CN111314048A - Chaotic secret optical communication system based on double random phase codes - Google Patents
Chaotic secret optical communication system based on double random phase codes Download PDFInfo
- Publication number
- CN111314048A CN111314048A CN202010141865.5A CN202010141865A CN111314048A CN 111314048 A CN111314048 A CN 111314048A CN 202010141865 A CN202010141865 A CN 202010141865A CN 111314048 A CN111314048 A CN 111314048A
- Authority
- CN
- China
- Prior art keywords
- chaotic
- phase
- signal
- random
- modulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000739 chaotic effect Effects 0.000 title claims abstract description 126
- 238000004891 communication Methods 0.000 title claims abstract description 29
- 230000003287 optical effect Effects 0.000 title claims abstract description 21
- 239000006185 dispersion Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000013307 optical fiber Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2525—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0863—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving passwords or one-time passwords
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a chaotic secret optical communication system based on double random phase codes, which comprises a sending end, a receiving end and a secret optical communication module, wherein the sending end is used for carrying out intensity modulation on chaotic optical signals and secret data; the double random phase coding device comprises a first phase modulation module, a dispersion device and a second phase modulation module; the first phase modulation module is driven by a random key sequence A, dynamically applies different first phase codes to the chaotic modulation signal in a time domain, then enters the dispersion device, interacts with the dispersion device, disturbs the intensity distribution of the chaotic modulation signal in the time domain through the phase-intensity conversion of the dispersion device, and converts the waveform of the chaotic modulation signal into a random-like noise signal; the second phase modulation module is driven by the random key sequence B, performs second phase coding on the chaotic modulation signal, and performs phase scrambling on the chaotic signal. The invention obviously enhances the security of the secret data of the chaotic transmitting end.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a chaotic secret optical communication system based on double random phase codes.
Background
The chaotic secret communication has the advantages of high transmission rate, long distance, compatibility with the existing optical communication technology and the like. The chaotic secure optical communication utilizes the randomness of chaotic signals, hides the secure information in the chaotic signals in a physical layer, and recovers the original chaotic carrier signals through chaotic synchronization, thereby extracting the secure information.
In the chaotic secret communication system, the safety of chaotic signals mainly depends on whether the chaotic synchronization of a receiving end can be realized. An eavesdropper can realize chaotic synchronization only by constructing a chaotic receiver consistent with the structural parameters and the working parameters of the transmitter, so that confidential data can be stolen. Therefore, at the transmitting end, a key space formed by the structural parameters and the working parameters of the chaotic transmitter must be large enough, so that an eavesdropper can not reconstruct a receiving system similar to the chaotic transmitter by a physical exhaustive method; in the transmission process, the security of the chaotic communication system can be guaranteed only by ensuring that an eavesdropper cannot directly extract key parameters of a transmitter from the chaotic signal. Many researches show that time delay information related to the external cavity length can be generated by analyzing a time domain autocorrelation or time delay mutual information curve of a chaotic signal, the bias current of a laser is closely related to relaxation oscillation frequency, and an eavesdropper can obtain key information of the external cavity length and the bias current of the chaotic transmitter through analysis, so that the eavesdropper can construct a chaotic receiver consistent with the transmitter by continuously adjusting the key information on a single dimension of an external cavity feedback coefficient so as to steal secret data.
Aiming at the problem of parameter leakage of the chaotic transmitter, relevant scholars study on hiding and eliminating time delay information, but simultaneously increase the complexity of an internal structure of the chaotic light source, increase the requirements on the wavelength of the chaotic light source and the stability of an external feedback cavity, and reduce the robustness of chaotic synchronization.
In addition, the limited key space of the chaotic transmitter and the poor rapid reconfigurability of the key are also a key problem restricting the development of the chaotic secret communication technology. In this regard, some scholars at home and abroad perform early exploration including technical schemes of intracavity single feedback signal modulation of the chaotic laser, intracavity multi-feedback signal modulation of the chaotic laser, introduction of a frequency-dependent group delay hardware module in the cavity of the chaotic laser, and the like, but all of them make the hardware structure inside the chaotic resonant cavity very complicated, and the stability of the system and the robustness of chaotic synchronization also decrease.
