Communication detector for unauthorized terminals

Abstract

To provide a communication detector for a fraudulent terminal that does not require changing a threshold value stored in a storage device for determining whether communication is taking place between the fraudulent terminal and a wearable terminal, can reduce costs, and is easy to manage. [Solution] A communication detector for an unauthorized terminal that detects whether or not communication has occurred through an examinee terminal 16, the portable detector 12 comprising an auxiliary memory device 51 provided in a main body 63 and storing a program and a threshold value, a control circuit 50 provided in the main body 63 and which reads the program and executes processing, and an alert generator 55 provided in the main body 63, the control circuit 50 performing a first process of comparing the radio wave strength between the examinee terminal 16 and the wearable terminals 17, 18 with a threshold value to determine whether or not communication has occurred between the examinee terminal 16 and the wearable terminals 17, 18, and a second process of generating an alert in the alert generator 55 when it is determined that communication has occurred between the examinee terminal 16 and the wearable terminals 17, 18.

Description

[Technical field]

[0001] The present disclosure relates to a communication detector for a malicious terminal that detects whether communication is taking place at a malicious terminal within a specific area. [Background technology]

[0002] An example of a communication detection system for an unauthorized terminal that detects communication of the unauthorized terminal in a specific area is described in Patent Document 1. The communication detection system described in Patent Document 1 has a plurality of radio wave detection devices (communication detectors) and electronic equipment. The plurality of radio wave detection devices are installed in a specific area where wireless communication in a first communication method is prohibited or restricted. Each radio wave detection device has a detection unit that detects radio waves due to wireless communication in the first communication method, a transmission unit that transmits a report signal including device identification information for uniquely identifying the radio wave detection device and the detection result of the detection unit in a second communication method, and a threshold setting unit that sets a threshold. The detection unit also has a reception unit that receives radio waves due to wireless communication in the first communication method, and a determination unit that determines that wireless communication in the first communication method is being performed if the signal strength based on the radio waves received by the reception unit is equal to or greater than the threshold.

[0003] The radio wave detection devices are arranged at either end of the examinee's desk in the examination venue. The examinee's desks are arranged in a matrix in the examination venue. The electronic devices are arranged on the examiner's desk in the examination venue. Wireless communication is possible between the electronic devices and the radio wave detection devices. When the radio wave detection device determines that an examinee is using a mobile terminal (fraudster terminal) to communicate wirelessly with the outside world using a first communication method, i.e., a cellular method, it transmits a report signal including the determination result to the electronic device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-139436 A Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present application have recognized the following problems: according to the communication detection system described in Patent Document 1, the strength of the incoming radio waves (downstream radio waves) that an unauthorized terminal receives from an external base station varies depending on factors such as the distance between the unauthorized terminal and the base station, and the judgment unit that detects the upstream radio waves emitted from the unauthorized terminal needs to change the threshold value used for judgment depending on the strength of the upstream radio waves; a radio wave detection device must be installed on each desk, increasing costs; and thresholds must be set for all radio wave detection devices, making management cumbersome.

[0006] The object of this embodiment is to provide a communication detector for a fraudulent terminal that does not require changing a threshold value stored in a memory device to determine whether communication is taking place between the fraudulent terminal and a wearable terminal, that can reduce costs, and that is easy to manage. [Means for solving the problem]

[0007] This embodiment discloses a communication detector for a fraudulent terminal that detects whether or not communication has occurred by a fraudulent terminal carried by a monitor who moves within the specific area to monitor the fraudulent, the communication detector having a main body carried by a monitor who moves within the specific area to monitor the fraudulent, a memory device provided in the main body and storing a program, and a threshold value for determining whether or not communication has occurred between the fraudulent terminal and a wearable terminal worn by the fraudulent on the body, a control circuit provided in the main body and reading the program stored in the memory device and executing processing, and an alert generator provided in the main body, wherein the control circuit performs a first process of determining whether or not communication has occurred between the fraudulent terminal and the wearable terminal by comparing the communication strength between the fraudulent terminal and the wearable terminal with the threshold value, and a second process of generating an alert in the alert generator when it is determined that communication has occurred between the fraudulent terminal and the wearable terminal. Effect of the Invention

