Quantum key security evaluation method, quantum key security evaluation device and medium

Abstract

The invention relates to a quantum key security evaluation method, a quantum key security evaluation device and a medium. The quantum key security evaluation method comprises the following steps: acquiring an optical pulse signal sequence of quantum key security to be determined, wherein the optical pulse signal sequence comprises a quantum key sent by a sender to a receiver; and in response to determining that the optical pulse signal sequence is a non-independent pulse sequence and the optical pulse signal sequence has a post-pulse effect, determining the security of the quantum key included in the optical pulse signal sequence based on detecting a first detection rate of the optical pulse signal sequence. Through the quantum key security evaluation method provided by the invention, the security of the quantum key sent by the sender to the receiver can be determined according to the influence of the post-pulse effect and based on the detected first detection rate of the optical pulse signal sequence in the process of sending the optical pulse signal sequence. Therefore, the accuracy of detecting the security of the quantum key is improved, and the obtained evaluation result is more accurate.

Description

technical field [0001] The present disclosure relates to the field of communication technology, in particular to a quantum key security assessment method, a quantum key security assessment device and a medium. Background technique [0002] Quantum secure communication technology utilizes the physical properties of quantum to ensure the unconditional security of communication. In the nearly two decades since the BB84 protocol was proposed, most of the security proofs of the Quantum Key Distribution (QKD) protocol are based on the infinite code length. However, under actual conditions, the data transmitted by the two communicating parties must be limited. , so the security analysis of the QKD protocol under the condition of limited code length has become the focus of attention. Among the existing quantum communication protocols, the Measurement Device Independent Quantum Key Distribution (MDI-QKD) scheme has strong practicability, but the statistical fluctuation of its measur...

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Problems solved by technology

Among the existing quantum communication protocols, the Measurement Device Independent Quantum Key Distribution (MDI-QKD) scheme has strong practicability, but the statistical fluctuation of its measurement parameters must be considered under the condition of limited code length question

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