Disclosure of Invention
The invention provides a chaotic secret optical communication system based on double random phase coding, aiming at solving the problems of key parameter leakage, limited key space and poor rapid key reconfigurability of a chaotic transmitter in the conventional chaotic secret optical communication system.
In order to achieve the purpose of the invention, the technical scheme is as follows: a chaotic secure optical communication system based on dual random phase encoding comprises
The transmitting end is used for carrying out intensity modulation on a chaotic light signal emitted by the chaotic light source and secret data to be transmitted to obtain a chaotic modulation signal;
the double random phase coding device is used for receiving chaotic modulation signals and comprises a first phase modulation module, a dispersion device and a second phase modulation module;
the first phase modulation module is driven by a random key sequence A and is used for dynamically applying different first phase codes to chaotic modulation signals at different moments in a time domain; the chaotic signal which is subjected to the first phase coding enters the dispersion device, interacts with the dispersion device, disturbs the intensity distribution of the chaotic modulation signal from a time domain through the phase-intensity conversion of the dispersion device, and converts the waveform of the chaotic modulation signal into a random-like noise signal;
the second phase modulation module is driven by the random key sequence B, carries out second phase coding on the chaotic modulation signal, and carries out phase scrambling on the chaotic signal converted by the dispersive device.
Preferably, the optical fiber is used for carrying out secret transmission on the chaotic modulation signal after the double random phase coding is finished.
The system further comprises a receiving end, wherein the receiving end is used for extracting original secret data in the chaotic modulation signal transmitted by the transmission optical fiber.
Further, the transmission fiber includes a single mode fiber and a corresponding dispersion compensating fiber.
Still further, the receiving end comprises a random phase decoding device and a chaotic synchronization receiver;
the phase modulation module arranged on the random phase decoding device is driven by the inverse code of the random key sequence B, and is used for decoding the chaotic encryption signal input by the transmission optical fiber and eliminating the phase disturbance applied to the chaotic encryption signal by the second phase modulation module of the double random phase encoding device in the sending end;
the chaotic synchronous receiver with chromatic dispersion opposite to that of the chromatic dispersion device in the transmitting end eliminates the intensity disturbance of the chaotic encrypted signal, thereby generating a decoding signal with the same intensity distribution as the original chaotic modulated signal.
Furthermore, the random key sequence A and the random key sequence B can be dynamically reconstructed, so that the key for chaotic signal encryption is changed according to the secret requirement of the sending end, and the secret communication effect is achieved.
Still further, the random key sequence a adopts a binary random key sequence.
The invention has the following beneficial effects:
the invention carries out signal scrambling processing by the double random phase encoding device, not only can effectively hide the time-frequency domain key characteristic parameters of the original chaotic signal, but also can greatly enlarge the key space of the chaotic communication system, and the length of the external cavity, the working current, the feedback coefficient of the external cavity, the dispersion size of the dispersion device, the speed of the random key and the key sequence can be used as the key parameters of the sending end, thereby obviously enhancing the security of the secret data of the chaotic sending end.
Drawings
Fig. 1 is a schematic diagram of the working principle of the chaotic secure optical communication system according to embodiment 1.
In the figure, 1-a transmitting end, 101-a chaotic light source, 102-secret data, 103-intensity modulation, 104-a random key sequence A, 105-a first phase coding, 106-a dispersive device, 107-a random key sequence B, 108-a second phase coding, 2-a legal receiver, 201-a decoding signal, 202-a chaotic synchronous receiver, 203-a random phase decoding device, 204-a random key sequence B, 205-a random phase decoding, 3-an illegal eavesdropper, 301-error data, 302-a fake receiver, 303-a dispersive adjustable device, 304-an error key and 305-a random phase decoding.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Example 1
As shown in FIG. 1, a chaotic secure optical communication system based on dual random phase encoding comprises
The transmitting terminal 1 is used for intensity modulating 103 a chaotic light signal 101 emitted by a chaotic light source and secret data 102 to be transmitted to obtain a chaotic modulation signal;
the double random phase coding device is used for receiving chaotic modulation signals and comprises a first phase modulation module, a dispersion device 106 and a second phase modulation module;
the first phase modulation module is driven by a random key sequence A104 and is used for dynamically applying different first phase codes 105 to chaotic modulation signals at different moments in a time domain; the chaotic signal passing through the first phase code 105 enters the dispersion device 106, interacts with the dispersion device 106, disturbs the intensity distribution of the chaotic modulation signal from the time domain through the phase-intensity conversion of the dispersion device 106, converts the waveform of the chaotic modulation signal into a random-like noise signal, destroys the time-frequency domain distribution characteristics of the original external cavity feedback chaotic light source, eliminates the external cavity feedback time delay and relaxation oscillation frequency characteristics, and further hides two key parameters of the external cavity length and the working current of the chaotic light source. The random key sequence a104 described in this embodiment is a binary random key sequence.
