WO2021261883A1 - Procédé de détection d'une caméra cachée à l'aide d'un routeur sans fil et système associé - Google Patents

Procédé de détection d'une caméra cachée à l'aide d'un routeur sans fil et système associé Download PDF

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Publication number
WO2021261883A1
WO2021261883A1 PCT/KR2021/007815 KR2021007815W WO2021261883A1 WO 2021261883 A1 WO2021261883 A1 WO 2021261883A1 KR 2021007815 W KR2021007815 W KR 2021007815W WO 2021261883 A1 WO2021261883 A1 WO 2021261883A1
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WO
WIPO (PCT)
Prior art keywords
hidden camera
terminal device
wireless router
wireless terminal
length
Prior art date
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PCT/KR2021/007815
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English (en)
Korean (ko)
Inventor
공경남
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공경남
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Publication of WO2021261883A1 publication Critical patent/WO2021261883A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/12—Detection or prevention of fraud
    • H04W12/121—Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N20/00—Machine learning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/30—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/80—Arrangements enabling lawful interception [LI]

Definitions

  • the present invention relates to a hidden camera detection technology, and more particularly, to a method and system for detecting a hidden camera using a wireless router capable of detecting a hidden camera using the wireless router.
  • a method of using a separate detection device has emerged.
  • a detection device that utilizes a traffic pattern for a radio signal emitted from a hidden camera can be used, but there is a difficulty in using expensive equipment.
  • the number of cases of detecting a hidden camera using a portable terminal device without a separate detection device is increasing, there is a difficulty in that the efficiency of the detection ability is lowered because it is greatly influenced by the surrounding environment.
  • Embodiments of the present invention provide a method and system for detecting a hidden camera using a wireless router capable of detecting a hidden camera by analyzing a radio wave signal of a nearby wireless terminal device that responds to a signal emitted by the wireless router.
  • embodiments of the present invention provide a method and system for detecting a hidden camera using a wireless router to improve the detection rate of the hidden camera by repeatedly learning the radio signal of a nearby wireless terminal device through artificial intelligence.
  • embodiments of the present invention provide a method for detecting a hidden camera using a wireless router capable of blocking communication with the terminal through the wireless router or providing a real-time notification to an administrator when a nearby wireless terminal device is determined to be a hidden camera, and a method thereof provide the system.
  • the method for detecting a hidden camera using a wireless router comprises the steps of: transmitting, by at least one wireless router, a detection signal for detecting a hidden camera to a nearby wireless terminal device;
  • the method may include receiving a response signal as a response and determining whether the wireless terminal device is the hidden camera by analyzing the length of data packets constituting the response signal.
  • the data packet of the response signal may include at least one of MAC address information, signal strength information, traffic information, and access time information.
  • a ratio of data packets having a first length among data packets constituting the response signal exceeds a predetermined first threshold or a second
  • the ratio of the data packets having a length exceeds the second preset threshold, it may be determined that the wireless terminal device is the hidden camera.
  • the first length may be 500 Bytes
  • the second length may be 1024 Bytes.
  • the step of detecting the hidden camera comprises the steps of: transmitting the response signal to an external server for machine learning and analyzing the length of the data packet; and the length of the data packet from the external server and receiving a control signal including control information of the wireless router according to the analysis result and the analysis result.
  • the wireless router blocks communication with the wireless terminal device. It is possible to receive the control signal including the control information.
  • the external server creates a unique identifier group for a wireless terminal device other than a camera, and checks in advance whether the unique identifier of the wireless terminal device belongs to the created unique identifier group.
  • a notification signal is output through the wireless router or a notification signal to the manager of the wireless router It may further include the step of providing in real time.
  • the detecting of the hidden camera may include measuring a distance between the wireless terminal determined to be the hidden camera and the wireless router when there is only one wireless router.
  • the step of detecting the hidden camera may include measuring the position of the wireless terminal device determined to be the hidden camera using a triangulation method when there are three wireless routers.
  • the hidden camera detection system is a wireless router that outputs a detection signal for detecting a hidden camera, receives the detection signal and transmits a response signal to the wireless router in response to the detection signal and an external server for determining whether the wireless terminal device is the hidden camera by analyzing the length of the data packet constituting the response signal.
  • the wireless router transmits the response signal to the external server, and the result of analysis on the length of the data packet from the external server and the control information of the wireless router according to the analysis result It is possible to receive a control signal comprising a.
  • a ratio of data packets having a first length among data packets constituting the response signal exceeds a predetermined first threshold or data packets having a second length.
  • the ratio exceeds the second preset threshold, it may be determined that the wireless terminal device is the hidden camera.
  • the first length may be 500 Bytes
  • the second length may be 1024 Bytes.
  • a nearby wireless terminal device when a nearby wireless terminal device is determined to be a hidden camera, communication with the terminal device through the wireless router may be blocked or a real-time notification may be provided to an administrator.
  • FIG. 1 is a block diagram illustrating a hidden camera detection system according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a header format of a data packet constituting a radio signal of a wireless terminal device according to an embodiment of the present invention.
