The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Jun. 20, 2023
Korea Institute of Science & Technology Information, Daejeon, KR;
Il Kwon Sohn, Daejeon, KR;
Kwang Il Bae, Daejeon, KR;
Eun Joo Lee, Daejeon, KR;
Won Hyuk Lee, Sejong-si, KR;
KOREA INSTITUTE OF SCIENCE & TECHNOLOGY INFORMATION, Daejeon, KR;
Abstract
The present disclosure according to at least one embodiment provides a quantum key distribution (QKD)-based quantum digital signature method using a trusted node, the QKD-based quantum digital signature method being performed by a trusted node. The method comprises sharing a first secret key with a message-sending node, sharing a second secret key with a message-receiving node, generating a first trusted-node signature by performing a partial QKD process together with the message-sending node, generating a second trusted-node signature by performing a partial QKD process together with the message-receiving node, and verifying a first message with the shared first and second secret keys and with the first and second trusted-node signatures.