Single-state semi-quantum key distribution system and method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for quantum key distribution and arming
Pending Publication Date: 2021-10-29
SOUTH CHINA NORMAL UNIVERSITY
View PDF5 Cites 2 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The purpose of the embodiment of the present application is to provide a single-state half-quantum key distribution system and method, which uses selective modulation to realize the single-state half-quantum key distribution protocol, and solves the problem of unreason
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0053] see figure 1 , figure 1 It is a structural block diagram of a single-state half-quantum key distribution system in the embodiment of this application.
[0054] The single-state half-quantum key distribution system of the embodiment of the present application includes a sending end and a receiving end, wherein the sending end includes a signal light unit 1, an optical transmission unit 2, a phase modulator unit 3 and a detector unit 4, and the signal light unit 1. The optical transmission unit 2 and the phase modulator unit 3 are connected in sequence, the phase modulator unit 3 is connected to the receiving end, the detector unit 4 is connected to the phase modulator unit 3 and the optical transmission unit 2, and the phase modulator unit 4 is an unequal arm Interferometer;
[0055] The receiving end includes an intensity modulator unit 5, the intensity modulator unit 5 is connected to the non-equal interferometer, and the intensity modulator unit 5 is an interference...
Embodiment 2
[0082] see figure 1 and Figure 5 ,in, Figure 5 It is a schematic flow chart of a single-state half-quantum key distribution method in the embodiment of the present application. A single-state half-quantum key distribution method in the embodiment of the present application includes:
[0083] Step S110, the signal light unit 1 generates light pulses, and transmits them to the non-equal interferometer via the light transmission unit 2;
[0084] Step S120, the non-equal-arm interferometer processes the received optical pulses to obtain a first pulse group, and sends the first pulse group to the interference loop;
[0085] Step S130, the interference loop processes the received first pulse group to obtain a second pulse group, and sends the second pulse group to the non-equal interferometer;
[0086] Step S140, the non-equal arm interferometer processes the received second pulse group to obtain a third pulse group, and sends the third pulse group to the optical transmission u...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a single-state semi-quantum key distribution system and method.The system comprises a sending end and a receiving end, the sending end comprises a signal light unit, a light transmission unit, a phase modulator unit and a detector unit, and the signal light unit, the light transmission unit and the phase modulator unit are sequentially connected; the detector unit is connected with the phase modulator unit and the light transmission unit, and the phase modulator unit is a non-equal-arm interferometer; the receiving end comprises an intensity modulator unit, the intensity modulator unit is connected with the phase modulator unit, and the intensity modulator unit is an interference loop; and the interference loop is used for loading voltage to the received optical pulse group sent by the non-equal-arm interferometer to obtain a processed optical pulse group, and sending the processed optical pulse group to the non-equal-arm interferometer. According to the system and the method, a selective modulation mode is adopted to realize a single-state semi-quantum key distribution protocol, the problem of unreasonable design of an existing system is solved, and the system and the method have extremely high safety and practical application feasibility.
Description
technical field [0001] This application relates to the field of quantum secure communication, in particular, to a single-state half-quantum key distribution system and method. Background technique [0002] At present, with the use of computers and the Internet in the field of communication, the encryption requirements for communication data are gradually increasing. Among data encryption methods, some encryption methods that depend on computational complexity still have a certain possibility of being deciphered, while quantum cryptography is based on Heisenberg’s uncertainty principle and the principle of uncloning of unknown quantum states, which can achieve In theory, it meets the requirements of the "one-time pad" encryption system and has theoretical unconditional security. [0003] Among them, in 1984, Bennett and Brassard proposed the first quantum key distribution protocol. After that, the communication parties of the quantum key distribution protocol are often defin...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more