Quantum security direct information communication method and system based on three degrees of freedom

A degree of freedom and safe technology, applied in the field of quantum communication, can solve the problems of reducing the security of secret information transmission, achieve the effect of improving communication efficiency, expanding the number of users, and avoiding internal leakage

Pending Publication Date: 2018-10-12
HENGTONG QASKY QUANTUM INFORMATION RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current multi-party quantum secure direct communication protocol, the communication parties must disclose some informati

Method used

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  • Quantum security direct information communication method and system based on three degrees of freedom
  • Quantum security direct information communication method and system based on three degrees of freedom
  • Quantum security direct information communication method and system based on three degrees of freedom

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Example

[0052] second embodiment

[0053] Corresponding to the quantum secure direct information communication method based on three degrees of freedom in the first embodiment, image 3 It shows a three-degree-of-freedom-based quantum-safe direct information communication system using the three-degree-of-freedom-based quantum-safe direct information communication method shown in the first embodiment in one-to-one correspondence. like image 3As shown, the quantum-safe direct information communication system 400 based on three degrees of freedom includes a server 410 , a first user terminal 420 , a second user terminal 430 and a third user terminal 440 . Among them, the implementation functions of the server 410, the first user terminal 420, the second user terminal 430, and the third user terminal 440 are in one-to-one correspondence with the corresponding steps in the first embodiment. stated.

[0054] The server 410 is used to randomly prepare N super-entangled Bell states and M ...

Example

[0064] third embodiment

[0065] An embodiment of the present invention also provides a storage medium, on which instructions are stored. When the instructions are run on a computer, when the computer program is executed by a processor, the three-based A quantum-safe direct information communication method with four degrees of freedom, in order to avoid repetition, will not be repeated here.

[0066] Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the technical solution of the present invention It can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), and include several instructions to make a computer device (which can be It is a personal computer, a server, or a net...

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Abstract

The invention provides a quantum security direct information communication method and system based on three degrees of freedom, and belongs to the technical field of quantum communication. A server prepares a super-entangled quantum state, forms a first sequence by using first photons in each Bell state to serve as an information carrier, and sequentially transmits the information carrier to a first user terminal, a second user terminal and a third user terminal. The first user terminal, the second user terminal and the third user terminal finally send back the first sequence to the server through encoding operations with three degrees of freedom in the first sequence respectively. The server can deduce the encoding modes of the first user terminal, the second user terminal and the third user terminal on each degree of freedom by performing super-entangled Bell state measurement on two sequences, in order to collect information. As the security is guaranteed by the non-local correlation features of the quantum entangled state, an eavesdropper can only steal a part of an entangled particle system at a time but cannot obtain the overall state of the quantum entanglement pair, therebyensuring that the information is not leaked.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a method and system for direct information communication of quantum security based on three degrees of freedom. Background technique [0002] Quantum communication is a major branch of quantum informatics, mainly involving quantum key distribution, quantum teleportation, quantum secure direct communication, etc. The research on quantum key distribution and quantum teleportation started early, and the development has been quite mature. Quantum secure direct communication is another important subfield of quantum communication. Its concept was first proposed by Long et al. in 2000, and it has been a research hotspot in recent years. Like the quantum key distribution protocol, the security of quantum secure direct communication is guaranteed by the quantum non-cloning principle, the quantum uncertainty principle, and the associativity and nonlocality of entangled part...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0852H04L9/0858
Inventor 陈姗姗赵良圆薛梦驰尹纪成
Owner HENGTONG QASKY QUANTUM INFORMATION RES INST CO LTD
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