WO2019095176A1

WO2019095176A1 - Information detection method and apparatus based on packet energy difference value, and receiving device

Info

Publication number: WO2019095176A1
Application number: PCT/CN2017/111217
Authority: WO
Inventors: 谢宁; 谭杰
Original assignee: 深圳大学
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2019-05-23

Abstract

Disclosed is an information detection method based on a packet energy difference value. The method comprises: receiving first carrier information; processing the first carrier information to obtain second carrier information, original carrier information and third carrier information; determining an identical position and different positions of the second carrier information and the original carrier information; extracting a first numerical value at the identical position of the first carrier information and a second numerical value at the identical position of the third carrier information, and determining a first maximum value of an absolute value of a difference value of the first numerical value and the second numerical value; extracting a third numerical value at the different positions of the first carrier information and a fourth numerical value at the different positions of the third carrier information, and determining a second maximum value of an absolute value of a difference value of the third numerical value and the fourth numerical value; determining whether a difference value of the second maximum value and the first maximum value is greater than a pre-set threshold; and if so, determining that concealed information exists in the first carrier information. By means of the present invention, concealed information can be detected accurately.

Description

Information detection method, device and receiving device based on packet energy difference

Technical field

The present invention relates to the field of communications technologies, and in particular, to an information detection method, apparatus, and receiving device based on packet energy difference.

Background technique

Substitute steganography means that the original information is embedded in the secret information after channel coding, and the secret information is directly replaced with the original part information to achieve the purpose of information hiding.

At present, in the steganalysis technique, the chi-square detection method is the earliest detection algorithm for the detection of Least Significant Bit (LSB) steganography, which tests the image by defining a chi-square statistic. The probability of statistical characteristics enables detection of sequential LSB replacement, but does not detect LSB replacement at random locations. The detection algorithm for LSB matching basically adopts methods such as neural network and pattern recognition. The feature set is trained to extract effective features, and then the joint information of multiple features is used to detect the hidden information. However, these methods are computationally intensive. The test results are not precise enough and have limitations.

Summary of the invention

The embodiment of the invention discloses a method, a device and a receiving device for detecting information based on packet energy difference, which can accurately detect the secret information.

A first aspect of the embodiments of the present invention discloses an information detection method based on a packet energy difference, which includes:

Receiving, by the channel, the first carrier information;

Performing related processing on the first carrier information, and sequentially obtaining second carrier information, original carrier information, and third carrier information;

Comparing the second carrier information with the original carrier information to determine a location and a different location of the second carrier information and the original carrier information;

Extracting a first value at the same location of the first carrier information and extracting a second value at the same location of the third carrier information, and determining the first value and the second The first maximum value of the absolute value of the difference of the values;

Extracting a third value at the different location of the first carrier information and extracting a fourth value at the different location of the third carrier information, and determining the third value and the fourth a second maximum value of the absolute value of the difference of the values;

Determining whether a difference between the second maximum value and the first maximum value is greater than a preset threshold;

If yes, it is determined that the secret information exists in the first carrier information.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, the performing, by the related processing on the first carrier information, 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 re-encoding the second carrier information to obtain original carrier information;

The original carrier information is remodulated to obtain third carrier information.

As an optional implementation manner, in the first aspect of the embodiments of the present invention, the method further includes:

If the difference between the second maximum value and the first maximum value is less than or equal to the preset threshold, determining that there is no secret information in the first carrier information.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, the preset threshold is set according to a minimum distance of a constellation point and a pre-judgment of a received noise.

A second aspect of the embodiments of the present invention discloses an information detecting apparatus, including:

a receiving unit, configured to receive the first carrier information that is matched by the channel;

a processing unit, configured to perform correlation processing on the first carrier information, and sequentially obtain second carrier information, original carrier information, and third carrier information;

a comparison determining unit, configured to compare the second carrier information with the original carrier information to confirm Determining the second carrier information at the same location and different locations as the original carrier information;

An extraction determining unit, configured to extract a first value on the same location of the first carrier information and extract a second value on the same location of the third carrier information, and determine the first a first maximum value of an absolute value of a difference between the value and the second value;

The extraction determining unit is further configured to extract a third value at the different position of the first carrier information and extract a fourth value at the different position of the third carrier information, and determine a second maximum value of the absolute value of the difference between the third value and the fourth value;

a determining unit, configured to determine whether a difference between the second maximum value and the first maximum value is greater than a preset threshold;

The determining unit is configured to determine that the secret information exists in the first carrier information when the determining unit determines that the difference between the second maximum value and the first maximum value is greater than the preset threshold.