[0008] In this embodiment, since the communication strength between the fraudulent terminal and the wearable terminal is constant, the communication detector for the fraudulent terminal does not need to change the threshold value stored in the memory unit to determine whether communication is taking place between the fraudulent terminal and the wearable terminal, the number of communication detectors for the fraudulent terminal can be reduced, thereby reducing costs, and since the threshold values ​​stored in the memory units of a large number of communication detectors do not need to be changed, the communication detectors are easily managed. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a block diagram showing an example of a communication detector, a communication detection computer, and a communication detection system for a fraudulent terminal. [Diagram 2] FIG. 2 is a plan view showing a schematic diagram of an examination hall, which is an example of a specific area. [Diagram 3] 1 is a flowchart illustrating an example of a communication management method performed in a communication detection system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (background) Technologies for detecting the communication status of mobile phone terminals have been disclosed, for example, in Japanese Patent Publication No. 2010-68461, Japanese Patent Publication No. 2010-109913, Japanese Patent Publication No. 2011-24131, etc. In these documents, at the time when the damage caused by bank transfer fraud became a social problem, a mobile phone sensing device was disclosed, which would detect radio waves emitted from a mobile phone terminal and issue a warning announcement from a built-in speaker. In particular, the cause of refund fraud was that people were guided by mobile phones to a nearby ATM (Automatic Teller Machine) corner and were also guided to perform a bank transfer operation, so if someone was talking on a mobile phone at the ATM corner, the device would detect the radio waves from the uplink CH (channel) of a mobile phone installed on the wall and issue an alert.

[0011] However, the strength and compatibility of the radio waves of the uplink CH emitted from the mobile phone terminal differs depending on the downlink radio wave environment of the mobile phone base station. For example, when the radio waves coming from the base station are weak, the strength of the radio waves of the uplink CH is strong, and conversely, when the radio waves coming from the base station are strong, the strength of the radio waves of the uplink CH is weak. Therefore, in order to continue this function, it is required to change the threshold value to an optimal one for each ATM corner in response to changes in the radio wave environment coming from the surrounding base stations. If the threshold value is not changed every time the radio wave strength changes, it will also detect radio waves from mobile phones used by passersby outside the ATM corner, resulting in a situation where the warning announcements will not stop, making it ineffective. The communication detector disclosed herein provides a technology that addresses such issues.

[0012] (Summary of this matter) In this embodiment, an example of a communication detector, a communication detection computer, and a communication detection system for a fraudulent terminal are described with reference to the drawings. As shown in FIG. 1, the communication detection system 10 is a fraudulent communication detection system that detects whether short-distance wireless communication has been performed between a fraudulent terminal and a wearable terminal. The communication detection system 10 includes a communication detection computer 11 and a portable detector 12, which is an example of a communication detector for a fraudulent terminal. Two-way communication is possible between the communication detection computer 11 and the portable detector 12. A plurality of monitors 14 can move in a specific area, for example, within an examination hall 13 shown in FIG. 2. Each of the plurality of monitors 14 carries a portable detector 12. The communication detection system 10 is a system that detects whether short-distance wireless communication, for example, radio wave communication, has been performed between an examinee terminal (fraudulent terminal) 16 carried by an examinee 15 and wearable terminals 17 and 18. The communication strength of the short-distance wireless communication between the examinee terminal 16 and the wearable terminals 17 and 18 is approximately constant. Therefore, there is no need to change the threshold value stored in the memory device of the portable detector 12 in order to determine whether or not short-range wireless communication has been performed between the examinee terminal 16 and the wearable terminals 17, 18.

