Title:
METHOD AND APPARATUS FOR IMPLEMENTING PRIVACY AMPLIFICATION IN QUANTUM KEY DISTRIBUTION
Document Type and Number:
WIPO Patent Application WO/2023/040427
Kind Code:
A1
Abstract:
A method and an apparatus for implementing privacy amplification in quantum key distribution. Participants of quantum key distribution comprise a first participant and a second participant, the first participant and the second participant having a shared first key pool, and the first key pool comprising a plurality of keys. The method is performed on a terminal of either the first participant or the second participant, and the method comprises: obtaining an auxiliary character string used in the present round of privacy amplification, the auxiliary character string being determined on the basis of a seed key determined from the first key pool and a first hash function agreed with the other participant; obtaining, by using a streaming means, a plurality of first bits in a first key after passing through information negotiation; and performing a preset inter-bit calculation operation on the plurality of first bits and bits at corresponding positions in the auxiliary character string to obtain a plurality of second bits so as to form a second key after privacy amplification.
Inventors:
MA XIONGFENG (CN)
HUANG YIZHI (CN)
HUANG YIZHI (CN)
Application Number:
PCT/CN2022/103967
Publication Date:
March 23, 2023
Filing Date:
July 05, 2022
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H04L9/06; H04L9/08
Foreign References:
| CN113810175A | 2021-12-17 | |||
| CN105553648A | 2016-05-04 | |||
| CN109756329A | 2019-05-14 | |||
| US11095439B1 | 2021-08-17 |
Attorney, Agent or Firm:
E-TONE INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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