CN107819568B - Information detection method and device based on constellation point distance and receiving equipment - Google Patents
Information detection method and device based on constellation point distance and receiving equipment Download PDFInfo
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- CN107819568B CN107819568B CN201711131935.3A CN201711131935A CN107819568B CN 107819568 B CN107819568 B CN 107819568B CN 201711131935 A CN201711131935 A CN 201711131935A CN 107819568 B CN107819568 B CN 107819568B
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- 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
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
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Abstract
The embodiment of the invention discloses an information detection method based on constellation point distance, which comprises the following steps: receiving the first carrier information after channel matching; carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information; carrying out relevant processing on the second carrier information to obtain fourth carrier information; comparing the third carrier information with the fourth carrier information to determine points corresponding to the third carrier information and the fourth carrier information; determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram; judging whether the first distance is greater than a second distance; if yes, determining that the first carrier information contains secret information. The invention can accurately detect the secret information.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information detection method and apparatus based on constellation point distances, and a receiving device.
Background
Replacing steganography means that after channel coding, the original information is embedded with the stego information, and the stego information directly replaces the original partial information to achieve the purpose of information hiding.
Currently, in steganography analysis technology, in terms of detection of Least Significant Bit (LSB) steganography, the chi-square detection method is the earliest detection algorithm, which tests the probability of the image having such statistical characteristics by defining a chi-square statistic, realizes detection of sequential LSB replacement, but cannot detect LSB replacement at random positions. The detection algorithm aiming at LSB matching basically adopts methods such as neural network and pattern recognition to train a feature set to extract effective features, and then realizes the detection of the secret information through the joint judgment of a plurality of features, but the methods have large computation amount, inaccurate detection result and limitation.
Disclosure of Invention
The embodiment of the invention discloses an information detection method, an information detection device and receiving equipment based on constellation point distance, which can accurately detect secret information.
The first aspect of the embodiments of the present invention discloses an information detection method based on constellation point distances, including:
receiving the first carrier information after channel matching;
carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information;
carrying out relevant processing on the second carrier information to obtain fourth carrier information;
comparing the third carrier information with the fourth carrier information to determine points corresponding to the third carrier information and the fourth carrier information;
determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
judging whether the first distance is greater than a second distance;
if yes, determining that the first carrier information contains secret information.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the performing correlation processing on the first carrier information to sequentially obtain second carrier information, original carrier information, and third carrier information includes:
demodulating the first carrier information to obtain second carrier information;
decoding and recoding the second carrier information to obtain original carrier information;
and re-modulating the original carrier information to obtain third carrier information.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the performing correlation processing on the second carrier information to obtain fourth carrier information includes:
and carrying out remodulation processing on the second carrier information to obtain fourth carrier information.
As an optional implementation manner, in the first aspect of this embodiment of the present invention, the method further includes:
and if the first distance is smaller than or equal to the second distance, determining that the first carrier information does not have the secret information.
A second aspect of an embodiment of the present invention discloses an information detection apparatus, including:
a receiving unit, configured to receive the first carrier information after channel matching;
the processing unit is used for carrying out relevant processing on the first carrier information and sequentially obtaining second carrier information, original carrier information and third carrier information;
the processing unit is further configured to perform correlation processing on the second carrier information to obtain fourth carrier information;
a comparison determination unit that compares the third carrier information with the fourth carrier information to determine a point at which the third carrier information corresponds to the fourth carrier information;
the determining unit is used for determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
a judging unit, which judges whether the first distance is larger than a second distance;
and the judging unit is used for judging that the first carrier information has the secret information when the judging unit judges that the first distance is greater than the second distance.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the performing, by the processing unit, correlation processing on the first carrier information, and sequentially obtaining second carrier information, original carrier information, and third carrier information includes:
demodulating the first carrier information to obtain second carrier information;
decoding and recoding the second carrier information to obtain original carrier information;
and re-modulating the original carrier information to obtain third carrier information.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the processing unit is further configured to perform correlation processing on the second carrier information, and obtaining fourth carrier information includes:
and carrying out remodulation processing on the second carrier information to obtain fourth carrier information.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the determining unit is further configured to determine that secret information does not exist in the first carrier information when the determining unit determines that the first distance is smaller than or equal to the second distance.
A third aspect of embodiments of the present invention discloses a receiving device, where the receiving device includes a processor and a memory, and the processor executes a computer program stored in the memory to implement the method for detecting information based on constellation point distances according to any one of the above first aspects.