[0013] (Examination venue) FIG. 2 is a plan view showing an example of an examination hall 13. The examination hall 13 is provided in a building. The examination hall 13 is a space partitioned by a first side wall 21, a second side wall 22, a third side wall 23, and a fourth side wall 24. FIG. 2 shows an example in which the first side wall 21 and the third side wall 23 are arranged in parallel, and the second side wall 22 and the fourth side wall 24 are arranged in parallel. When the examination hall 13 is viewed from directly above in a plan view, the examination hall 13 is a quadrangle, for example, a rectangle or a square. In the examination hall 13, multiple table rows A1, A2, A3, A4, A5, and A6 are arranged between the second side wall 22 and the fourth side wall 24. Each of the table rows A1, A2, A3, A4, A5, and A6 has multiple tables 25 arranged at intervals between the first side wall 21 and the third side wall 23.

[0014] And, passages 26 are provided between the adjacent table rows. The passages 26 are arranged along the second side wall 22 and the fourth side wall 24. Also, a passage 27 is provided between the first side wall 21 and the table rows A1, A2, A3, A4, A5, and A6. A passage 28 is provided between the second side wall 22 and the table row A6. Furthermore, a passage 29 is provided between the third side wall 23 and the table rows A1, A2, A3, A4, A5, and A6, and a passage 30 is provided between the fourth side wall 24 and the table row A1.

[0015] Furthermore, repeaters 31 shown in Fig. 1 are provided at different locations in the examination venue 13, for example, at the four corners of the examination venue 13. The repeaters 31 are short-distance wireless repeaters, and include, for example, a Wi-Fi (registered trademark) access point, a beacon, etc. A Wi-Fi access point transmits and receives radio signals conforming to the wireless LAN standard. A beacon transmits and receives short-distance wireless radio signals, for example, radio signals conforming to the Bluetooth (registered trademark) standard.

[0016] (Candidate) Since examinees 15 are restricted from bringing electronic devices into the examination venue 13, they are required to turn off the power to the electronic devices and store them in their bags. The electronic devices carried by examinees 15 include examinee terminal 16, wearable terminals 17, 18, etc. Wearable terminals 17, 18 are communication devices capable of short-range wireless communication with examinee terminal 16. Wearable terminals 17, 18 may be either worn on the body of examinee 15 or placed on table 25. Examinee terminal 16 includes mobile phone, smartphone, tablet terminal, etc. Examinee terminal 16 is a computer having a control circuit, a display unit, an operation unit, a communication device, a storage device, etc.

[0017] The communication device is capable of Wi-Fi communication with the repeater 31. The memory device stores non-temporary programs, non-temporary applications, various information and data that are read by the control circuit. The display unit is, for example, a display, and displays characters, videos, images, etc. The operation unit is operated by the examinee 15. The control circuit performs various processes, judgments, controls, etc. according to the non-temporary programs, non-temporary applications, various information and data stored in the memory device, the operation contents of the operation unit, etc., and processes the display contents of the display unit and the input and output signals of the communication device.

[0018] Wearable terminal 17 is an electronic device capable of mutual communication with repeater 31, and includes, for example, a watch with a camera, a ring with a camera, a necklace with a camera, a pendant with a camera, a pen with a camera, etc. Wearable terminal 17 is controlled by examinee terminal 16. Wearable terminal 17 can convert images captured by a camera into radio signals and send them to examinee terminal 16.

[0019] The wearable terminal 18 is an electronic device capable of mutual communication with the examinee terminal 16 without the use of a repeater 31. The wearable terminal 18 is controlled by the examinee terminal 16. The wearable terminal 18 includes, for example, an audio earphone that outputs audio. The wearable terminals 17, 18 are devices that can be worn on the body of the examinee 15. The examinee terminal 16 can also mutually communicate with the helper terminal 33 via a base station 32 installed outside the examination venue 13. The helper terminal 33 is a computer operated by a helper outside the examination venue 13.

[0020] Therefore, examinee 15 can take pictures of the exam questions with a camera included in wearable terminal 17 and send the video to helper terminal 33 via base station 32. The helper can send answers to the exam questions, such as videos, images, text, and audio, from helper terminal 33 to examinee terminal 16 via base station 32. Examinee 15 can operate examinee terminal 16 to perform fraudulent acts such as visually checking the answers or listening to the audio of the answers through earphones of wearable terminal 18.

