Key distribution method and device based on all-optical hiding, equipment and storage medium

Abstract

The invention discloses a key distribution method based on all-optical hiding. The method comprises the following steps: generating a sine microwave signal, processing the sine microwave signal through a microwave amplifier, modulating the sine microwave signal into a laser by combining a preset bias current, and outputting the modulated sine microwave signal in the form of an optical pulse signal; after the optical pulse signal is filtered based on the optical filter, the optical pulse signal processed by the optical coupler is sent to a receiving end; and a receiving end filters and suppresses noise in the received optical pulse signal, extracts phase information of the filtered and suppressed optical pulse signal, converts a phase difference into an amplitude difference of an electric pulse signal, and performs filtering and analog-to-digital conversion on the electric pulse signal to obtain a key waveform. The invention further discloses a key distribution device based on all-optical hiding, corresponding equipment and a storage medium. According to the key distribution method based on all-optical hiding, the key distribution efficiency can be improved, and the risk that the key is stolen is reduced.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and more specifically, to a key distribution method, device, equipment and storage medium based on all-optical hiding. Background Art

[0002] With the rapid development of information technology, information security issues are becoming increasingly prominent. Although traditional key distribution methods, such as encryption methods based on cryptography, can protect the transmission security of information to a certain extent, there is still a risk of being cracked. Especially in some sensitive areas, the demand for information security is more urgent. Therefore, it is necessary to find a more secure and reliable key distribution method.

[0003] With the continuous development of optical communication technology, optical communication has the characteristics of fast transmission speed, long transmission distance, strong anti-interference ability, etc. Therefore, there is an urgent need for a method of key distribution using optical communication technology. Summary of the invention

[0004] In response to at least one defect or improvement need in the prior art, the present invention provides a key distribution method, device, equipment and storage medium based on all-optical hiding, which can solve at least one of the technical problems existing in the above-mentioned background technology.

[0005] To achieve the above object, according to a first aspect of the present invention, a key distribution method based on all-optical hiding is provided, the method comprising:

[0006] Generate a sinusoidal microwave signal, process the sinusoidal microwave signal through a microwave amplifier, modulate the processed sinusoidal microwave signal into a laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal;

[0007] After filtering the optical pulse signal based on an optical filter, the optical pulse signal is processed by an optical coupler, and the coupled optical pulse signal is sent to a receiving end;

[0008] The receiving end filters and suppresses the noise in the received optical pulse signal, extracts the phase information of the filtered and suppressed optical pulse signal, converts the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, obtains the corresponding electrical pulse signal, filters and performs analog-to-digital conversion on the electrical pulse signal, and obtains the key waveform.

[0009] Furthermore, in the above-mentioned key distribution method based on all-optical hiding, there are two receiving ends, wherein the first receiving end directly receives the optical pulse signal after coupling processing, and the second receiving end receives the optical pulse signal after coupling processing via a transmission link.

[0010] Furthermore, in the above-mentioned key distribution method based on all-optical hiding, the optical pulse signal after coupling processing is sent to the receiving end, and before being transmitted via the transmission link, the optical pulse signal after coupling processing is dispersed by a dispersion module;

[0011] The dispersion processing includes processing the processed optical pulse signal into a noise-like signal in the time domain, and changing its frequency domain into a noise-like spectrum by controlling laser parameters;

[0012] After receiving the dispersion-processed optical pulse signal at the receiving end, the dispersion-processed optical pulse signal is processed by a dispersion compensation module to obtain the coupled optical pulse signal.

[0013] Furthermore, in the above-mentioned key distribution method based on all-optical hiding, the processed sinusoidal microwave signal is modulated into a laser, and the modulated sinusoidal microwave signal is output in the form of optical pulses, and the phase difference between the output optical pulses is random.

[0014] Furthermore, in the above-mentioned key distribution method based on all-optical hiding, the transmission link is a 25km transmission link.

[0015] Furthermore, in the above-mentioned key distribution method based on all-optical hiding, the receiving end filters and suppresses the noise in the received optical pulse signal, and extracts the phase information of the filtered and suppressed optical pulse signal, specifically including filtering and suppressing the common signal and noise in the link through an optical filter, and extracting the phase information in the received optical pulse signal through an AMZI module.

[0016] According to a second aspect of the present invention, there is also provided a key distribution device based on all-optical hiding, comprising:

[0017] A microwave signal source module, used for generating a sinusoidal microwave signal, and processing the sinusoidal microwave signal through a microwave amplifier;

[0018] A laser module, used to modulate the processed sinusoidal microwave signal into the laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal;

[0019] An optical coupler module is used to filter the optical pulse signal based on an optical filter, and then send the optical pulse signal after coupling processing to a receiving end through an optical coupler;

[0020] The bandpass filter module is used to filter and suppress the noise in the optical pulse signal received by the receiving end;

[0021] The AMZI module is used to extract the phase information of the optical pulse signal after filtering and suppression, convert the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, and obtain the corresponding electrical pulse signal;

[0022] The analog-to-digital conversion module is used to filter and perform analog-to-digital conversion on the electrical pulse signal to obtain a key waveform.