A computer-readable storage medium storing at least one instruction, which when executed by a processor, implements the method for detecting information based on distance between constellation points according to any one of the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the receiving device can receive the first carrier information after channel matching; carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information; carrying out relevant processing on the second carrier information to obtain fourth carrier information; comparing the third carrier information with the fourth carrier information to determine points corresponding to the third carrier information and the fourth carrier information; determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram; judging whether the first distance is greater than a second distance; if yes, determining that the first carrier information contains secret information. Therefore, by implementing the embodiment of the present invention, the receiving device may perform correlation processing on the received first carrier information to obtain the second carrier information, the original carrier information, and the third carrier information in sequence, and the receiving device may perform correlation processing on the second carrier information to obtain the fourth carrier information, and further, compare, analyze, and judge the fourth carrier information and the third carrier information to determine that the secret information exists in the first carrier information, so that the secret information can be accurately detected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of an alternative steganographic communication model disclosed in an embodiment of the present invention;
fig. 2 is a schematic flowchart of an information detection method based on constellation point distances according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an information detection apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a receiving device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first", "second", "third" and "fourth", etc. in the description and claims of the present invention and the above-mentioned drawings are used for distinguishing different objects and are not used for describing a specific order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses an information detection method, an information detection device and receiving equipment based on constellation point distance, which can accurately detect secret information. The following detailed description is made with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a communication model diagram of replacing steganography according to an embodiment of the present invention. As shown in fig. 1, the communication model of replacing steganography may include two processes: a transmission process and a reception process.
Wherein the sending process is mainly performed by the sending device. The transmitting device may include a base station or a user equipment. A base station (e.g., access point) can refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base station (NodeB) in WCDMA, or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, which is not limited in the embodiment of the present invention. The user Device may include, but is not limited to, a smart Phone, a notebook Computer, a Personal Computer (PC), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, and smart glasses), and other electronic devices, wherein an operating system of the user Device may include, but is not limited to, an Android operating system, an IOS operating system, a Symbian operating system, a blackberry operating system, a Windows Phone8 operating system, and the like, and embodiments of the present invention are not limited thereto.
In the sending process, the sending equipment is divided into two paths, one path is that carrier information is coded, the other path is that secret information is coded, after the two paths are coded, the secret information is embedded into the carrier information to be modulated, and then the carrier information is sent into a channel and sent to the receiving equipment through the channel.
Wherein the receiving process is mainly performed by the receiving device. Wherein, the receiving device may comprise a base station or a user equipment. A base station (e.g., access point) can refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base station (NodeB) in WCDMA, or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, which is not limited in the embodiment of the present invention. The user Device may include, but is not limited to, a smart Phone, a notebook Computer, a Personal Computer (PC), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, and smart glasses), and other electronic devices, wherein an operating system of the user Device may include, but is not limited to, an Android operating system, an IOS operating system, a Symbian operating system, a blackberry operating system, a Windows Phone8 operating system, and the like, and embodiments of the present invention are not limited thereto.
In the receiving process, after demodulating the received signal, the receiving device extracts the demodulated signal and then decodes the demodulated signal to obtain the secret information, and then decodes the signal from which the secret information is extracted to obtain the carrier information.
Specifically, the specific embedding manner of the secret information can be illustrated by taking BINARY phase shift keying (BINARY PHASE SHIFTKEYING, BPSK) as an exampleThe carrier information is changed into a 0 sequence and a 1 sequence after being coded, the secret information is also the 0 sequence and the 1 sequence after being coded, the secret information can randomly replace some positions of the carrier information to hide the information, at the moment, the 0 of the carrier information can be replaced by the 1 of the secret information, the 1 of the carrier information can be replaced by the 0 of the secret information, and the change from-1 to 1 and the change from 1 to-1 can be realized after BPSK. Of course, to ensure that the original carrier information can be subsequently recovered, the number of bits of the stego information needs to be less than the number of bits that can be corrected by the error correction capability of the carrier information. For example, assuming that the encoded information bits have k bits and a total of n symbols, the number of bits that can be corrected
And taking an integer, so that the bit number of the secret information is less than t, and the replacing steganography can be carried out.
Referring to fig. 2, fig. 2 is a schematic flowchart of an information detection method based on constellation point distances according to an embodiment of the present invention. As shown in fig. 2, the information detection method based on the constellation point distance may include the following steps:
Replacing steganography means that after channel coding, the original information is embedded with the stego information, and the stego information directly replaces the original partial information to achieve the purpose of information hiding.