The second phase modulation module is driven by a random key sequence B107, performs second phase coding 108 on the chaotic modulation signal, performs phase scrambling on the chaotic signal converted by the dispersive device 106, and sends the chaotic signal to a transmission optical fiber; the second-time phase encoding 108 does not change the intensity of the input chaotic signal any more, but because a random phase is applied, if the subsequent chaotic signal undergoes an additional dispersion effect, the intensity distribution of the input chaotic signal can be disturbed again, so that an eavesdropper can be effectively prevented from recovering the original chaotic modulation signal by simply compensating the dispersion of the dispersion device 106 in the double-random phase encoding system, and further stealing the key parameter of the time-frequency domain.
In the embodiment, the chaotic modulation signal is converted into a random noise-like signal which cannot be analyzed from a time domain and a frequency domain by combining phase-intensity conversion, so that key parameters of a transmitter are hidden; meanwhile, the advantages of hardware encryption based on a dispersion device and rapid reconfigurable random digital key encryption are combined, the key dimension and the key space of the chaotic transmitter are obviously enlarged, the difficulty of an eavesdropper in cracking the system is greatly increased, and finally the safety of the chaotic optical communication system is enhanced.
In a specific embodiment, the system further comprises a transmission optical fiber for carrying out secret transmission on the chaotic modulation signal after the double random phase coding is finished; the transmission fiber comprises a single mode fiber and a corresponding dispersion compensation fiber.
In a specific embodiment, the receiving end performs extraction of original secret data in the chaotic modulation signal transmitted by the transmission optical fiber. The receiving end comprises a random phase decoding device 203 and a chaotic synchronization receiver 202; the legal receiver 2 completes the extraction of the original secret data from the chaotically encrypted signal through the random phase decoding device 203 and the chaotically synchronous receiver 202.
The phase modulation module arranged in the random phase decoding device 203 is driven by the inverse code of the random key sequence B107, and decodes the chaotic encryption signal input by the transmission optical fiber, and eliminates the phase disturbance applied to the chaotic encryption signal by the second phase modulation module of the double random phase encoding device in the sending end;
the chaotic synchronization receiver 202, which has a dispersion opposite to that of the dispersive device 106 described in the transmitting end, cancels the intensity disturbance of the chaotic encrypted signal, thereby generating a decoded signal 201 having the same intensity distribution as the original chaotic modulated signal.
On the contrary, for an illegal eavesdropper, key parameters such as an external cavity length, a working current, an external cavity feedback coefficient and the like of the chaotic transmitter cannot be directly eavesdropped from the transmitted encrypted chaotic signal, and the dispersion size and the random key sequence used by the double random phase encoding device at the transmitting end cannot be known, so that only the error key 304 can be obtained, the error key is transmitted to the random phase decoding 305 for decoding, and the error key is blindly adjusted by the single dispersion adjustable device 203 or the random key sequence and the dispersion are exhausted, and then the receiver 302 is forged for receiving the error data 301, which is difficult to demodulate the original secret data.
In a specific embodiment, the random key sequence a and the random key sequence B can be dynamically reconstructed, so that the key used for chaotic signal encryption can be rapidly changed according to the security requirement of the transmitting end, and a secure communication effect similar to a one-time pad is achieved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A chaos secret optical communication system based on two random phase codes is characterized in that: comprises that
The transmitting end is used for carrying out intensity modulation on a chaotic light signal emitted by the chaotic light source and secret data to be transmitted to obtain a chaotic modulation signal;
the double random phase coding device is used for receiving chaotic modulation signals and comprises a first phase modulation module, a dispersion device and a second phase modulation module;
the first phase modulation module is driven by a random key sequence A and is used for dynamically applying different first phase codes to chaotic modulation signals at different moments in a time domain; the chaotic signal which is subjected to the first phase coding enters the dispersion device, interacts with the dispersion device, disturbs the intensity distribution of the chaotic modulation signal from a time domain through the phase-intensity conversion of the dispersion device, and converts the waveform of the chaotic modulation signal into a random-like noise signal;
the second phase modulation module is driven by the random key sequence B, carries out second phase coding on the chaotic modulation signal, and carries out phase scrambling on the chaotic signal converted by the dispersive device.
