Title:
CRYPTOGRAPHIC KEY SHARING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/120563
Kind Code:
A1
Abstract:
A sender system 2 comprises: a transmission optical unit 20 that transmits, via a line of sight communication path 4, an encoded light signal 40 at a pre-set intensity; and a key distillation unit 21 that generates a cryptographic key from a random number bit string of the transmission optical unit 20, by means of key distillation processing via an authenticated public communication path 5. A regular recipient system 3 comprises: a reception optical unit 30 that receives, via the line of sight communication path 4, the light signal 40 from the transmission optical unit 20; and a key distillation unit 31 that generates a cryptographic key from a random number bit string of the reception optical unit 30 by means of key distillation processing via the authenticated public communication path 5.
Inventors:
ENDO HIROYUKI (JP)
SASAKI MASAHIDE (JP)
FUJIWARA MIKIO (JP)
TAKEOKA MASAHIRO (JP)
KOASHI MASATO (JP)
SASAKI TOSHIHIKO (JP)
SASAKI MASAHIDE (JP)
FUJIWARA MIKIO (JP)
TAKEOKA MASAHIRO (JP)
KOASHI MASATO (JP)
SASAKI TOSHIHIKO (JP)
Application Number:
PCT/JP2022/047040
Publication Date:
June 29, 2023
Filing Date:
December 21, 2022
Export Citation:
Assignee:
NAT INST INF & COMM TECH (JP)
UNIV TOKYO (JP)
UNIV TOKYO (JP)
International Classes:
H04L9/12; H04B10/112; H04B10/70
Foreign References:
| JP2016154324A | 2016-08-25 | |||
| JP2020145672A | 2020-09-10 | |||
| JP2019216413A | 2019-12-19 |
Other References:
HONJO, TOSHIMORI ET AL.: "24a-BT-5 Towards backbone network QKD", 58TH SPRING MEETING OF THE JAPAN SOCIETY OF APPLIED PHYSICS AND RELATED SOCIETIES; YOKOHAMA, JAPAN; MARCH 24-27, 2011, JAPAN SOCIETY OF APPLIED PHYSICS, TOKYO, vol. 58, 1 January 2011 (2011-01-01) - 27 March 2011 (2011-03-27), Tokyo, pages 49, XP009546649, ISBN: 978-4-86348-155-8
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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