[0023] According to the third aspect of the present invention, there is also provided a key distribution device based on all-optical hiding, which comprises at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit executes the steps of any one of the above-mentioned methods.

[0024] According to the fourth aspect of the present invention, there is also provided a storage medium storing a computer program executable by a key distribution device based on all-optical hiding, and when the computer program runs on the key distribution device based on all-optical hiding, the key distribution device based on all-optical hiding executes the steps of any one of the above-mentioned methods.

[0025] According to a fifth aspect of the present invention, there is also provided a computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of any one of the above methods are implemented.

[0026] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0027] The key distribution method based on all-optical hiding provided by the present invention utilizes all-optical hiding for key distribution, which can realize high-speed and long-distance key distribution while ensuring the security of the key, which not only improves the efficiency of key distribution, but also reduces the risk of key theft. The high performance of protecting both communicating parties and the high-speed anti-interference characteristics of optical communication are combined with each other, which meets the current communication needs for improved information security and high concealment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a key distribution method based on all-optical hiding provided in an embodiment of the present application;

[0030] Figure 2A schematic diagram of the structure of an all-optical hidden key distribution device provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of a receiving end of an all-optical hidden key distribution device is provided for an embodiment of the present application;

[0032] Figure 4 A schematic diagram of a key waveform extracted by a first receiving end provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of a key waveform extracted by a second receiving end provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a cross-correlation function of output waveforms of a first receiving end and a second receiving end provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of a signal spectrum of a signal intercepted by a third party provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of a signal waveform of a signal intercepted by a third party provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] The terms "first", "second", "third", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0039] Figure 1 A schematic diagram of the process of the key distribution method based on all-optical hiding provided in the embodiment of the present application is shown in FIG. Figure 1 As shown, the key distribution method based on all-optical hiding provided in the embodiment of the present application includes:

[0040] Generate a sinusoidal microwave signal, process the sinusoidal microwave signal through a microwave amplifier, modulate the processed sinusoidal microwave signal into a laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal;

[0041] After filtering the optical pulse signal based on an optical filter, the optical pulse signal is processed by an optical coupler, and the coupled optical pulse signal is sent to a receiving end;

[0042] The receiving end filters and suppresses the noise in the received optical pulse signal, extracts the phase information of the filtered and suppressed optical pulse signal, converts the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, obtains the corresponding electrical pulse signal, filters and performs analog-to-digital conversion on the electrical pulse signal, and obtains the key waveform.

[0043] Specifically, Figure 2 This is a schematic diagram of the structure of the all-optical hidden key distribution device provided in the embodiment of the present application. Figure 2 The process of the key distribution method based on all-optical hiding provided in the embodiment of the present application is described.

[0044] A sine microwave signal is generated and emitted by a microwave signal source. After being amplified by a microwave amplifier, the amplified sine microwave signal is modulated into the laser in combination with a preset bias current. The laser outputs the modulated and amplified sine microwave signal in the form of optical pulses. The phase difference between the output optical pulses is random. The bias current is pre-selected to have a suitable current size according to the actual working requirements.

[0045] The output optical pulse signal is filtered by an optical filter to filter out the optical noise in the pulse and then input into the optical coupler. On the other hand, the ASE (amplified spontaneous emission) light source generates an optical signal, which is processed by an attenuator and a notch filter and then input into the optical coupler. The optical coupler couples the above signal and sends it to the receiving end.

[0046] At the receiving end, the common signal and noise signal in the link are first filtered and suppressed through an optical filter, and then the optical pulse phase information is extracted through the MZI module, and the phase difference of the optical pulse signal is converted into the amplitude difference of the electrical pulse signal. Because the generated optical pulse signal is truly random, the amplitude difference of the generated electrical pulse signal is also truly random, that is, an electrical pulse signal with a random amplitude is obtained, and the electrical pulse signal is filtered and digital-to-analog converted. After the digital-to-analog conversion processing, the key waveform diagram can be obtained in the key extraction. The random difference in the phase of the optical signal is converted into the random difference in the amplitude of the electrical signal, and a true random number, that is, the key, is obtained through analog-to-digital conversion.

[0047] The key distribution method based on all-optical hiding provided in the embodiment of the present application utilizes all-optical hiding for key distribution, which can realize high-speed and long-distance key distribution while ensuring the security of the key, which not only improves the efficiency of key distribution, but also reduces the risk of key theft. The high performance of protecting both communicating parties and the high-speed anti-interference characteristics of optical communication are combined with each other, which meets the current communication needs for increased information security and high concealment.