  • FIG. 3 is an exemplary diagram illustrating a method for measuring a distance between a wireless router and a hidden camera according to an embodiment of the present invention.
  • FIG. 4 is an exemplary diagram illustrating a method of measuring a position of a hidden camera according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method for detecting a hidden camera using a wireless router according to an embodiment of the present invention.
  • 6A and 6B are graphs for comparing and analyzing data packets for a camera and a terminal device other than the camera according to an embodiment of the present invention.
  • FIG. 7 is a graph illustrating hidden camera detection performance by repeatedly learning a radio signal of a wireless terminal device according to an embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating a hidden camera detection system according to an embodiment of the present invention
  • FIG. 2 is a header of a data packet constituting a radio signal of a wireless terminal device according to an embodiment of the present invention.
  • the hidden camera detection system may include a wireless router 100 , a wireless terminal device 200 , and an external server 300 .
  • the wireless router 100 is a wireless router 100 having an access point (AP) function, and at least one may be provided in a space for detecting a hidden camera.
  • the wireless router 100 may be a Wi-Fi router capable of Wi-Fi communication with a nearby terminal.
  • the wireless router 100 may output a detection signal for detecting a hidden camera to the surroundings.
  • the detection signal may be periodically output as a general radio signal having a frequency.
  • the wireless terminal device 200 may receive a detection signal output from the wireless router 100 , and may output a response signal in response to the detection signal.
  • the response signal is a radio signal composed of data packets, and data information about the wireless terminal device 200 may be included.
  • the data packet of the response signal may include PHY and MAC header information.
  • the data packet of the response signal includes at least one of MAC address information, signal strength information, traffic information, and access time information. may include For reference, the formats of the PHY and MAC headers are as shown in FIG. 2 .
  • a plurality of wireless terminal devices 200 may be provided in a space, and at least one may receive a detection signal output from the wireless router 100 .
  • the external server 300 may analyze the response signal of the wireless terminal device 200 to determine whether the wireless terminal device 200 is a hidden camera. To this end, the wireless router 100 receives the response signal output by the wireless terminal and transmits it to the external server 300 , and the external server 300 analyzes the received response signal.
  • the external server 300 may analyze the length of the data packet constituting the response signal of the wireless terminal device 200 to determine whether it is a hidden camera.
  • the external server 300 may determine whether a hidden camera is present in consideration of the ratio of packets having a specific length among the data packets constituting the response signal.
  • the external server 300 determines that a ratio of data packets having a first length among data packets constituting a response signal exceeds a predetermined first threshold value or a ratio of data packets having a second length is preset. If the second threshold is exceeded, it may be determined that the wireless terminal device 200 is a hidden camera.
  • the first length may be 500 Bytes
  • the second length may be 1024 Bytes
  • the first threshold value may be a ratio of 20%
  • the second threshold value may be a ratio of 60%.
  • the more the response signal includes more data packets having a length of 500 bytes or 1024 bytes, the more likely the wireless terminal device 200 that outputs the response signal is a hidden camera. Conversely, it can be said that the more the response signal includes more data packets having a length other than 500 Bytes or 1024 Bytes, the less likely the wireless terminal device 200 that outputs the corresponding response signal is a hidden camera.
  • FIG. 6A in the case of a signal output from a camera terminal device (360, Haier, Ezviz, Yi, Dahua), the length of the normalized data packet of the signal is an accumulation having a length of 500 Bytes or 1024 Bytes It can be seen from the graph on the left that the ratio (CDF) is high.
  • FIG. 6B in the case of a signal output from the terminal devices 1 to 9 rather than the camera terminal device, it is shown through the graph on the right that the normalized data packet length of the signal has various lengths without a specific pattern. Able to know.
  • FIGS. 6A and 6B are graphs for comparing and analyzing data packets for a camera and a terminal device other than the camera, according to an embodiment of the present invention.
  • the external server 300 may analyze the length of the data packet by repeatedly performing artificial intelligence (AI)-based learning. Specifically, the analysis may be performed using a matching table in which a hidden camera or a terminal device other than a camera is matched according to the length of the data packet. Accordingly, the detection rate and accuracy can be improved.
  • AI artificial intelligence
  • FIG. 7 is a graph illustrating hidden camera detection performance according to iterative learning of radio signals of the wireless terminal device 200 according to an embodiment of the present invention.
  • the external server 300 may transmit to the wireless router 100 a control signal including an analysis result on the length of the data packet and control information of the wireless router 100 according to the analysis result.
  • the external server 300 controls the wireless router 100 to block communication with the wireless terminal device 200 .
  • a control signal including information may be transmitted to the wireless router 100 .
  • the external server 300 may analyze the unique information of the wireless terminal device 200 before analyzing the response signal of the wireless terminal device 200 to first determine the possibility of a hidden camera.
  • the external server 300 generates in advance a unique identifier group for the wireless terminal device 200 other than the camera, and whether the unique identifier of the wireless terminal device 200 belongs to the previously created unique identifier group. can be checked in advance. That is, before analyzing the length information of the data packet constituting the response signal of the wireless terminal device 200, the unique identifier information included in the data packet may be checked first.
  • the unique identifier of the wireless terminal device 200 belongs to a pre-created unique identifier group, it can be determined that the wireless terminal device 200 is highly likely to be a hidden camera, and the unique identifier of the wireless terminal device 200 is If the identifier does not belong to the pre-generated unique identifier group, it is determined that the possibility that the corresponding wireless terminal device 200 is a hidden camera is low, and length analysis of the data packet may not be performed. Accordingly, it is possible to select the wireless terminal device 200 corresponding to the hidden camera only by checking the unique identifier without repeatedly analyzing the data packet for each response signal of the wireless terminal device 200, thereby increasing the efficiency of the detection operation. .