As an optional implementation manner, in a second aspect of the embodiments of the present invention, the processing unit performs related processing on the first carrier information, and sequentially obtains second carrier information, original carrier information, and third carrier information, including :

As an optional implementation manner, in the second aspect of the embodiment of the present invention, the determining unit is further configured to: when the determining unit determines that the difference between the second maximum value and the first maximum value is smaller than Or equal to the preset threshold, determining that there is no secret information in the first carrier information.

As an optional implementation manner, in the second aspect of the embodiment of the present invention, the preset threshold is set according to a minimum distance of a constellation point and a pre-judgment of a received noise.

A third aspect of the embodiments of the present invention discloses a receiving device, where the receiving device includes a processor and a memory, and the processor executes the computer program stored in the memory to implement the packet-based energy according to any one of the foregoing first aspects. Information detection method for difference.

A computer readable storage medium storing at least one instruction, the at least one instruction being executed by a processor to implement the Information detection method for packet energy difference.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

In the embodiment of the present invention, the receiving device may receive the first carrier information that is matched by the channel, perform related processing on the first carrier information, and obtain the second carrier information, the original carrier information, and the third carrier information in sequence; Second carrier information and the original carrier information to determine the same location and different location of the second carrier information as the original carrier information; extracting the first location on the same location of the first carrier information And a second value at the same position at which the third carrier information is extracted, and determining a first maximum value of an absolute value of a difference between the first value and the second value; extracting the first a third value at the different location of the carrier information and a fourth value at the different location of the third carrier information, and determining a difference between the third value and the fourth value a second maximum value of the absolute value; determining whether the difference between the second maximum value and the first maximum value is greater than a preset threshold; if yes, determining that the first carrier information is hidden Information. It can be seen that, in the embodiment of the present invention, the receiving device may perform related processing on the received first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and further, the first carrier information and the second The carrier information, the original carrier information, and the third carrier information are compared and analyzed 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 to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a diagram of a communication model for replacing steganography disclosed in an embodiment of the present invention;

2 is a flow of an information detection method based on packet energy difference disclosed in an embodiment of the present invention; Schematic diagram

3 is a schematic diagram of a maximum noise difference and a signal to noise ratio at the same position and at different positions according to an embodiment of the present invention;

4 is a schematic diagram of a detection success rate and a signal to noise ratio according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another difference in maximum noise and signal to noise ratio at the same position and at different positions according to an embodiment of the present invention; FIG.

6 is a schematic diagram of another detection success rate and a signal to noise ratio according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an information detecting apparatus according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a receiving device according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. 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 obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that the terms "first", "second", "third", "fourth" and the like in the specification and claims of the present invention and the above drawings are used to distinguish different objects instead of To describe a specific order. Furthermore, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment.

The embodiment of the invention discloses a method, a device and a receiving device for detecting information based on packet energy difference, which can accurately detect the secret information. The details are described below in conjunction with the drawings.

Please refer to FIG. 1. FIG. 1 is a diagram of a communication model for replacing steganography disclosed in an embodiment of the present invention. As shown in FIG. 1, the alternative steganographic communication model can include two processes: a transmitting process and a receiving process.

The sending process is mainly performed by the sending device. The sending device may include a base station or a user equipment. A base station (e.g., an access point) can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the embodiment of the present invention is not limited. User equipment 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 (such as a smart watch). Various types of electronic devices, such as smart bracelets and smart glasses, wherein the 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, and a BlackBerry operating system. The Windows Phone 8 operating system and the like are not limited in the embodiment of the present invention.

In the transmission process, the transmitting device is divided into two paths, one is that the carrier information is encoded, and the other is that the secret information is encoded. After the two are encoded, the secret information is embedded in the carrier information, modulated, and then sent to the channel. The channel is sent to the receiving device.

The receiving process is mainly performed by the receiving device. The receiving device may include a base station or a user equipment. A base station (e.g., an access point) can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the embodiment of the present invention is not limited. User equipment may include, but is not limited to, a smart phone, a notebook computer, a personal computer (PC), a personal digital assistant (PDA), Mobile Internet devices (MIDs), wearable devices (such as smart watches, smart bracelets, smart glasses) and other electronic devices, wherein the operating system of the user device may include but is not limited to Android operating system, IOS operation The system, the Symbian (Symbian) operating system, the Blackberry (Blackberry) operating system, the Windows Phone 8 operating system, and the like are not limited in the embodiment of the present invention.

