WO2019095175A1 - Procédé et appareil de détection d'informations sur la base d'une distance de points de constellation, et dispositif de réception - Google Patents

Procédé et appareil de détection d'informations sur la base d'une distance de points de constellation, et dispositif de réception Download PDF

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Publication number
WO2019095175A1
WO2019095175A1 PCT/CN2017/111216 CN2017111216W WO2019095175A1 WO 2019095175 A1 WO2019095175 A1 WO 2019095175A1 CN 2017111216 W CN2017111216 W CN 2017111216W WO 2019095175 A1 WO2019095175 A1 WO 2019095175A1
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WIPO (PCT)
Prior art keywords
carrier information
information
distance
carrier
original
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PCT/CN2017/111216
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English (en)
Chinese (zh)
Inventor
谢宁
谭杰
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深圳大学
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Priority to PCT/CN2017/111216 priority Critical patent/WO2019095175A1/fr
Publication of WO2019095175A1 publication Critical patent/WO2019095175A1/fr

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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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an information detection method, apparatus, and receiving device based on constellation point distance.
  • 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.
  • 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.
  • these methods are computationally intensive.
  • the test results are not precise enough and have limitations.
  • the embodiment of the invention discloses a method, a device and a receiving device for detecting information based on the distance of a constellation point, which can accurately detect the secret information.
  • a first aspect of the embodiments of the present invention discloses a method for detecting information based on a constellation point distance, including:
  • 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:
  • the original carrier information is remodulated to obtain third carrier information.
  • the performing, by the related processing on the second carrier information, obtaining the fourth carrier information includes:
  • the method further includes:
  • the first distance is less than or equal to the second distance, determining that there is no secret information in the first carrier information.
  • 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;
  • the processing unit is further configured to perform correlation processing on the second carrier information to obtain fourth carrier information.
  • Determining a unit determining a first distance between the corresponding points, and a second distance between adjacent constellation points on the constellation;
  • a determining unit whether the first distance is greater than a second distance
  • the determining unit is configured to determine that the secret information exists in the first carrier information when the determining unit determines that the first distance is greater than the second distance.
  • the processing unit Performing related processing on the first carrier information, and sequentially obtaining the second carrier information, the original carrier information, and the third carrier information includes:
  • the original carrier information is remodulated to obtain third carrier information.
  • the processing unit is further configured to perform related processing on the second carrier information, and obtaining the fourth carrier information includes:
  • the determining unit is further configured to: when the determining unit determines that the first distance is less than or equal to the second distance, determine There is no hidden information in the first carrier information.
  • 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 constellation point according to any one of the above aspects. Distance information detection method.
  • a computer readable storage medium storing at least one instruction, the at least one instruction being executed by a processor, implementing the constellation point distance based information detecting method according to any one of the above first aspects .
  • the embodiment of the invention has the following beneficial effects:
  • 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;
  • the second carrier information is subjected to correlation processing to obtain fourth carrier information;
  • the third carrier information and the fourth carrier information are compared to determine a point corresponding to the third carrier information and the fourth carrier information;
  • the receiving device may perform related processing on the received first carrier information, sequentially obtain the second carrier information, the original carrier information, and the third carrier information, and the receiving device may perform related on the second carrier information. Processing, obtaining fourth carrier information, and further comparing the fourth carrier information and the third carrier information The present invention analyzes and judges to determine that there is secret information in the first carrier information, so that the secret information can be accurately detected.
  • FIG. 1 is a diagram of a communication model for replacing steganography disclosed in an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method for detecting information based on constellation point distance according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an information detecting 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.
  • the embodiment of the invention discloses a method, a device and a receiving device for detecting information based on the distance of a constellation point, which can accurately detect the secret information.
  • the details are described below in conjunction with the drawings.
  • FIG. 1 is a diagram of a communication model for replacing steganography disclosed in an embodiment of the present invention.
  • 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
  • the base station 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.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • 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).
  • 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.
  • 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
  • the base station 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.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station can be a base station in GSM or CDMA (BTS, Base Transceiver)
  • the station may be a base station (NodeB) in WCDMA, or may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, which is not limited in the embodiment of the present invention.
  • 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).
  • 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.
  • 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.
  • 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.
  • the secret information can randomly replace some positions of the carrier information to hide the information.
  • the carrier information 0 can be replaced by the secret information 1
  • the carrier information 1 can be replaced by the secret information 0, after BPSK is - 1 changes to 1, 1 changes to -1.
  • 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.
  • FIG. 2 is a schematic flowchart diagram of a method for detecting information based on constellation point distance 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:
  • Step 201 The receiving device receives the first carrier information that is matched by the channel.
  • Replace steganography which means that the original information is embedded in the secret information after channel coding, and the secret information is embedded. Directly replace the original part of the information to achieve information hiding purposes.
  • 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.
  • Y is the carrier information after the channel H is multiplied
  • conj(H) is the conjugate of H
  • 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.
  • 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:
  • the original carrier information is remodulated to obtain third 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
  • the third carrier information does not include secret information.
  • Step 203 The receiving device performs related processing on the second carrier information to obtain fourth carrier information.
  • the receiving device performs remodulation processing on the second carrier information to obtain fourth carrier information.