  • a notification signal for notifying the danger of the hidden camera may be provided.
  • a notification signal such as a notification sound or a notification may be output through the wireless router 100, and for this purpose, the wireless router 100 has It is preferable that a speaker or a display is installed.
  • a notification signal such as a notification message or a notification phone call may be provided to the manager of the wireless router 100 in real time, and for this purpose, the manager's It is preferable that wireless communication between the terminal and the wireless router 100 is established.
  • a communication method such as Wi-Fi, ZigBee, or Bluetooth may be adopted, but is not limited thereto.
  • the wireless terminal device 200 determined to be a hidden camera it is possible to measure where the wireless terminal device 200 determined to be a hidden camera is located within a detection area, rather than only detecting the hidden camera.
  • the wireless router 100 may be provided with a distance measuring sensor such as an ultrasonic sensor, and may measure the distance r to the wireless terminal device 200 using the corresponding sensor.
  • a distance measuring sensor such as an ultrasonic sensor
  • the wireless router 100 when there are three wireless routers 100, by measuring the position of the wireless terminal device 200 determined to be a hidden camera using a triangulation method, the hidden camera around the wireless router 100 is direction can be determined.
  • the wireless router 100 may be provided with a distance measuring sensor such as a laser sensor and an angle sensor such as a gyro sensor. The position of the terminal device 200 may be measured.
  • FIG. 4 shows a method of measuring a position of a hidden camera.
  • FIG. 5 is a flowchart illustrating a method for detecting a hidden camera using the wireless router 100 according to an embodiment of the present invention.
  • At least one wireless router 100 of the present invention may transmit a detection signal for detecting a hidden camera to a nearby wireless terminal device 200 .
  • the wireless router 100 may be a Wi-Fi router capable of Wi-Fi communication with a nearby terminal, and may periodically output a detection signal.
  • the wireless router 100 of the present invention may receive a response signal in response to the detection signal from the wireless terminal device 200 .
  • the wireless terminal device 200 may receive the detection signal output by the wireless router 100 and output a response signal including data information about the device as a response to the detection signal, and the wireless router 100 may receive a response signal from the wireless terminal device 200 .
  • the wireless router 100 may transmit a response signal received from the wireless terminal device 200 to the external server 300 , and the external server 300 analyzes the received response signal.
  • the external server 300 may determine whether a hidden camera is present in consideration of the ratio of packets having a specific length among the data packets constituting the response signal.
  • the external server 300 determines that a ratio of data packets having a first length among data packets constituting a response signal exceeds a predetermined first threshold value or a ratio of data packets having a second length is preset. If the second threshold is exceeded, it may be determined that the wireless terminal device 200 is a hidden camera.
  • the first length may be 500 Bytes
  • the second length may be 1024 Bytes
  • the first threshold value may be a ratio of 20%
  • the second threshold value may be a ratio of 60%.
  • the external server 300 may repeatedly perform artificial intelligence (AI)-based learning in the process of analyzing the length of the data packet. Specifically, the analysis may be performed using a matching table in which a hidden camera or a terminal device other than a camera is matched according to the length of the data packet.
  • AI artificial intelligence
  • the external server 300 may transmit to the wireless router 100 a control signal including an analysis result on the length of the data packet and control information of the wireless router 100 according to the analysis result.
  • the external server 300 controls the wireless router 100 to block communication with the wireless terminal device 200 .
  • a control signal including information may be transmitted to the wireless router 100 .
  • the external server 300 may analyze the unique information of the wireless terminal device 200 before analyzing the response signal of the wireless terminal device 200 to first determine the possibility of a hidden camera.
  • the external server 300 generates in advance a unique identifier group for the wireless terminal device 200 other than the camera, and whether the unique identifier of the wireless terminal device 200 belongs to the previously created unique identifier group. can be checked in advance.
  • the unique identifier of the wireless terminal device 200 belongs to a pre-created unique identifier group, it can be determined that the wireless terminal device 200 is highly likely to be a hidden camera, and the unique identifier of the wireless terminal device 200 is If the identifier does not belong to the pre-generated unique identifier group, it is determined that the possibility that the corresponding wireless terminal device 200 is a hidden camera is low, and length analysis of the data packet may not be performed.
  • a notification signal for notifying the danger of the hidden camera may be provided.
  • a notification signal such as a notification sound or a notification may be output through the wireless router 100, and for this purpose, the wireless router 100 has It is preferable that a speaker or a display is installed.
  • a notification signal such as a notification message or a notification phone call may be provided to the manager of the wireless router 100 in real time.
  • the wireless terminal device 200 determined to be a hidden camera it is possible to measure where the wireless terminal device 200 determined to be a hidden camera is located within a detection area, rather than only detecting the hidden camera.
  • the hidden camera around the wireless router 100 is direction can be determined.
  • the present invention it is possible to detect a hidden camera by analyzing a radio wave signal of a nearby wireless terminal device that responds to a signal emitted by the wireless router.
  • a nearby wireless terminal device when a nearby wireless terminal device is determined to be a hidden camera, communication with the terminal device through the wireless router may be blocked or a real-time notification may be provided to an administrator.