In the invention, the sending equipment sends out the carrier information after replacing the steganography through a channel, and the receiving equipment can obtain the first carrier information after channel matching, wherein the first carrier information is information after coding modulation.
The formula of channel matching is as follows:
where Y is the carrier information multiplied by channel H, conj (H) is the conjugate of H, and Y1 is the first carrier information.
Specifically, the manner of performing, by the receiving device, the relevant processing on the first carrier information and sequentially obtaining the second carrier information, the original carrier information, and the third carrier information may specifically be:
demodulating the first carrier information to obtain second carrier information;
decoding and recoding the second carrier information to obtain original carrier information;
and re-modulating the original carrier information to obtain third carrier information.
In the invention, the second carrier information is decoded, so that the secret information which is possibly hidden in the second carrier information can be erased, and the original carrier information can be obtained after recoding. Wherein the first carrier information may comprise stego information and the third carrier information does not comprise stego information.
And 203, the receiving device performs correlation processing on the second carrier information to obtain fourth carrier information.
Specifically, the receiving device performs remodulation processing on the second carrier information to obtain fourth carrier information. Preferably, the modulation is digital modulation.
In the invention, the hidden information which is possibly hidden in the second carrier information can be erased by decoding the second carrier information, so that the second carrier information is remodulated to obtain the fourth carrier information which is the same as the second carrier information and is possibly hidden in the fourth carrier information.
The third carrier information is obtained by digitally modulating the original carrier information, and the fourth carrier information is obtained by digitally modulating the second carrier information, so that the third carrier information and the fourth carrier information can be represented by a constellation diagram.
Wherein the fourth carrier information is obtained by digitally modulating the second carrier information, and the second carrier information is obtained by demodulating the first carrier information. Since the first carrier information is affected by noise, and the noise will jitter near the constellation point of the first carrier information, a misjudgment will occur on the constellation point of the fourth carrier information, however, after the information is replaced, the deviation from the constellation point will exceed the jitter of the noise.
Usually, corresponding points of the third carrier information and the fourth carrier information are determined, after finding out the corresponding points, a first distance between the corresponding points is determined, and in addition, a second distance between adjacent constellation points on the constellation is determined.
Wherein, the distance calculation formula is as follows:
Y＝Y3-Y4
where Y3 is the corresponding point coordinate on the third carrier information constellation, Y4 is the corresponding point coordinate on the fourth carrier information constellation, Y is the coordinate corresponding to the first distance, and R is the distance value of the first distance.
Random noise may be included at corresponding points where the constellation points coincide, and random noise and stego information may be included at corresponding points where the constellation points differ. The existence of noise enables the vicinity of the constellation point of the first carrier information to shake, so misjudgment can occur on the constellation point of the fourth carrier information, however, after the information is replaced, the deviation from the constellation point can exceed the shaking of the noise. Therefore, whether the secret information exists can be judged according to the distance between the corresponding points
The noise is random gaussian noise, so the existence of the noise causes the jitter near the constellation point of the first carrier information.
In the invention, because the first carrier information is influenced by noise and the noise can shake near the constellation point of the first carrier information, the constellation point of the fourth carrier information can be misjudged, however, after the information is replaced, the deviation from the constellation point can exceed the shake of the noise, and therefore, the judgment of the secret information can be carried out according to the first distance between the corresponding points and the second distance between the adjacent constellation points.
The digital modulation may be QPSK, PSK, QAM, among others.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an information detecting apparatus according to an embodiment of the present invention. The information detection apparatus described in fig. 3 may be used to perform part or all of the steps in the information detection method described in fig. 2, please refer to the related description in fig. 2, which is not repeated herein. As shown in fig. 3, the information detecting apparatus may include:
a receiving unit 101, configured to receive the first bearer information after channel matching;
a processing unit 102, configured to perform relevant processing on the first carrier information, and sequentially obtain second carrier information, original carrier information, and third carrier information;
the processing unit 102 is further configured to perform correlation processing on the second carrier information to obtain fourth carrier information;
a comparison determination unit 103, configured to determine a point where the third carrier information corresponds to the fourth carrier information, by comparing the third carrier information with the fourth carrier information;
a determining unit 104, configured to determine a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
a judging unit 105, which judges whether the first distance is larger than a second distance;
a determining unit 106, configured to determine that the hidden information exists in the first carrier information when the determining unit determines that the first distance is greater than the second distance.