  • the modulation method is digital modulation.
  • the hidden information that may be hidden in the second carrier information may be erased, so that the second carrier information is remodulated to obtain the fourth carrier information.
  • the second carrier information is the same hidden information that may be hidden in the fourth carrier information.
  • Step 204 The receiving device compares the third carrier information with the fourth carrier information to determine a point corresponding to the third carrier information and the fourth carrier information.
  • the third carrier information is obtained by digitally modulating the original carrier information
  • 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.
  • the fourth carrier information is obtained by digitally modulating the second carrier information, and the second carrier information is demodulated by the first carrier information. Since the first carrier information is affected by noise, the noise will be jittered near the constellation point of the first carrier information, so a misjudgment will occur on the constellation point of the fourth carrier information. However, after the information is replaced, the off-constellation point will exceed the noise. Jitter.
  • Step 205 Determine a first distance between the corresponding points, and a second distance between adjacent constellation points on the constellation.
  • the third carrier information and the fourth carrier information corresponding point are determined, the corresponding distance is determined, the first distance between the corresponding points is determined, and the second distance between the adjacent constellation points on the constellation is determined.
  • the distance calculation formula is as follows:
  • Y3 is the coordinate of the corresponding point on the third carrier information constellation diagram
  • Y4 is the coordinate of the corresponding point on the fourth carrier information constellation diagram
  • Y is the coordinate corresponding to the first distance
  • 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 secret information may be included at different corresponding points of the constellation points.
  • the presence of noise causes the vicinity of the constellation point of the first carrier information to be dithered, so misjudgment occurs at the constellation point of the fourth carrier information.
  • the off-constellation point exceeds the jitter of the noise. Therefore, it is possible to determine whether there is hidden information according to the distance between corresponding points.
  • the noise is random Gaussian noise, so the presence of noise makes the vicinity of the constellation point of the first carrier information jitter.
  • Step 206 The receiving device determines whether the first distance is greater than the second distance. If yes, step 207 is performed, and if no, step 208 is performed.
  • the noise since the first carrier information is affected by noise, the noise will be jittered near the constellation point of the first carrier information, so a misjudgment will occur on the constellation point of the fourth carrier information, however, after the information is replaced, the constellation is deviated. The point will exceed the jitter of the noise, so it can be based on the first point between the corresponding points The distance and the second distance between adjacent constellation points are used to judge the secret information.
  • the digital modulation can be QPSK, PSK, QAM.
  • 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.
  • FIG. 3 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. 3 may be used to perform some or all of the steps in the information detecting method described in FIG. 2 .
  • 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;
  • the processing unit 102 is further configured to perform correlation processing on the second carrier information to obtain fourth carrier information.
  • the comparison determining unit 103 the third carrier information and the fourth carrier information to determine a point corresponding to the third carrier information and the fourth carrier information;
  • Determining unit 104 determining a first distance between the corresponding points, and a second distance between adjacent constellation points on the constellation;
  • a determining unit 105 whether the first distance is greater than a second distance
  • the determining unit 106 is configured to determine that the secret information exists in the first carrier information when the determining unit determines that the first distance is greater than the second distance.
  • 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:
  • the original carrier information is remodulated to obtain third carrier information.
  • the processing unit 102 is further configured to perform related processing on the second carrier information, where Obtaining the fourth carrier information includes:
  • the determining unit 106 is further configured to: when the determining unit 105 is further configured to: when the determining unit determines that the first distance is less than or equal to the second distance, determine the first carrier information There is no hidden information in it.
  • the information detecting apparatus described in FIG. 3 is configured to receive the first carrier information after the channel matching, 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; And performing correlation processing on the second carrier information to obtain fourth carrier information; the third carrier information and the fourth carrier information to determine a point corresponding to the third carrier information and the fourth carrier information; Determining a first distance between corresponding points and a second distance between adjacent constellation points on the constellation; determining whether the first distance is greater than a second distance; and determining that the first distance is greater than the second distance, determining the first carrier There is hidden information in the 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.
  • 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.
  • 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.
  • 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 respectively connected to the communication bus.
  • the memory 802 may be a high speed RAM memory or a non-volatile memory.
  • the structure of the receiving device shown in FIG. 4 does not constitute a limitation of the present invention, and it may be a bus-shaped structure or a star-shaped structure, and may include more or less than that shown in FIG. 4. Parts, or combine some parts, or different parts.
  • the processor 801 is a control center of the receiving device, and may be a central processing unit (CPU).
  • the processor 801 connects various parts of the entire receiving device by using various interfaces and lines, and is stored in the memory 802 by running or executing.
  • 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:
  • the original carrier information is remodulated to obtain third carrier information.
  • the performing, by the related processing on the second carrier information, obtaining the fourth carrier information includes:
  • processor 801 may also call program code stored in the memory 802 for performing the following operations:
  • the first distance is less than or equal to the second distance, determining that there is no secret information in the first carrier information.
  • the receiving device receives the channel-matched first carrier information; performs correlation processing on the first carrier information, and sequentially obtains second carrier information, original carrier information, and third carrier information; Performing correlation processing on the second carrier information to obtain fourth carrier information; comparing the third carrier information with the fourth carrier information to determine a point 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; determining whether the first distance is greater than a second distance; if yes, determining that there is a secret in the first carrier information information.
  • 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 disclosed apparatus may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • 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.
  • 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.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above 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.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

