公开(公告)号：US20170099139A1

公开(公告)日：2017-04-06

申请号：US15176428

申请日：2016-06-08

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Wook HAN ,  Sung Wook MOON ,  Yong-Su KIM ,  Il Young KIM ,  Byungkwon PARK

IPC: H04L9/08

CPC classification number: H04L9/0852 ,  B82Y20/00 ,  H04B10/70 ,  H04L9/0858

Abstract: Disclosed is a method for stabilizing a quantum cryptography system, which includes: determining whether the quantum cryptography system operates in a stabilized state, on the basis of a bit error rate or a key rate of the quantum cryptography system; and readjusting an arrival time of a gate pulse or a laser operation time so that an arrival time of a single photon for a photon detector is aligned with the arrival time of the gate pulse, when the quantum cryptography system does not operate in a stabilized state. Here, the quantum cryptography system may be a two-way quantum cryptography system.

公开(公告)号：US20160359624A1

公开(公告)日：2016-12-08

申请号：US14590585

申请日：2015-01-06

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Su KIM ,  Sang Wook HAN ,  Sung Wook MOON ,  Yujun CHOI

IPC: H04L9/08 ,  H04B10/70

CPC classification number: H04L9/0855 ,  H04B10/70 ,  H04L2209/34

Abstract: An apparatus for quantum cryptographic communication includes a light source configured to generate an optical pulse which is transmitted to a plurality of quantum code sending devices, and a quantum entanglement measuring unit configured to receive the optical signal generated from each of the plurality of quantum code sending devices and measure a relation among quantum states of the optical signals received from the plurality of quantum code sending devices; the optical signal being generated by encoding a key to a quantum state of the optical pulse. The apparatus for quantum cryptographic communication may further include a signal direction determining unit, a reflector for reflecting the optical pulse or the optical signal, an arbitrary phase shifter, or a modulator for encoding a digital signal corresponding to the key to the optical pulse.

Abstract translation: 一种用于量子密码通信的装置包括：光源，被配置为产生被发送到多个量子码发送装置的光脉冲;量子纠缠测量单元，被配置为接收从所述多个量子码发送中的每一个产生的光信号 测量从多个量子码发送装置接收的光信号的量子态之间的关系; 光信号是通过将键编码为光脉冲的量子态产生的。 用于量子密码通信的装置还可以包括信号方向确定单元，用于反射光脉冲或光信号的反射器，任意移相器或用于对与光脉冲对应的键的数字信号进行编码的调制器。