CN113992384B - Secret communication method based on fractional Fourier transform order multiplexing - Google Patents
Secret communication method based on fractional Fourier transform order multiplexing Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
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- H04L63/0227—Filtering policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
- H04L63/1416—Event detection, e.g. attack signature detection
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Abstract
The invention discloses a secret communication method based on fractional Fourier transform order multiplexing, which belongs to the technical field of communication and comprises the following specific steps: (1) receiving transmission data and recording data information; (2) security detecting the transmission data; (3) encrypting the transmission data to generate a communication frame; (4) monitoring the communication safety environment in real time; (5) receiving the communication frame and data decoding it; the invention can effectively prevent the transmission of illegal information, improve the safety and legal efficiency of maintaining the network environment, and is beneficial to purifying the network environment, ensuring the healthy internet surfing requirement of people, reducing the data leakage probability when the data is attacked by external personnel in the transmission process, ensuring the data safety, positioning the attack source position and being beneficial to maintaining the personal information safety and social security.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a secret communication method based on fractional Fourier transform order multiplexing.
Background
The secret communication is a branch of research of information secret technology and can be used as a credit, and is characterized in that secret measures are adopted, in addition to secret measures such as secret numbers, lingoes and passwords, the modern secret communication mainly adopts channel secret and information secret, the channel secret is a communication channel which enables a stealer to be difficult to intercept information, such as a special line, instant communication and radio spread spectrum communication, and the like, the information secret is carried out by concealing the transmitted information by adopting a method such as a contracted code password and the like and then transmitting the information, and the secret is carried out by adopting a secret machine along with the development of electronic technology. Data confidentiality becomes a very important problem because data confidentiality can have serious consequences; therefore, it is important to develop a secret communication method based on fractional fourier transform order multiplexing.
Through retrieval, chinese patent number CN108768927A discloses a secret communication method and device, and the invention is applicable to communication scenes with narrow communication bandwidth and deviation of system time of two communication parties, but cannot detect transmission data sent by a user, cannot effectively prevent illegal information from being transmitted, and cannot maintain the security and legitimacy of a network environment; in addition, when the existing secret communication method based on fractional Fourier transform order multiplexing is attacked by external personnel, data leakage is easy to occur, data security cannot be ensured, the attack source position cannot be positioned, and personal information security cannot be maintained; for this purpose, we propose a secret communication method based on fractional fourier transform order multiplexing.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a secret communication method based on fractional Fourier transform order multiplexing.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a secret communication method based on fractional Fourier transform order multiplexing comprises the following specific steps:
(1) Receiving transmission data and recording data information: the transmission module receives transmission data sent by a user, collects relevant information of the transmission data, classifies the collected transmission data, constructs an encryption record table by itself and records each group of information;
(2) And carrying out safety detection on the transmission data: the safety and the legality of the transmission data sent by the user are monitored, analyzed and judged;
(3) Encrypting the transmission data to generate a communication frame: carrying out data encryption on the transmission data conforming to the transmission rule, and simultaneously generating a communication frame by converting the encrypted transmission data into data;
(4) Monitoring the communication safety environment in real time: the communication frame transmission environment is monitored in real time, the external attack behavior is analyzed and processed, meanwhile, the attack source is positioned by the IP address, and the IP address is fed back to staff;
(5) Receiving a communication frame and data decoding it: the data receiving module receives the communication frame and sends the communication frame to the decryption algorithm module, and the decryption algorithm module decrypts and analyzes the received encrypted information by using a decryption algorithm and feeds the decrypted data back to the user.
Further, the specific steps of the classification process in the step (1) are as follows:
step one: information collection is carried out on the data type, the data length and the data size of the transmission data, and the data type, the data length and the data size are respectively input into an encryption record table;
step two: the system time when the data is received and transmitted is collected and marked as the transmission time, and is recorded in the encrypted recording table.