2. The chaotic secure optical communication system based on the dual random phase encoding of claim 1, wherein: the optical fiber is used for carrying out secret transmission on the chaotic modulation signal after the double random phase coding is finished.
3. The chaotic secure optical communication system based on the dual random phase encoding of claim 2, wherein: the device also comprises a receiving end which extracts original secret data in the chaotic modulation signal transmitted by the transmission optical fiber.
4. The chaotic secure optical communication system based on the dual random phase encoding of claim 3, wherein: the transmission fiber comprises a single mode fiber and a corresponding dispersion compensation fiber.
5. The chaotic secure optical communication system based on the dual random phase encoding of claim 4, wherein: the receiving end comprises a random phase decoding device and a chaotic synchronous receiver;
the phase modulation module arranged on the random phase decoding device is driven by the inverse code of the random key sequence B, and is used for decoding the chaotic encryption signal input by the transmission optical fiber and eliminating the phase disturbance applied to the chaotic encryption signal by the second phase modulation module of the double random phase encoding device in the sending end;
the chaotic synchronous receiver with chromatic dispersion opposite to that of the chromatic dispersion device in the transmitting end eliminates the intensity disturbance of the chaotic encrypted signal, thereby generating a decoding signal with the same intensity distribution as the original chaotic modulated signal.
6. The chaotic secure optical communication system based on the double random phase codes according to any one of claims 1 to 5, characterized in that: the random key sequence A and the random key sequence B can be dynamically reconstructed, so that the key for chaotic signal encryption is changed according to the secret requirement of a sending end, and the secret communication effect is achieved.
7. The chaotic secure optical communication system based on the dual random phase encoding of claim 6, wherein: the random key sequence A adopts a binary random key sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141865.5A CN111314048A (en) | 2020-03-04 | 2020-03-04 | Chaotic secret optical communication system based on double random phase codes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141865.5A CN111314048A (en) | 2020-03-04 | 2020-03-04 | Chaotic secret optical communication system based on double random phase codes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111314048A true CN111314048A (en) | 2020-06-19 |
Family
ID=71147865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010141865.5A Pending CN111314048A (en) | 2020-03-04 | 2020-03-04 | Chaotic secret optical communication system based on double random phase codes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111314048A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953473A (en) * | 2020-08-14 | 2020-11-17 | 北京邮电大学 | Signal processing method and device |
| CN112202499A (en) * | 2020-09-22 | 2021-01-08 | 武汉光迅科技股份有限公司 | Signal transmitting device, signal receiving device and chaotic encryption optical communication system |
| CN112751666A (en) * | 2020-12-16 | 2021-05-04 | 中国科学院半导体研究所 | Secure communication system and information transmission method |
| CN113179149A (en) * | 2021-03-12 | 2021-07-27 | 广东工业大学 | Secret optical communication system based on double-chaos phase encoding encryption |
| CN113794559A (en) * | 2021-10-11 | 2021-12-14 | 广东工业大学 | Physical layer secret communication system and method based on dispersion-phase encryption |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106651736A (en) * | 2016-09-30 | 2017-05-10 | 天津大学 | Optical image encryption method based on Gyrator transform and coupled chaos |
| CN107231227A (en) * | 2017-06-02 | 2017-10-03 | 电子科技大学 | A kind of communication system and communication means that chaotic carrier is spread based on ultra wide band |
| US20180309477A1 (en) * | 2017-04-24 | 2018-10-25 | Chaos Prime, Inc. | Communication system employing chaotic sequence based frequency shift keying spreading signals |
-
2020
- 2020-03-04 CN CN202010141865.5A patent/CN111314048A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106651736A (en) * | 2016-09-30 | 2017-05-10 | 天津大学 | Optical image encryption method based on Gyrator transform and coupled chaos |