[0048] Optionally, in the key distribution method based on all-optical hiding provided in an embodiment of the present application, there are two receiving ends, wherein the first receiving end directly receives the optical pulse signal after coupling processing, and the second receiving end receives the optical pulse signal after coupling processing via a transmission link.

[0049] Optionally, in the key distribution method based on all-optical hiding provided in an embodiment of the present application, the optical pulse signal after coupling processing is sent to the receiving end, and before being transmitted via the transmission link, the optical pulse signal after coupling processing is dispersed by a dispersion module;

[0050] The dispersion processing includes processing the processed optical pulse signal into a noise-like signal in the time domain, and changing its frequency domain into a noise-like spectrum by controlling laser parameters;

[0051] After receiving the dispersion-processed optical pulse signal at the receiving end, the dispersion-processed optical pulse signal is processed by a dispersion compensation module to obtain the coupling-processed optical pulse signal.

[0052] Specifically, there can be two receiving ends, wherein the first receiving end directly receives the optical pulse signal after coupling processing and then extracts and processes the signal, and the second receiving end is connected to the optical coupler through a transmission link. It may be eavesdropped by a third party during the transmission process. Therefore, after the optical coupler generates the optical pulse signal after coupling processing, the optical pulse is widened by the dispersion module, and the widened signal is transmitted through the transmission link. The dispersion processing includes processing the processed optical pulse signal into a noise-like signal in the time domain, and changing its frequency domain into a noise-like spectrum by controlling the laser parameters, thereby forming a noise-like signal, and using this method to hide the process of key distribution. In this transmission process, the transmission signal is similar to the noise signal, and a third-party eavesdropper cannot notice the transmission signal, thereby completing the hiding of the signal. When the signal arrives at the second receiving end, the dispersion compensation module is first used to restore the signal to the optical pulse signal after coupling processing. The subsequent processing steps are the same as the processing process after the first receiving end receives it.

[0053] Optionally, in the key distribution method based on all-optical hiding provided in an embodiment of the present application, the processed sinusoidal microwave signal is modulated into a laser, and the modulated sinusoidal microwave signal is output in the form of optical pulses, and the phase difference between the output optical pulses is random.

[0054] Optionally, in the key distribution method based on all-optical hiding provided in an embodiment of the present application, the transmission link is a 25 km transmission link.

[0055] Specifically, the distance of the transmission link can be determined according to actual project needs and is not fixed to 25 km.

[0056] Optionally, in the key distribution method based on all-optical hiding provided in an embodiment of the present application, the receiving end filters and suppresses the noise in the received optical pulse signal, and extracts the phase information of the filtered and suppressed optical pulse signal, specifically including filtering and suppressing the common signal and noise in the link through an optical filter, and extracting the phase information in the received optical pulse signal through an AMZI module.

[0057] Specifically, Figure 3 The present application provides an embodiment of the all-optical hidden key distribution device receiving end structure diagram, such as Figure 3 As shown, at the receiving end, the optical signal output from the optical coupler is filtered and suppressed by an optical filter to remove the common signal and noise signal therein, and then transmitted to the AMZI module for restoration. The AMZI module is an asymmetric MZI module, and then the optical pulse phase information is extracted and balanced detection is performed by the balanced detection module. In the extraction process, an electric pulse signal with a random amplitude is first obtained, and this electric pulse signal with a random amplitude is filtered and analog-to-digital converted in a photoelectric detection device, and the optical signal is converted into an electrical signal and then into a digital signal. Finally, the digital key transmitted by the all-optical hidden distribution is obtained in the key extraction module.

[0058] In one embodiment, the key distribution method based on all-optical hiding provided by the present application is used for key transmission, wherein the transmission link of the second receiving end is a 25km transmission link. The key waveform extracted from the key at the first receiving end is as follows: Figure 4 As shown, the key waveform extracted from the key at the second receiving end is as follows Figure 5 As shown, after correlation analysis is performed on the key waveform extracted by the first receiving end in the key and the key waveform extracted by the second receiving end in the key, a schematic diagram of the cross-correlation function of the output waveforms of the first receiving end and the second receiving end is obtained as shown in Figure 6 As shown, it can be seen that when the key distribution method based on all-optical hiding provided by the present application is used for signal transmission, the signal remains undistorted after long-distance channeling and has good anti-interference performance.

[0059] A third party intercepted the spectral signal during the transmission link. Figure 7 As shown, the signal waveform obtained based on the intercepted spectral signal is as follows Figure 8 As shown, it can be seen that it is completely unrelated to the waveform analyzed by the second receiving end. Due to the concealment performance of the all-optical hidden device, the intercepted signal is covered by the optical signal, and the concealment performance of the all-optical hidden device is reflected. It meets the current communication requirements for information security and high concealment.