Further, the monitoring and analyzing in the step (2) specifically comprises the following steps:
the first step: performing abnormality investigation on the transmission data, if abnormal information exists in the transmission data, feeding the abnormal information back to a user, and stopping the subsequent transmission process;
and a second step of: if no abnormal information exists in the transmission data, the transmission module detects whether the illegal information exists in the transmission data, and if so, the user 'illegal information exists and cannot be transmitted' is fed back.
Further, the specific data encryption step in the step (3) is as follows:
i: constructing a fractional Fourier transmission multiplexer, extracting the data length from the encryption record table, and constructing a fractional Fourier transmission multiplexer comprehensive filter bank according to the data length;
II: introducing the transmission data into a fractional order Fourier multiplexing multiplexer comprehensive filter bank, and modulating the transmission data to generate a multiplexing signal;
III: the transmission time information is extracted from the encryption record table, and the time unit multiple calculation is carried out according to the transmission time information, wherein the specific calculation formula is as follows:
N s ＝int(T s /T u ) (1)
wherein N is s Representing a multiple of the transmission time unit, T s Representing the system time, T u Representing the length of a set time unit, int () is a rounding function;
IV: and confirming the time key information of the multiplexing signal transmission according to the calculated time unit multiple, and generating a communication frame by the multiplexing signal through data conversion processing.
Further, the specific steps of the analysis in the step (4) are as follows:
s1: when the communication frame is attacked by the outside in the transmission process, a firewall is started to defend attack data, and the IP address of an attack source is confirmed through the firewall;
s2: the method comprises the steps of carrying out communication connection with a GPS satellite, capturing an area image where an IP address is located, simultaneously feeding back the captured real address to a worker, and simultaneously sending alarm information to a related unit for processing;
s3: when the firewall cannot block external data invasion, the firewall can carry out data change or data destruction processing on the communication frame, so that data leakage is avoided, and processing information is fed back to staff.
Further, the decryption analysis in the step (5) specifically includes the following steps:
p1: recording the time of receiving the communication frame, recording the time as the receiving time, and confirming the sending time key information according to the receiving time;
p2: leading the communication frame into an analysis filter bank in a fractional Fourier multiplexer for data conversion processing to generate an output signal vector;
p3: each group of output signal vectors are converted into input signal vectors through extraction and decryption, transmission data recovery is carried out according to the input signal vectors, and meanwhile, the transmission data are fed back to a user.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the prior art of directly transmitting user data, the secret communication method based on fractional Fourier transform order multiplexing is characterized in that the security monitoring module is used for conducting abnormality investigation on transmission data before information transmission, if abnormal information exists in the transmission data, the transmission data is fed back to a user, the subsequent transmission process is stopped, if no abnormal information exists in the transmission data, the transmission module is used for detecting whether illegal information exists in the transmission data, if illegal information exists, the illegal information exists in the user and the user cannot be transmitted, transmission of the illegal information can be effectively prevented, security and legal efficiency of a maintenance network environment are improved, meanwhile, the network environment is purified, and healthy Internet surfing requirements of people are guaranteed;
2. according to the secret communication method based on fractional Fourier transform order multiplexing, the transmission module detects transmission data, the transmission data is subjected to data conversion processing through the fractional Fourier transform multiplexer to generate a communication frame for transmission, when the communication frame is attacked by the outside in the transmission process, a firewall is started to defend attack data, an attack source IP address is confirmed through the firewall, the firewall is in communication connection with a GPS satellite, an area image where the IP address is located is grabbed, meanwhile, the grabbed real address is fed back to staff, alarm information is sent to related units for processing, the probability of data leakage can be reduced when the data is attacked by the outside in the transmission process, the data safety is guaranteed, the attack source position can be positioned, and personal information safety and social security are maintained.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Fig. 1 is a flow chart of a secret communication method based on fractional order fourier transform order multiplexing according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Referring to fig. 1, a secret communication method based on fractional fourier transform order multiplexing, the embodiment mainly discloses a monitoring analysis method:
receiving transmission data and recording data information: the transmission module receives transmission data sent by a user, collects relevant information of the transmission data, classifies the collected transmission data, constructs an encryption record table by itself, and records each group of information.