In the receiving process, after the receiving device demodulates the received signal, the demodulated signal is extracted and then decoded to obtain the secret information, and then the signal after the secret information is extracted is decoded to obtain the carrier information.

Specifically, the specific embedding method of the secret information may be BINARY PHASE SHIFT KEYING (BPSK) as an example. The carrier information is encoded into 0, 1 sequence, and the secret information is also 0, 1 sequence. Then, the secret information can randomly replace some positions of the carrier information to hide the information. At this time, the carrier information 0 can be replaced by the secret information 1, and the carrier information 1 can be replaced by the secret information 0, after BPSK is - 1 changes to 1, 1 changes to -1. Of course, in order to ensure that the original carrier information can be restored later, the number of bits of the secret information needs to be smaller than the number of bits that can be corrected by the error correction capability of the carrier information. For example, suppose that the encoded information bits have k bits, for a total of n symbols, then the number of bits that can be corrected

Take an integer, so the number of bits of the secret information is less than t in order to replace the steganography.

Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of an information detection method based on packet energy difference disclosed in an embodiment of the present invention. As shown in FIG. 2, the information detection method based on the packet energy difference may include the following steps:

Step 201: The receiving device receives the first carrier information that is matched by the channel.

In the present invention, the transmitting device transmits the bearer-replaced bearer information through the channel, and the receiving device can obtain the first bearer information after the channel matching, wherein the first bearer information is the coded and modulated information. Wherein, the channel is a fading channel, that is, a channel whose channel fades with distance, If the distance is constant, the channel is constant.

Among them, the formula for channel matching is as follows:

Where Y is the carrier information after multiplying channel H, conj(H) is the conjugate of H, noise is noise, and Y1 is the first carrier information.

Step 202: The receiving device performs related processing on the first carrier information, and sequentially obtains second carrier information, original carrier information, and third carrier information.

Specifically, the manner in which the receiving device performs related processing on the first carrier information, and the second carrier information, the original carrier information, and the third carrier information are sequentially obtained may be:

In the present invention, by decoding the second carrier information, the hidden information that may be hidden in the second carrier information can be erased, and after re-encoding, the original carrier information can be obtained. The first carrier information may include secret information, and the third carrier information does not include secret information.

Step 203: The receiving device compares the second carrier information with the original carrier information to determine a location and a different location where the second carrier information is the same as the original carrier information.

In the present invention, the second carrier information and the original carrier information are each represented by a multi-bit value (such as 0, 1). The receiving device can compare the second carrier information with the original carrier information to determine the same location and different locations of the second carrier information as the original carrier information. For example, if the second carrier information is 00, the original carrier information is 01, and the second carrier information and the original carrier information are in the same position, the second carrier information and the The original carrier information has a different position in the second place.

Step 204: The receiving device extracts a first value on the same location of the first carrier information, and extracts a second value on the same location of the third carrier information, and determines the first value. a first maximum value of the absolute value of the difference from the second value.

Usually, random noise may be included at the same location, and may be included at different locations. Random noise and hidden information.

In the present invention, after determining the same location and different locations of the second carrier information and the original carrier information, the receiving device may extract the first value and extract the same value of the first carrier information. a second value at the same position of the third carrier information, for example, assuming that the second carrier information and the original carrier information are in the same position, the second carrier information and The different location of the original bearer information is the second bit, and the receiving device may extract the first value on the first bit of the first bearer information and extract the second value on the first bit of the third bearer information. .

Further, the receiving device may determine a first maximum value of an absolute value of a difference between the first value and the second value.

Wherein, the noise is random Gaussian noise, so the difference between the first value and the second value is a random variable, and the receiving device can determine the absolute value of the difference between the first value and the second value. The first maximum.

Step 205: The receiving device extracts a third value on the different location of the first carrier information, and extracts a fourth value on the different location of the third carrier information, and determines the third value. a second maximum value of the absolute value of the difference from the fourth value.

In the present invention, after determining the same location and different locations of the second carrier information and the original carrier information, the receiving device extracts a third value and the extraction location at the different locations of the first carrier information. a fourth value at the different position of the third carrier information, for example, assuming that the second carrier information and the original carrier information are in the same position, the second carrier information The second location is determined by the receiving device, and the receiving device may extract a third value on the second bit of the first carrier information and a fourth value on the second bit of the third carrier information.

Further, the receiving device may determine a second maximum value of the absolute value of the difference between the third value and the fourth value.

