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Detection method and device for resisting seed light attack

A detection device and optical attack technology, which is applied in the direction of secure communication devices, digital transmission systems, electrical components, etc., can solve the problems of low detection accuracy and high measurement noise

Pending Publication Date: 2022-07-01
QUANTUMCTEK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the existing detection methods, the seed light source uses a continuous light source, which will bring high measurement noise, resulting in low detection accuracy

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  • Detection method and device for resisting seed light attack
  • Detection method and device for resisting seed light attack
  • Detection method and device for resisting seed light attack

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Embodiment Construction

[0035] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example in order to fully convey the spirit of the invention to those skilled in the art to which the invention pertains. Accordingly, the present invention is not limited to the embodiments disclosed herein.

[0036] In the present invention, a detection device and method are proposed for performing attack detection on the QKD device under test to determine whether it can resist the seed light attack. Among them, on the basis of using the synchronization signal of the tested QKD device to achieve time synchronization between the tested QKD device and the detection device, the pulsed optical signal is used as the seed light to carry out the seed light attack, and based on the tested QKD device under attack conditions Single-photon detection counts (or variations thereof) of the emitted quan...

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Abstract

The invention provides a seed light attack resistant detection method and device with higher precision. Wherein time synchronization between the detection device and the QKD equipment is realized by using a synchronization signal of the QKD equipment, and pulsed light is used as an analog signal of seed light attack, so that low seed light power can be allowed, and single photon detection and high-precision time resolution measurement can be performed on a time window of an attacked quantum light signal; therefore, the background noise caused by limited isolation of the connector is effectively eliminated, and the detection precision is greatly improved.

Description

technical field [0001] The invention relates to the field of quantum secure communication, and particularly provides a detection method and device for resisting seed light attack. Background technique [0002] Quantum key distribution (QKD) is the first practical quantum information technology. At present, it has gradually matured, and commercial applications are gradually expanding. The main function of the quantum key distribution device is to provide an information-theoretically secure symmetric key distribution method. Using the security key distributed by QKD, combined with the encryption method of cryptography, can effectively ensure the security of communication. [0003] The theoretical security of QKD has been theoretically proven. However, in a real QKD device, there may be some deviations between the physical characteristics of the device and the theoretical description, which provides the possibility for eavesdroppers to obtain key information. This type of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/00
CPCH04L9/0852H04L9/002
Inventor 李东东马龑唐世彪
Owner QUANTUMCTEK