[0060] The embodiment of the present application further provides a key distribution device based on all-optical hiding, including:

[0061] A microwave signal source module, used for generating a sinusoidal microwave signal, and processing the sinusoidal microwave signal through a microwave amplifier;

[0062] A laser module, used to modulate the processed sinusoidal microwave signal into the laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal;

[0063] An optical coupler module is used to filter the optical pulse signal based on an optical filter, and then send the optical pulse signal after coupling processing to a receiving end through an optical coupler;

[0064] The bandpass filter module is used to filter and suppress the noise in the optical pulse signal received by the receiving end;

[0065] The AMZI module is used to extract the phase information of the optical pulse signal after filtering and suppression, convert the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, and obtain the corresponding electrical pulse signal;

[0066] The analog-to-digital conversion module is used to filter and perform analog-to-digital conversion on the electrical pulse signal to obtain a key waveform.

[0067] The present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0068] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0072] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0073] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program code.

[0074] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0075] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0076] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A key distribution method based on all-optical hiding, characterized in that: include: Generate a sinusoidal microwave signal, process the sinusoidal microwave signal through a microwave amplifier, modulate the processed sinusoidal microwave signal into a laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal; After filtering the optical pulse signal based on an optical filter, the optical pulse signal is processed by an optical coupler, and the coupled optical pulse signal is sent to a receiving end; The receiving end filters and suppresses the noise in the received optical pulse signal, extracts the phase information of the filtered and suppressed optical pulse signal, converts the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, obtains the corresponding electrical pulse signal, filters and performs analog-to-digital conversion on the electrical pulse signal, and obtains the key waveform.

2. The key distribution method based on all-optical hiding as claimed in claim 1, characterized in that: There are two receiving ends, wherein the first receiving end directly receives the optical pulse signal after coupling processing, and the second receiving end receives the optical pulse signal after coupling processing via a transmission link.

3. The key distribution method based on all-optical hiding as claimed in claim 2, characterized in that: The optical pulse signal after the coupling process is sent to the receiving end, and before being transmitted via the transmission link, the optical pulse signal after the coupling process is dispersed by a dispersion module; The dispersion processing includes processing the processed optical pulse signal into a noise-like signal in the time domain, and changing its frequency domain into a noise-like spectrum by controlling laser parameters; After receiving the dispersion-processed optical pulse signal at the receiving end, the dispersion-processed optical pulse signal is processed by a dispersion compensation module to obtain the coupled optical pulse signal.

4. The key distribution method based on all-optical hiding as claimed in claim 1, characterized in that: The processed sinusoidal microwave signal is modulated into a laser, and the modulated sinusoidal microwave signal is output in the form of light pulses, and the phase difference between the output light pulses is random.

5. The key distribution method based on all-optical hiding as claimed in claim 2, characterized in that: The transmission link is a 25km transmission link.

6. The key distribution method based on all-optical hiding as claimed in claim 1, characterized in that: The receiving end filters and suppresses the noise in the received optical pulse signal, and extracts the phase information of the filtered and suppressed optical pulse signal, specifically including filtering and suppressing the common signal and noise in the link through an optical filter, and extracting the phase information in the received optical pulse signal through an AMZI module.

7. A key distribution device based on all-optical hiding, characterized in that: include: A microwave signal source module, used for generating a sinusoidal microwave signal, and processing the sinusoidal microwave signal through a microwave amplifier; A laser module, used to modulate the processed sinusoidal microwave signal into the laser in combination with a preset bias current, and output the modulated sinusoidal microwave signal in the form of an optical pulse signal; An optical coupler module is used to filter the optical pulse signal based on an optical filter, and then send the optical pulse signal after coupling processing to a receiving end through an optical coupler; The bandpass filter module is used to filter and suppress the noise in the optical pulse signal received by the receiving end; The AMZI module is used to extract the phase information of the optical pulse signal after filtering and suppression, convert the phase difference of the optical pulse signal into the amplitude difference of the electrical pulse signal, and obtain the corresponding electrical pulse signal; The analog-to-digital conversion module is used to filter and perform analog-to-digital conversion on the electrical pulse signal to obtain a key waveform.

8. A key distribution device based on all-optical hiding, characterized in that: The method comprises at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit executes the steps of the method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: It stores a computer program executable by a key distribution device based on all-optical hiding. When the computer program runs on the key distribution device based on all-optical hiding, the key distribution device based on all-optical hiding executes the steps of any one of the methods described in claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the key distribution method based on all-optical hiding are implemented as claimed in any one of claims 1 to 6.

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