公开(公告)号：US10958428B2

公开(公告)日：2021-03-23

申请号：US15350376

申请日：2016-11-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chang-Ho Hong ,  Na-Young Kim ,  O-Sung Kwon ,  Youn-Chang Jeong ,  Haeng-Seok Ko ,  Jin-Gak Jang ,  Dae-Sung Kwon

IPC: H04L9/08 ,  H04L9/00

Abstract: A device and method for quantum key distribution (QKD). The QKD center includes an authentication key sharing unit for sharing authentication keys with QKD client devices; a quantum key generation unit for generating a sifted key for each of the QKD client devices using a quantum state; an error correction unit for generating output bit strings by correcting errors of the sifted keys; and a bit string operation unit for calculating an encryption bit string by performing a cryptographic operation on the authentication keys, the distribution output bit strings and output bit strings received from the QKD client devices. The present invention improves security by preventing the QKD center from being aware of keys shared among users.