Wherein, the noise is random Gaussian noise, so the difference between the third value and the fourth value is a random variable, and the receiving device can determine the absolute value of the difference between the third value and the fourth value. The second maximum.

Step 206: The receiving device determines whether the difference between the second maximum value and the first maximum value is greater than a preset threshold. If yes, go to step 207. If no, go to step 208.

The preset threshold is set according to a minimum distance of the constellation point and a pre-judgment of the magnitude of the received noise. The minimum distance of the constellation point is related to the modulation order. Generally, as the modulation order increases, the preset threshold gradually decreases. In addition, if the received noise decreases, the preset threshold gradually decreases.

Wherein, when the modulation order is 2, the preset threshold is 1.5, and when the modulation order is 4, the preset threshold is 1.2.

Step 207: The receiving device determines that there is hidden information in the first carrier information, and ends the process.

Step 208: The receiving device determines that there is no secret information in the first carrier information.

Please refer to FIG. 3 and FIG. 4 together. FIG. 3 is a schematic diagram showing the difference of the maximum noise and the signal-to-noise ratio at the same position and different positions according to an embodiment of the present invention; FIG. 4 is a schematic diagram of the embodiment of the present invention. A schematic diagram of the detection success rate and signal to noise ratio. In FIG. 3, the modulation order M=2, and the abscissa SNR is the signal to noise ratio. It can be seen from Fig. 3 that the trend of the curve without hidden information and the curve with hidden information is different, that is, whether there is hidden information, the difference between the maximum noise and the signal-to-noise ratio at the same position and at different positions. It is different. 4 is a schematic diagram showing the detection success rate and the signal-to-noise ratio of the secret information by using the detection method of the present invention. As can be seen from FIG. 4, the detection success rate increases as the signal-to-noise ratio SNR increases, and when SNR At =20dB, the detection success rate is already close to one. Thus, the detection information of the present invention can accurately detect the secret information.

Referring to FIG. 5 and FIG. 6 together, FIG. 5 is a schematic diagram showing the difference of the maximum noise and the signal-to-noise ratio at the same position and different positions according to the embodiment of the present invention; FIG. 6 is another embodiment of the present invention. A schematic diagram of detection success rate and signal to noise ratio. In FIG. 5, the modulation order M=4, and the abscissa SNR is the signal to noise ratio. It can be seen from Fig. 5 that the trend of the curve without hidden information and the curve with hidden information is different, that is, whether there is hidden information, the difference between the maximum noise and the signal-to-noise ratio at the same position and at different positions. It is different. Figure 6 is a detection method using the detection method of the present invention Schematic diagram of the detection success rate and signal-to-noise ratio of the secret information. As can be seen from Figure 6, the detection success rate increases with the increase of the signal-to-noise ratio SNR. When the SNR=22dB, the detection success rate is close to 1. . Thus, the detection information of the present invention can accurately detect the secret information.

The method described in FIG. 2 is implemented, the receiving device may receive the first carrier information that is matched by the channel, and perform related processing on the first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information. Comparing the second carrier information with the original carrier information to determine the same location and different location of the second carrier information as the original carrier information; extracting the same location of the first carrier information a first value on the first value and a second value at the same position at which the third carrier information is extracted, and determining a first maximum value of an absolute value of a difference between the first value and the second value; Extracting a third value at the different location of the first carrier information and extracting a fourth value at the different location of the third carrier information, and determining the third value and the fourth Determining whether a difference between the second maximum value and the first maximum value is greater than a preset threshold; if yes, determining the first carrier letter There is hidden information in the interest. It can be seen that, in the embodiment of the present invention, the receiving device may perform related processing on the received first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and further, the first carrier information and the second The carrier information, the original carrier information, and the third carrier information are compared and analyzed to determine that the secret information exists in the first carrier information, so that the secret information can be accurately detected.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of an information detecting apparatus according to an embodiment of the present invention. The information detecting apparatus described in FIG. 7 may be used to perform some or all of the steps in the information detecting method described in FIG. 2 . For details, refer to the related description in FIG. 2 , and details are not described herein again. As shown in FIG. 7, the information detecting apparatus may include:

The receiving unit 101 is configured to receive the first carrier information that is matched by the channel;

The processing unit 102 is configured to perform correlation processing on the first carrier information, and sequentially obtain second carrier information, original carrier information, and third carrier information;

a comparison determining unit 103, configured to compare the second carrier information with the original carrier information to determine a location and a different location of the second carrier information and the original carrier information;

An extraction determining unit 104, configured to extract a first value on the same location of the first carrier information and extract a second value on the same location of the third carrier information, and determine the first a first maximum value of an absolute value of a difference between the value and the second value;

The extraction determining unit 104 is further configured to extract a third value on the different location of the first carrier information and extract a fourth value on the different location of the third carrier information, and determine a second maximum value of the absolute value of the difference between the third value and the fourth value;

The determining unit 105 is configured to determine whether a difference between the second maximum value and the first maximum value is greater than a preset threshold;

The determining unit 106 is configured to determine that the secret information exists in the first carrier information when the determining unit 105 determines that the difference between the second maximum value and the first maximum value is greater than the preset threshold.