Specifically, firstly, the transmission module collects information about the data type, the data length and the data size of the transmission data, and records the information in the encryption record table respectively, and the transmission module collects the system time when the transmission data is received and marks the system time as the sending time and records the system time in the encryption record table.
And carrying out safety detection on the transmission data: and monitoring, analyzing and judging the safety and the legality of the transmission data sent by the user.
Specifically, before information transmission, the safety monitoring module performs exception investigation on the transmission data, if abnormal information exists in the transmission data, the transmission data is fed back to a user, the subsequent transmission process is stopped, if no abnormal information exists in the transmission data, the transmission module detects whether illegal information exists in the transmission data, and if the illegal information exists, the user 'illegal information exists' is fed back, and the transmission cannot be performed.
It should be further noted that the anomaly information includes virus data and violation data.
Encrypting the transmission data to generate a communication frame: and carrying out data encryption on the transmission data conforming to the transmission rule, and simultaneously generating a communication frame by converting the encrypted transmission data into data.
Specifically, firstly, a transmission module constructs a fractional order Fourier multiplexing transmission multiplexer by itself, extracts the data length from an encryption record table, constructs a fractional order Fourier multiplexing transmission multiplexer comprehensive filter bank according to the data length, introduces transmission data into the fractional order Fourier multiplexing transmission multiplexer comprehensive filter bank after the construction is completed, modulates the transmission data to generate a multiplexing signal, extracts transmission time information from the encryption record table, calculates time unit multiples according to the transmission time information, confirms multiplexing signal transmission time key information according to the calculated time unit multiples, and generates a communication frame by data conversion processing of the multiplexing signal.
It should be further noted that the specific time unit multiple calculation formula is as follows:
N s ＝int(T s /T u ) (1)
wherein the method comprises the steps of，N s Representing a multiple of the transmission time unit, T s Representing the system time, T u Representing the length of the set time unit, int () is a rounding function.
Example 2
Referring to fig. 1, a secret communication method based on fractional fourier transform order multiplexing mainly discloses an analysis processing method except for the same structure as the above embodiment:
monitoring the communication safety environment in real time: the communication frame transmission environment is monitored in real time, the external attack behavior is analyzed and processed, meanwhile, the attack source is positioned by the IP address, and the IP address is fed back to staff.
Specifically, when the communication frame is attacked by the outside in the transmission process, a firewall is started to defend attack data, the firewall is used for confirming an IP address of an attack source, the GPS satellite is in communication connection with the GPS satellite, the area image where the IP address is located is grabbed, meanwhile, the grabbed real address is fed back to a worker, alarm information is sent to a relevant unit for processing, when the firewall cannot block the invasion of the outside data, the firewall can carry out data change or data destruction processing on the communication frame, data leakage is avoided, and meanwhile, processing information is fed back to the worker.
Receiving a communication frame and data decoding it: the data receiving module receives the communication frame and sends the communication frame to the decryption algorithm module, and the decryption algorithm module decrypts and analyzes the received encrypted information by using a decryption algorithm and feeds the decrypted data back to the user.
