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Quantum key dynamic updating method and system in optical network

A quantum key and key update technology, applied in the field of communication, can solve problems such as being vulnerable to attack and damage

Active Publication Date: 2017-05-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This key update method based on a fixed period has strong regularity and is easily damaged by attacks, so a more flexible key update method is needed

Method used

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  • Quantum key dynamic updating method and system in optical network
  • Quantum key dynamic updating method and system in optical network
  • Quantum key dynamic updating method and system in optical network

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Embodiment Construction

[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] Such as figure 2 The schematic diagram of the end-to-end quantum key distribution system shown is the basis for the specific implementation of the present invention.

[0042] Such as figure 2 As shown, the quantum key distribution system includes an Alice sender and a Bob receiver, and the Alice sender includes a quantum transmitter and a sender data transceiver; the Bob receiver includes a quantum receiver and a receiver data transceiver; The quantum key distribution system also includes an optical fiber connecting Alice's sender and Bob's receiver, and realizes the data channel (TDCh) shared by Alice's sender and Bob's receiver on the optical fiber through wav...

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Abstract

The present invention provides a quantum key dynamic updating method and system in an optical network. The method comprises a first step of generating a new quantum key in a data service duration and a key updating period according to a dynamic key updating mechanism; and a second step of acquiring a transmission resource of the new quantum key in the optical network, and transmitting the new quantum key to encrypt the one data service. The dynamic key updating mechanism is provided according to different requirement scenes of the optical network, and two specific quantum key updating period configuration policies are provided. Arrival of the key updating request is triggered dynamically according to the quantum key updating period configuration policies, so that the problem that the quantum key fixed updating period is easy to damage is solved. A retransmitting mechanism for quantum key updating failure is provided, is used for processing the quantum key updating failure, and ensures effective transmission of the quantum key so as to ensure encrypted transmission of the data service.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a method and system for dynamically updating a quantum key in an optical network. Background technique [0002] At present, there are great security problems and hidden dangers in the optical network, and the quantum key distribution (Quantum Key Distribution, QKD) system can provide security encryption guarantee for the optical network. Since quantum itself has "absolute security" in theory, the quantum key distribution system can guarantee the absolute security of key transmission. In the optical network based on the quantum key distribution system, the feasibility of the quantum key in the optical network encryption process is ensured by using wavelength division multiplexing technology in the optical fiber to establish data channels, quantum key channels, and measurement-based channels. The data channel is used to transmit data services, the quantum ke...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L9/16
CPCH04L9/0852H04L9/0891H04L9/16
Inventor 郁小松王华赵永利张会彬张杰
Owner BEIJING UNIV OF POSTS & TELECOMM
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