Optionally, the processing unit 102 performs related processing on the first carrier information, and sequentially obtains the second carrier information, the original carrier information, and the third carrier information, including:

Optionally, the determining unit 106 is further configured to determine, when the determining unit 105 determines that the difference between the second maximum value and the first maximum value is less than or equal to the preset threshold. There is no hidden information in a carrier information.

Optionally, the preset threshold is set according to a minimum distance of the constellation point and a pre-judgment of the size of the received noise.

The information detecting apparatus described in FIG. 7 is configured to receive the first carrier information that is matched by the channel, and perform related processing on the first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information; Comparing the second carrier information with the original carrier information to determine the same location and different location of the second carrier information as the original carrier information; extracting the same location of the first carrier information a first value and a second value at the same position at which the third carrier information is extracted, and determining a first maximum value of an absolute value of a difference between the first value and the second value; extracting The different locations of the first carrier information a third value and a fourth value at the different position of the third carrier information, and determining a second maximum value of the absolute value of the difference between the third value and the fourth value; Determining whether a difference between the second maximum value and the first maximum value is greater than a preset threshold; if yes, determining that the first carrier information has secret information. It can be seen that, in the embodiment of the present invention, the receiving device may perform related processing on the received first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and further, the first carrier information and the second The carrier information, the original carrier information, and the third carrier information are compared and analyzed to determine that the secret information exists in the first carrier information, so that the secret information can be accurately detected.

The above-described integrated unit implemented in the form of a software function module can be stored in a computer readable storage medium. Wherein, the computer readable storage medium can store a computer program, which when executed by the processor, can implement the steps in the foregoing method embodiments. Wherein, the computer program comprises computer program code, which may be in the form of source code, object code form, executable file or some intermediate form. The computer readable storage medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read only memory (ROM, Read-Only Memory). ), random access memory (RAM, Random-Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. It should be noted that the content contained in the computer readable storage medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in a jurisdiction.

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a receiving device according to an embodiment of the present invention. The receiving device shown in FIG. 8 includes a processor 801 and a memory 802. The processor 801 and the memory 802 are respectively connected to the communication bus. The memory 802 may be a high speed RAM memory or a non-volatile memory. It will be understood by those skilled in the art that the structure of the receiving device shown in FIG. 8 does not constitute a limitation of the present invention, and it may be a bus-shaped structure or a star-shaped structure, and may further include more than that shown in FIG. More or less parts, or some parts, or different parts.

The processor 801 is a control center of the receiving device, and may be a central processing unit (Central) Processing Unit (CPU), processor 801 connects various portions of the entire receiving device using various interfaces and lines, by running or executing software programs and/or modules stored in memory 802, and invoking programs stored in memory 802. Code to do the following:

Receiving, by the channel, the first carrier information;

As an optional implementation manner, the performing, by the related processing on the first carrier information, sequentially obtaining the second carrier information, the original carrier information, and the third carrier information includes:

As an optional implementation manner, the processor 801 may also call program code stored in the memory 802 for performing the following operations:

As an optional implementation manner, the preset threshold is set according to a minimum distance of a constellation point and a pre-judgment of the magnitude of the received noise.

In the receiving device described in FIG. 8, the receiving device receives the channel-matched first carrier letter. Performing correlation processing on the first carrier information, sequentially obtaining second carrier information, original carrier information, and third carrier information; comparing the second carrier information with the original carrier information to determine the second carrier Information having the same location and different location as the original carrier information; extracting a first value at the same location of the first carrier information and extracting a first location on the same location of the third carrier information a second value, and determining a first maximum value of an absolute value of a difference between the first value and the second value; extracting a third value at the different position of the first carrier information and extracting the a fourth value at the different position of the third carrier information, and determining a second maximum value of the absolute value of the difference between the third value and the fourth value; determining the second maximum value Whether the difference of the first maximum value is greater than a preset threshold; if yes, determining that there is hidden information in the first carrier information. It can be seen that, in the embodiment of the present invention, the receiving device may perform related processing on the received first carrier information, and sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and further, the first carrier information and the second The carrier information, the original carrier information, and the third carrier information are compared and analyzed to determine that the secret information exists in the first carrier information, so that the secret information can be accurately detected.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided herein, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

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

In addition, each functional unit in various embodiments of the present invention may be integrated in one processing unit. It is also possible that each unit physically exists alone, or two or more units may be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the 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 standalone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a memory. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing memory includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like, which can store program codes.