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Abstract

Selon un mode de réalisation, la présente invention concerne un procédé de détection d'une caméra cachée à l'aide d'un routeur sans fil comprenant : une étape consistant à émettre, par au moins un routeur sans fil, un signal de détection permettant de détecter une caméra cachée à un appareil terminal sans fil à proximité ; une étape consistant à recevoir un signal de réponse en provenance de l'appareil terminal sans fil en réponse au signal de détection ; et une étape consistant à analyser la longueur d'un paquet de données formant le signal de réponse afin de déterminer si l'appareil terminal sans fil est une caméra cachée.
PCT/KR2021/007815 2020-06-23 2021-06-22 Procédé de détection d'une caméra cachée à l'aide d'un routeur sans fil et système associé WO2021261883A1 (fr)

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KR10-2020-0076685 2020-06-23
KR1020200076685A KR102215390B1 (ko) 2020-06-23 2020-06-23 무선 공유기를 이용한 몰래 카메라 탐지 방법 및 그 시스템

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Cited By (1)

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CN116017392A (zh) * 2022-12-23 2023-04-25 四川昱澄信息技术有限公司 基于互联网的硬件装置检测的隐藏摄像头发现装置及方法

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KR102215390B1 (ko) * 2020-06-23 2021-02-16 공경남 무선 공유기를 이용한 몰래 카메라 탐지 방법 및 그 시스템
KR102532210B1 (ko) * 2022-06-09 2023-05-15 채령 고정형 @(Crazy A)불법촬영카메라 탐지 배선반 시스템

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116017392A (zh) * 2022-12-23 2023-04-25 四川昱澄信息技术有限公司 基于互联网的硬件装置检测的隐藏摄像头发现装置及方法

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