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Quantum secret sharing method based on hyper-entanglement assistance

A quantum secret and entanglement source technology, applied in the field of quantum communication, can solve the problem of low key generation rate, achieve the effects of eliminating key leakage, improving key transmission efficiency, and ensuring security

Active Publication Date: 2022-04-26
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only when the measurement bases selected by the three parties are the same, the key can be transferred, and the traditional GHZ state analysis can only distinguish 2 of the 8 GHZ states. The above two points lead to the low key generation rate of the original QSS

Method used

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  • Quantum secret sharing method based on hyper-entanglement assistance
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Embodiment Construction

[0055] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0056] Such as figure 1 As shown, the embodiment of the present invention provides a quantum secret sharing method based on super-entanglement assistance, including:

[0057] Step 1: User 1 uses a super-entangled source to prepare a large number of identical polarization (P)-momentum (M) super-entangled three-photon GHZ states for quantum communication. User 1 splits each super-entangled photon pair into three photon sequences, named sequences 1, 2, and 3, respectively. The form of the super-entangled three-photon GHZ state is Among them, |ψ 1 + > P It belongs to one of the 8 polarized GHZ states. Under the Z base and X base, the expressions of the 8 polarized GHZ states are:

[0058]

[0059]

[0060]

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[0065]

[0066] |H>, |V> are the base vectors of the Z base, rep...

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Abstract

According to the quantum secret sharing method based on hyper-entanglement assistance, a user 1 prepares a hyper-entanglement three-photon GHZ state and selects a security detection photon pair; and the user 1 sends two photons in all the hyper-entangled GHZ states to the user 2 and the user 3. After the photons are received, the user 1 publishes positions and measurement bases for safety detection of the photons; coding operation is carried out on photon pairs subjected to non-security detection, a user 2 and a user 3, and complete GHZ state analysis of polarization degree of freedom is carried out on the three users. The user 1 obtains the coded polarization GHZ state, and an original key is obtained; and for the photon pair for security detection, the three users use the measurement bases to measure photons in their hands, security detection is carried out, and if the measurement bases pass the security detection, the three users carry out error correction and private amplification on the original key to form a final security key. According to the method, base processing is not needed, the eight polarization GHZ states are completely distinguished, each hyper-entangled GHZ state can transmit a 3-bit key, the key generation efficiency is obviously improved, and the practicability is improved.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and in particular relates to a quantum secret sharing method based on super-entanglement assistance. Background technique [0002] Quantum communication is a method of information transmission using the basic principles of quantum mechanics. The security of quantum communication is based on the basic principles of quantum mechanics, including the no-cloning theorem, the non-locality of entanglement, etc. Any eavesdropper's eavesdropping behavior will destroy the state of the sent particles and be discovered by the communicating party. Therefore, quantum communication has absolute security, which is the biggest advantage that quantum communication is different from classical communication. [0003] Quantum cryptography is an important branch of quantum communication, mainly including quantum key distribution (QKD), quantum secret sharing (QSS), etc. QKD refers to the use of entang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/85
CPCH04L9/0858H04L9/085H04B10/70H04B10/85
Inventor 周澜居星星薛智文盛宇波钟伟
Owner NANJING UNIV OF POSTS & TELECOMM
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