| US20180309477A1 (en) * | 2017-04-24 | 2018-10-25 | Chaos Prime, Inc. | Communication system employing chaotic sequence based frequency shift keying spreading signals |
| CN107231227A (en) * | 2017-06-02 | 2017-10-03 | 电子科技大学 | A kind of communication system and communication means that chaotic carrier is spread based on ultra wide band |
Non-Patent Citations (2)
| Title |
|---|
| ANKE ZHAO: "Secure Optical Communication in Fiber-optical Systems based on Physical Encryption of Synchronized Chaos", 《ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP)》 * |
| 王超: "基于时间透镜的激光混沌信号扩频研究", 《中国优秀博硕士学位论文全文数据库(硕士) 信息科技辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953473A (en) * | 2020-08-14 | 2020-11-17 | 北京邮电大学 | Signal processing method and device |
| CN111953473B (en) * | 2020-08-14 | 2022-02-15 | 北京邮电大学 | Signal processing method and device |
| CN112202499A (en) * | 2020-09-22 | 2021-01-08 | 武汉光迅科技股份有限公司 | Signal transmitting device, signal receiving device and chaotic encryption optical communication system |
| CN112751666A (en) * | 2020-12-16 | 2021-05-04 | 中国科学院半导体研究所 | Secure communication system and information transmission method |
| CN112751666B (en) * | 2020-12-16 | 2022-07-22 | 中国科学院半导体研究所 | Secure communication system and information transmission method |
| CN113179149A (en) * | 2021-03-12 | 2021-07-27 | 广东工业大学 | Secret optical communication system based on double-chaos phase encoding encryption |
| CN113179149B (en) * | 2021-03-12 | 2022-11-04 | 广东工业大学 | Secret optical communication system based on double-chaos phase encoding encryption |
| CN113794559A (en) * | 2021-10-11 | 2021-12-14 | 广东工业大学 | Physical layer secret communication system and method based on dispersion-phase encryption |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111314048A (en) | Chaotic secret optical communication system based on double random phase codes | |
| CN106169951B (en) | Chaotic secret optical communication system based on dual-drive Mach-Zehnder modulator | |
| AR013585A1 (en) | APPARATUS METHOD FOR ESTABLISHING A KEY SEQUENCE TO ENSURE COMMUNICATION THROUGH A COMMUNICATION CHANNEL BETWEEN A FIRST TRANSCEIVER AND A SECOND TRANSCEIVER | |
| CN106160877B (en) | The cross-layer encryption method and system of fibre-optic transmission system (FOTS) | |
| CN106452750B (en) | A kind of quantum encryption communication method for mobile device | |
| EP3054611B1 (en) | Visible light signal sending and reception processing method, transmission end, reception end, and system | |
| CN109981245B (en) | Encryption and decryption method for character string | |
| CN113179149B (en) | Secret optical communication system based on double-chaos phase encoding encryption | |
| Sinha et al. | Encrypted information hiding using audio steganography and audio cryptography | |
| CN104065421A (en) | Wavelength-hopping chaotic secure communication method and system based on multi-mode lasers | |
| CN111259414A (en) | Method, device and equipment for encrypting audio stored in file | |
| CN105282090A (en) | Public URL encryption coding method for preventing illegal access on internet | |
| CN110535633A (en) | Quantum secret communication network system | |
| CN109981246B (en) | Encryption method and decryption method for character string | |
| CN113411136B (en) | Quadrature modulation secret optical communication device and method | |
| CN110535634A (en) | Audio-video transmission system based on quantum cryptography | |
| Kundu et al. | A secure approach to audio steganography | |
| CN116566597A (en) | Controllable security level covert communication method based on bit coin address confusion ciphertext | |
| Naidu et al. | Multilayer security in protecting and hiding multimedia data using cryptography and steganography techniques | |
| CN113612544B (en) | Optical chaotic secret communication system with four-dimensional secret key space | |
| CN110047181B (en) | Intelligent door lock safety control method based on Zigbee | |
| CN112636912A (en) | Data encryption verification algorithm based on network service | |
| Tirandaz et al. | Security Evaluation of the Mutual Random Phase Injection Scheme for Secret Key Generation over Static Point-to-Point Communications | |
| CN114221786B (en) | Novel communication hardware encryption system and method based on pulse compression | |
| Chang et al. | The scrambling cryptography implemented with chaotic sequence trigger optical switch algorithm in WDM passive optical network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200619 |