Optionally, the performing, by the processing unit 102, relevant processing on the first carrier information, and sequentially obtaining the second carrier information, the original carrier information, and the third carrier information includes:
demodulating the first carrier information to obtain second carrier information;
decoding and recoding the second carrier information to obtain original carrier information;
and re-modulating the original carrier information to obtain third carrier information.
Optionally, the processing unit 102 is further configured to perform correlation processing on the second carrier information, and obtaining fourth carrier information includes:
and carrying out remodulation processing on the second carrier information to obtain fourth carrier information.
Optionally, the determining unit 106 is further configured to determine that secret information does not exist in the first carrier information when the determining unit 105 determines that the first distance is smaller than or equal to the second distance.
Wherein, the information detection apparatus described in fig. 3 is implemented to receive the first carrier information after channel matching; carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information; carrying out related processing on the second carrier information to obtain fourth carrier information; the third carrier information and the fourth carrier information are used for determining corresponding points of the third carrier information and the fourth carrier information; determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram; judging whether the first distance is greater than a second distance; when the first distance is larger than the second distance, the secret information in the first carrier information is judged to exist, and therefore the secret information can be accurately detected.
The integrated unit implemented in the form of a software functional module may be stored in a computer readable storage medium. Wherein the computer readable storage medium may store a computer program which, when executed by a processor, may implement the steps of the above-described respective method embodiments. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as appropriate according to the requirements of legislation and patent practice in the jurisdiction.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a receiving device according to an embodiment of the present invention. The receiving device shown in fig. 4 includes a processor 801 and a memory 802. The processor 801 and the memory 802 are connected to a communication bus, respectively. The memory 802 may be a high-speed RAM memory or a non-volatile memory (non-volatile memory). Those skilled in the art will appreciate that the configuration of the receiving device shown in fig. 4 is not intended to limit the present invention, and may be a bus configuration, a star configuration, a combination of more or fewer components than those shown in fig. 4, or a different arrangement of components.
The processor 801 is a control center of the receiving device, and may be a Central Processing Unit (CPU), and the processor 801 connects various parts of the receiving device by using various interfaces and lines, and executes or executes software programs and/or modules stored in the memory 802 and calls program codes stored in the memory 802 to perform the following operations:
receiving the first carrier information after channel matching;
carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information;
carrying out relevant processing on the second carrier information to obtain fourth carrier information;
comparing the third carrier information with the fourth carrier information to determine points corresponding to the third carrier information and the fourth carrier information;
determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
judging whether the first distance is greater than a second distance;
if yes, determining that the first carrier information contains secret information.
As an optional implementation manner, the performing correlation processing on the first carrier information to sequentially obtain second carrier information, original carrier information, and third carrier information includes:
demodulating the first carrier information to obtain second carrier information;
decoding and recoding the second carrier information to obtain original carrier information;
and re-modulating the original carrier information to obtain third carrier information.
As an optional implementation manner, the performing the correlation process on the second carrier information to obtain fourth carrier information includes:
and carrying out remodulation processing on the second carrier information to obtain fourth carrier information.
As an alternative embodiment, the processor 801 may also call the program code stored in the memory 802 to perform the following operations:
and if the first distance is smaller than or equal to the second distance, determining that the first carrier information does not have the secret information.
In the receiving apparatus depicted in fig. 4, the receiving apparatus receives the first bearer information after channel matching; carrying out relevant processing on the first carrier information to sequentially obtain second carrier information, original carrier information and third carrier information; carrying out relevant processing on the second carrier information to obtain fourth carrier information; comparing the third carrier information with the fourth carrier information to determine points corresponding to the third carrier information and the fourth carrier information; determining a first distance between the corresponding points and a second distance between adjacent constellation points on the constellation diagram; judging whether the first distance is greater than a second distance; if yes, determining that the first carrier information contains secret information. Therefore, by implementing the embodiment of the present invention, the receiving device may perform relevant processing on the received first carrier information, sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and further compare, analyze, and determine the first carrier information, the second carrier information, the original carrier information, and the third carrier information, so as to determine that the secret information exists in the first carrier information, thereby accurately detecting the secret information.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The method, the device and the receiving device for detecting information based on the constellation point distance disclosed by the embodiment of the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. An information detection method based on constellation point distance is characterized by comprising the following steps:
receiving the first carrier information after channel matching;
performing correlation processing on the first carrier information to obtain second carrier information, original carrier information and third carrier information in sequence, performing demodulation processing on the first carrier information to obtain the second carrier information, performing decoding and recoding processing on the second carrier information to obtain the original carrier information, and performing digital modulation on the original carrier information to obtain the third carrier information;
carrying out correlation processing on the second carrier information to obtain fourth carrier information, and carrying out digital modulation processing on the second carrier information to obtain fourth carrier information;
comparing the third carrier information with the fourth carrier information to determine corresponding points of the third carrier information and the fourth carrier information, representing the third carrier information and the fourth carrier information by a constellation diagram, and determining constellation points of the corresponding points;
determining a first distance between the constellation points of the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
judging whether the first distance is greater than a second distance;
if yes, determining that the first carrier information contains secret information.
