Title:
WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/037661
Kind Code:
A1
Abstract:
A wireless communication system in which a first wireless device and a second wireless device anonymize information using a physical key and communicate in order to share the same common key without being affected by uncertainty due to error when using a common key for encrypted communication of unique physical quantities based on propagation characteristics, in which the first wireless device and the second wireless device share chronological change of dynamically changing propagation characteristics and communicate, the first wireless device transmits the least significant bit of a predetermined range of a first discrete value determined by the first wireless device on the basis of the propagation characteristics and a lower bit following the least significant bit in the first discrete value to the second wireless device, the second wireless device estimates a common key in the first wireless device from a second discrete value determined by the second wireless device on the basis of the propagation characteristics and from the least significant bit and the lower bit received from the first wireless device, and the common key becomes the physical key.
Inventors:
KANEKAWA NOBUYASU (JP)
TAKEI KEN (JP)
KANEKO SHIGENORI (JP)
IKEDA NAOHIRO (JP)
TAKEI KEN (JP)
KANEKO SHIGENORI (JP)
IKEDA NAOHIRO (JP)
Application Number:
PCT/JP2022/020511
Publication Date:
March 16, 2023
Filing Date:
May 17, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04K1/08; H04L9/08; H04W12/041; H04W12/65
Foreign References:
| JP2008199263A | 2008-08-28 | |||
| JP2021040258A | 2021-03-11 |
Other References:
TATSUYA MATSUMOTO, SHUICHI SASAOKA, MASATO IWAI : "Secret Key Agreement Scheme Using Random Number Transmission over a Public Channel and Partial Sequence Selection Based on Radio Propagation Characteristics", IEICE TRANSACTIONS ON COMMUNICATIONS, vol. J99-B, no. 9, 1 September 2016 (2016-09-01), pages 665 - 674, XP009544581, DOI: 10.14923/transcomj.2016APP0017
HASHIMOTO, TOORU ET AL.: "Security Evaluation of Wireless Secret Key Generation System Using ESPAR Antenna", IPSJ SYMPOSIUM SERIES, IPSJ, JP, vol. 2006, 25 October 2006 (2006-10-25) - 1 December 2006 (2006-12-01), JP , pages 669 - 672, XP009544445, ISSN: 1344-0640
HASHIMOTO, TOORU ET AL.: "Security Evaluation of Wireless Secret Key Generation System Using ESPAR Antenna", IPSJ SYMPOSIUM SERIES, IPSJ, JP, vol. 2006, 25 October 2006 (2006-10-25) - 1 December 2006 (2006-12-01), JP , pages 669 - 672, XP009544445, ISSN: 1344-0640
Attorney, Agent or Firm:
DAI-ICHI INTERNATIONAL PATENT OFFICE, P.C. (JP)
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