VERIFIABLE AND SECURE PRIVACY AMPLIFICATION METHOD FOR QUANTUM KEY DISTRIBUTION - DEYA INST OF CIVIL MILITARY INTEGRATED INNOVATION SHUNDE FOSHAN

Title:

VERIFIABLE AND SECURE PRIVACY AMPLIFICATION METHOD FOR QUANTUM KEY DISTRIBUTION

Document Type and Number:

WIPO Patent Application WO/2019/200660

Kind Code:

A1

Abstract:

Disclosed in the present invention is a verifiable and secure privacy amplification method for quantum key distribution, comprising the steps of: S1. generating an initial random number string W, two communication parties (Alice and Bob) respectively generating random number strings Kmis,A and Kmis,B during the basis comparison process of quantum key distribution, and then Alice merging the two random number strings into a random number string W = [Kmis,A, Kmis,B]; S2. performing randomness verification: after an error correction stage of quantum key distribution ends, estimating the lower limit of the minimum entropy Hmin(W|E) ≥ 1-H2(e) of W with respect to an attacker Eve; S3. calculating a final security key length Nf; S4. extracting a perfect random string W*: by pre-sharing part of the security key between the two communication parties, constructing a Toeplitz matrix HR, and extracting a perfect random number string W* from W according to HR; S5. issuing a negotiation-size universal hash function HPA according to W*; and S6. the two communication parties respectively performing, according to HPA, a hash operation on the error-corrected key string, so as to generate a final security key. The present invention has advantages such as being verifiable and secure, being easy to implement, and being able to simplify the design and implementation of a quantum key distribution system.

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Inventors:

WU CHUNQING (CN)

Application Number:

PCT/CN2018/088130

Publication Date:

October 24, 2019

Filing Date:

May 24, 2018

Export Citation:

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Assignee:

DEYA INST OF CIVIL MILITARY INTEGRATED INNOVATION SHUNDE FOSHAN (CN)

International Classes:

H04L9/08

Foreign References:

CN103713879A	2014-04-09
KR20170087646A	2017-07-31
US20090060185A1	2009-03-05

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