A person skilled in the art can understand that all or part of the steps of the foregoing embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable memory, and the memory can include: a flash drive , read-only memory (English: Read-Only Memory, referred to as: ROM), random accessor (English: Random Access Memory, referred to as: RAM), disk or CD.

The information detection method, device and receiving device based on packet energy difference disclosed in the embodiment of the present invention are described in detail. The principle and implementation manner of the present invention are described in the following examples. The description is only for helping to understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The contents of this specification are not to be construed as limiting the invention.

Claims

An information detection method based on packet energy difference, characterized in that it comprises:

Receiving, by the channel, the first carrier information;

Performing related processing on the first carrier information, and sequentially obtaining second carrier information, original carrier information, and third carrier information;

Comparing the second carrier information with the original carrier information to determine a location and a different location of the second carrier information and the original carrier information;

Extracting a first value at the same location of the first carrier information and extracting a second value at the same location of the third carrier information, and determining the first value and the second The first maximum value of the absolute value of the difference of the values;

Extracting a third value at the different location of the first carrier information and extracting a fourth value at the different location of the third carrier information, and determining the third value and the fourth a second maximum value of the absolute value of the difference of the values;

Determining whether a difference between the second maximum value and the first maximum value is greater than a preset threshold;

If yes, it is determined that the secret information exists in the first carrier information.
The method according to claim 1, wherein the performing the correlation processing on the first carrier information, and sequentially obtaining the second carrier information, the original carrier information, and the third carrier information comprises:

Demodulating the first carrier information to obtain second carrier information;

Decoding and re-encoding the second carrier information to obtain original carrier information;

The original carrier information is remodulated to obtain third carrier information.
The method of claim 2, wherein the method further comprises:

If the difference between the second maximum value and the first maximum value is less than or equal to the preset threshold, determining that there is no secret information in the first carrier information.
The method according to any one of claims 1 to 3, characterized in that the preset threshold is set according to a minimum distance of a constellation point and a pre-judgment of the magnitude of the received noise.
An information detecting apparatus, comprising:

a receiving unit, configured to receive the first carrier information that is matched by the channel;

a processing unit, configured to perform correlation processing on the first carrier information, and sequentially obtain second carrier information, original carrier information, and third carrier information;

a comparison determining unit, configured to compare the second carrier information with the original carrier information to determine a location and a different location of the second carrier information and the original carrier information;

An extraction determining unit, configured to extract a first value on the same location of the first carrier information and extract a second value on the same location of the third carrier information, and determine the first a first maximum value of an absolute value of a difference between the value and the second value;

The extraction determining unit is further configured to extract a third value at the different position of the first carrier information and extract a fourth value at the different position of the third carrier information, and determine a second maximum value of the absolute value of the difference between the third value and the fourth value;

a determining unit, configured to determine whether a difference between the second maximum value and the first maximum value is greater than a preset threshold;

The determining unit is configured to determine that the secret information exists in the first carrier information when the determining unit determines that the difference between the second maximum value and the first maximum value is greater than the preset threshold.
The information detecting apparatus according to claim 5, wherein the processing unit performs correlation 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 re-encoding the second carrier information to obtain original carrier information;

The original carrier information is remodulated to obtain third carrier information.
The information detecting apparatus according to claim 6, wherein the determining unit is further configured to: when the determining unit determines that a difference between the second maximum value and the first maximum value is less than or equal to the When the threshold is preset, it is determined that there is no secret information in the first carrier information.
The information detecting apparatus according to any one of claims 5 to 7, wherein the preset threshold is set based on a minimum distance of a constellation point and a pre-judgment of the magnitude of the received noise.
A receiving device, characterized in that the receiving device comprises a processor and a memory, the processor executing the computer program stored in the memory to implement the information detecting method according to any one of claims 1 to 4.
A computer readable storage medium, characterized in that the computer readable storage medium stores at least one instruction, the at least one instruction being executed by a processor to implement the information detection according to any one of claims 1 to method.