A quantum key distribution method and quantum key distribution network system
A quantum key distribution and key technology, applied in the field of quantum communication, can solve the problems of consuming large resources, difficult to fight, and the QKD protocol cannot be carried out.
Inactive Publication Date: 2020-04-17
INST OF INFORMATION ENG CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there are generally two problems in multi-user QKD networks: First, each point-to-point QKD system requires a transmitter, a receiver, and a quantum channel, while a QKD network with N users usually requires N(N-1) / 2 point-to-point QKD system, which consumes a lot of resources
Second, although many attacks on practical QKD systems can be detected and prevented, there is an attack method that is difficult to combat - denial of service (DOS) attack, the adversary can directly cut off the quantum channel or cause qubit errors exceeding the threshold Thus making the QKD protocol impossible
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below through specific embodiments and accompanying drawings.
[0041] 1. QKD network based on Blom scheme
[0042] The Blom key distribution scheme is an unconditionally secure key distribution system based on MDS in classical cryptography. Suppose there are N users in the system, as long as less than k users jointly attack the system, the system is unconditionally secure. Choose a prime number q that satisfies q>N. G is a k×N matrix on the finite field GF(q), any k columns of the matrix G are linearly independent, and the matrix G is public. The trusted center generates a k×k matrix D on the finite field GF(q), and then calculates P≡(DG) ⊥ And securely distribute the i-th row of the matrix P to the user U i . The key matrix K≡PG is an N×N symmetric matrix that satisfies K ij = K ji . For any two use...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a quantum key distribution (QKD) method and a quantum key distribution network system. The quantum key distribution method comprises steps that a center end used for quantumcommunication with various user ends is established, and the center end and the various user end adopt a key distribution scheme based on a Blom scheme and the QKD. One center end or a plurality of center ends can be provided. A quantum channel can be established between each pair of center ends, and a QKD protocol is executed between the center ends to combat DoS attacks; furthermore, a block design is adopted to form a quantum key distribution network. When the key distribution network is attacked by quantum rejection service, corresponding key distribution schemes can be provided by aiming at damages caused by different DoS attacks. The costs of the quantum key distribution can be reduced, and the safety and the expandability of the quantum key distribution can be improved.
Description
technical field [0001] The invention belongs to the technical field of quantum communication, and in particular relates to a quantum key distribution method and a quantum key distribution network system. Background technique [0002] So far, the research and implementation of quantum key distribution (Quantum Key Distribution, QKD) network is mainly based on point-to-point QKD system. However, there are generally two problems in multi-user QKD networks: First, each point-to-point QKD system requires a transmitter, a receiver, and a quantum channel, while a QKD network with N users usually requires N(N-1) / 2 point-to-point QKD system, which consumes a lot of resources. Second, although many attacks on practical QKD systems can be detected and prevented, there is an attack method that is difficult to combat - denial of service (DOS) attack, the adversary can directly cut off the quantum channel or cause qubit errors exceeding the threshold Thus making the QKD agreement imposs...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70H04L9/08H04L29/06
CPCH04B10/70H04L9/0852H04L63/1458
Inventor 杨理宋雅琪
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI