurement depths corresponding to any two of the at least two speckle images are different. The event awareness module is configured to collect speckle images obtained through reflection of the at least two speckle images by the target object, to obtain a plurality of event images. The processing module is configured to determine 3D information of the target object based on the plurality of event images.

公开(公告)号：US20190253246A1

公开(公告)日：2019-08-15

申请号：US16392915

申请日：2019-04-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Geng ,  Chen-Xiong Zhang

IPC: H04L9/08 ,  H04B10/70

Abstract: An information processing method, includes calculating, using a first station, an estimated ratio of a quantity of pulses affected by a photon-number splitting (PNS) attack including a multi-photon in the pulses to a total quantity of the pulses, performing, using the first station, error correction processing on key information based on the estimated ratio to obtain a shared key of the first station and a second station when the estimated ratio is less than a preset threshold. Hence, a degree to which the photon is affected by the PNS attack can be estimated in order to perform error correction on the key information, thereby improving security of a key distribution.