2. The method of claim 1, further comprising:
and if the first distance is smaller than or equal to the second distance, determining that the first carrier information does not have the secret information.
3. An information detecting apparatus, characterized by comprising:
a receiving unit, configured to receive the first carrier information after channel matching;
the processing unit is used for carrying out relevant processing on the first carrier information, sequentially obtaining second carrier information, original carrier information and third carrier information, demodulating the first carrier information to obtain second carrier information, decoding and recoding the second carrier information to obtain original carrier information, and carrying out digital modulation on the original carrier information to obtain third carrier information;
the processing unit is further configured to perform correlation processing on the second carrier information to obtain fourth carrier information, and perform digital modulation processing on the second carrier information to obtain fourth carrier information;
a comparison determination unit, configured to compare the third carrier information with the fourth carrier information to determine a corresponding point of the third carrier information with the fourth carrier information, and represent the third carrier information and the fourth carrier information by a constellation map to determine a constellation point of the corresponding point;
the determining unit is used for determining a first distance between the constellation points of the corresponding points and a second distance between adjacent constellation points on the constellation diagram;
the judging unit is used for judging whether the first distance is greater than a second distance;
and the judging unit is used for judging that the first carrier information has the secret information when the judging unit judges that the first distance is greater than the second distance.
4. The information detecting apparatus according to claim 3,
the determining unit is further configured to determine that the first carrier information does not have the secret information when the determining unit determines that the first distance is smaller than or equal to the second distance.
5. A receiving device, characterized in that the receiving device comprises a processor and a memory, the processor executing a computer program stored by the memory to implement the information detection method according to any one of claims 1 to 2.
6. A computer-readable storage medium storing at least one instruction which, when executed by a processor, implements the information detection method of any one of claims 1 to 2.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310235A (en) * | 2013-05-31 | 2013-09-18 | 中国科学院信息工程研究所 | Steganalysis method based on parameter identification and estimation |
| CN105846994A (en) * | 2016-03-24 | 2016-08-10 | 深圳大学 | Physical layer steganography method and physical layer steganography system |
| CN105959103A (en) * | 2016-04-25 | 2016-09-21 | 深圳大学 | Steganalysis method and steganalysis device based on Hamming distance category number |
| CN106683031A (en) * | 2016-12-30 | 2017-05-17 | 深圳大学 | Feature extraction method and extraction system for digital image steganalysis |
| CN107292315A (en) * | 2016-04-11 | 2017-10-24 | 北京大学 | Steganalysis method and hidden information analysis device based on multiple dimensioned LTP features |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7957280B2 (en) * | 2006-06-16 | 2011-06-07 | Bittorrent, Inc. | Classification and verification of static file transfer protocols |
| US8965038B2 (en) * | 2012-02-01 | 2015-02-24 | Sam Houston University | Steganalysis with neighboring joint density |
-
2017
- 2017-11-15 CN CN201711131935.3A patent/CN107819568B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103310235A (en) * | 2013-05-31 | 2013-09-18 | 中国科学院信息工程研究所 | Steganalysis method based on parameter identification and estimation |
| CN105846994A (en) * | 2016-03-24 | 2016-08-10 | 深圳大学 | Physical layer steganography method and physical layer steganography system |
| CN107292315A (en) * | 2016-04-11 | 2017-10-24 | 北京大学 | Steganalysis method and hidden information analysis device based on multiple dimensioned LTP features |
| CN105959103A (en) * | 2016-04-25 | 2016-09-21 | 深圳大学 | Steganalysis method and steganalysis device based on Hamming distance category number |
| CN106683031A (en) * | 2016-12-30 | 2017-05-17 | 深圳大学 | Feature extraction method and extraction system for digital image steganalysis |
Non-Patent Citations (1)
| Title |
|---|
| 针对LSB匹配的图像隐写分析技术研究;刘学谦;《中国优秀硕士学位论文全文数据库》;20121231;全文 * |
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