Specifically, when the data receiving module successfully receives the communication frame, the data receiving module records the time of receiving the communication frame and records the time as the receiving time, meanwhile, the data receiving module confirms the sending time key information according to the receiving time, after confirmation, the data receiving module guides the communication frame into an analysis filter bank in the fractional Fourier multiplexer to perform data conversion processing to generate output signal vectors, and each group of output signal vectors are extracted, decrypted and converted into input signal vectors, and the transmission data is recovered according to the input signal vectors, and meanwhile, the transmission data is fed back to a user.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. The secret communication method based on fractional Fourier transform order multiplexing is characterized by comprising the following specific steps of:
(1) Receiving transmission data and recording data information: the transmission module receives transmission data sent by a user, collects relevant information of the transmission data, classifies the collected transmission data, constructs an encryption record table by itself and records each group of information;
the classification processing specifically comprises the following steps:
step one: information collection is carried out on the data type, the data length and the data size of the transmission data, and the data type, the data length and the data size are respectively input into an encryption record table;
step two: collecting the system time when the data is received and transmitting the data, marking the system time as the transmitting time, and recording the system time in an encryption recording table;
(2) And carrying out safety detection on the transmission data: the safety and the legality of the transmission data sent by the user are monitored, analyzed and judged;
(3) Encrypting the transmission data to generate a communication frame: carrying out data encryption on the transmission data conforming to the transmission rule, and simultaneously generating a communication frame by converting the encrypted transmission data into data;
(4) Monitoring the communication safety environment in real time: the communication frame transmission environment is monitored in real time, the external attack behavior is analyzed and processed, meanwhile, the attack source is positioned by the IP address, and the IP address is fed back to staff;
(5) Receiving a communication frame and data decoding it: the data receiving module receives the communication frame and sends the communication frame to the decryption algorithm module, the decryption algorithm module decrypts and analyzes the received encrypted information by using a decryption algorithm, and meanwhile, the decrypted data is fed back to a user;
the specific data encryption step in the step (3) is as follows:
i: constructing a fractional Fourier transmission multiplexer, extracting the data length from the encryption record table, and constructing a fractional Fourier transmission multiplexer comprehensive filter bank according to the data length;
II: introducing the transmission data into a fractional order Fourier multiplexing multiplexer comprehensive filter bank, and modulating the transmission data to generate a multiplexing signal;
III: the transmission time information is extracted from the encryption record table, and the time unit multiple calculation is carried out according to the transmission time information, wherein the specific calculation formula is as follows:
N s ＝int(T s /T u ) (1)
wherein N is s Representing a multiple of the transmission time unit, T s Representing the system time, T u Representing the length of a set time unit, int () is a rounding function;
IV: confirming the time key information of the multiplex signal transmission according to the calculated time unit multiple, and generating a communication frame by the multiplex signal through data conversion processing;
the analysis in the step (4) specifically comprises the following steps:
s1: when the communication frame is attacked by the outside in the transmission process, a firewall is started to defend attack data, and the IP address of an attack source is confirmed through the firewall;
s2: the method comprises the steps of carrying out communication connection with a GPS satellite, capturing an area image where an IP address is located, simultaneously feeding back the captured real address to a worker, and simultaneously sending alarm information to a related unit for processing;
s3: when the firewall cannot block external data invasion, the firewall can carry out data change or data destruction processing on the communication frame, so that data leakage is avoided, and processing information is fed back to staff.
2. The secret communication method based on fractional fourier transform order multiplexing as recited in claim 1, wherein the security detection in the step (2) specifically comprises the following steps:
the first step: performing abnormality investigation on the transmission data, if abnormal information exists in the transmission data, feeding the abnormal information back to a user, and stopping the subsequent transmission process;
and a second step of: if no abnormal information exists in the transmission data, the transmission module detects whether the illegal information exists in the transmission data, and if so, the user 'illegal information exists and cannot be transmitted' is fed back.
3. The secret communication method based on fractional fourier transform order multiplexing as recited in claim 1, wherein the decryption analysis in step (5) specifically includes the steps of:
p1: recording the time of receiving the communication frame, recording the time as the receiving time, and confirming the sending time key information according to the receiving time;
p2: leading the communication frame into an analysis filter bank in a fractional Fourier multiplexer for data conversion processing to generate an output signal vector;
p3: each group of output signal vectors are converted into input signal vectors through extraction and decryption, transmission data recovery is carried out according to the input signal vectors, and meanwhile, the transmission data are fed back to a user.
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