L'invention concerne un procédé de détection d'informations sur la base d'une distance de points de constellation. Le procédé comprend : la réception de premières informations de porteuse après la mise en correspondance de canaux; la réalisation d'un traitement associé sur les premières informations de porteuse pour obtenir des deuxièmes informations de porteuse, des informations de porteuse d'origine et des troisièmes informations de porteuse en séquence; la réalisation d'un traitement associé sur les deuxièmes informations de porteuse pour obtenir des quatrièmes informations de porteuse; la comparaison des troisièmes informations de porteuse avec les quatrièmes informations de porteuse, de manière à déterminer des points correspondants des troisièmes informations de porteuse et des quatrièmes informations de porteuse; la détermination d'une première distance entre les points correspondants, et d'une seconde distance entre des points de constellation adjacents sur un diagramme de constellations; la détermination du fait que la première distance est supérieure ou non à la seconde distance; et si tel est le cas, la détermination du fait que des informations cachées existent dans les premières informations de porteuse. Au moyen de la présente invention, il est possible de détecter avec précision des informations cachées.
PCT/CN2017/111216 2017-11-15 2017-11-15 Procédé et appareil de détection d'informations sur la base d'une distance de points de constellation, et dispositif de réception WO2019095175A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101465934A (zh) * 2007-12-20 2009-06-24 佳能株式会社 星座图检测
CN102355359A (zh) * 2011-07-15 2012-02-15 华南理工大学 在调制星座图中隐藏秘信息的方法
US20150286873A1 (en) * 2014-04-03 2015-10-08 Bruce L. Davis Smartphone-based methods and systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101465934A (zh) * 2007-12-20 2009-06-24 佳能株式会社 星座图检测
CN102355359A (zh) * 2011-07-15 2012-02-15 华南理工大学 在调制星座图中隐藏秘信息的方法
US20150286873A1 (en) * 2014-04-03 2015-10-08 Bruce L. Davis Smartphone-based methods and systems

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