[0021] (Communication Detection Computer) The communication detection computer 11 is operated by the examination administrator. The communication detection computer 11 is a computer equipped with a control circuit 40, an auxiliary memory device 41, a communication device 42, an operation unit 43, etc. The communication detection computer 11 may be in any form, such as a server, a workstation, a mainframe, or a supercomputer. The communication detection computer 11 may also be either a single-type computer or a distributed type computer. The communication device 42 is a wireless communication device that receives and transmits radio waves, electricity, or light to perform two-way communication with the portable detector 12 via a network.

[0022] The auxiliary storage device 41 stores non-transient applications, non-transient programs, various types of information and data, etc. The various types of information and data include information about the examination venue 13 and examinee information. The information about the examination venue 13 includes a schematic diagram of the examination venue 13 viewed from directly above, the number of multiple table rows arranged in the examination venue 13, the position of each table row, the number of tables 25 in each table row and the position of each table 25, a table identification number assigned to each table 25, etc. The table identification number is different for each table 25, and each table 25 can be identified by the table identification number.

[0023] The examinee information also includes the examinee number and name of each examinee 15 seated at each table 25 in each table row. The examinee number is different for each examinee 15, allowing each examinee 15 to be identified. The examinee information for each examinee 15 is associated with the identification number assigned to each table 25. Therefore, even if multiple examinees 15 are seated in chairs corresponding to the same table 25, each table 25 and examinee 15 can be identified. The operation unit 43 is operated by the examination administrator. The examination administrator can operate the operation unit 43 to update, change, correct, etc. the information on the examination venue 13 and the examinee information.

[0024] The control circuit 40 includes an arithmetic processing circuit, a main storage device, an input port, an output port, etc. The control circuit 40 can communicate with an operation unit 43, an auxiliary storage device 41, and a communication device 42. The control circuit 40 reads non-transient applications, non-transient programs, etc. stored in the auxiliary storage device 41 to perform various processes, such as judgment, comparison, and control, and stores various process results in the auxiliary storage device 41. Various information and data are accumulated in the auxiliary storage device 41.

[0025] In order to perform various processes, the control circuit 40 comprises an information processing section 44 and a repeater control section 45. The information processing section 44 processes information on the examination venue 13, examinee information, information acquired from the portable detector 12, information to be sent to the portable detector 12, and the like.

[0026] (Portable detector) The portable detector 12 is configured to have a size and weight such that each monitor 14 can carry it and move, i.e., walk, within the examination venue 13. The portable detector 12 has a structure that allows it to be attached to and detached from a part of the body of the monitor 14, such as a pocket or belt. The portable detector 12 is a computer equipped with a main body 63, a control circuit 50, an auxiliary storage device 51, a communication device 52, an operation unit 53, an antenna 54, an alert generator 55, a power supply 56, and the like. The main body 63 is a casing made of synthetic resin or metal, and the control circuit 50, the auxiliary storage device 51, the communication device 52, the operation unit 53, the antenna 54, the alert generator 55, and the power supply 56 are provided in the main body 63.

[0027] The communication device 52 is a wireless communication device that receives and transmits radio waves, electricity, or light, and performs two-way communication with the communication detection computer 11 either via the repeater 31 or without the repeater 31. The auxiliary storage device 51 stores non-transient applications, non-transient programs, various information and data, etc. The various information and data stored in the auxiliary storage device 51 include information and data obtained from the communication detection computer 11, information and data detected by the portable detector 12, and information and data stored in advance without being obtained from the communication detection computer 11.

[0028] The operation unit 53 is operated by the monitor 14. When the monitor 14 operates the operation unit 53, the monitor 14 can set a threshold value to be stored in the auxiliary storage device 51. The threshold value is a reference value used to determine whether or not the portable detector 12 has received a radio signal. The portable detector 12 can also execute a process of storing a threshold value obtained from the communication detection computer 11 in the auxiliary storage device 51. The antenna 54 is connected to the control circuit 50, and can receive upstream radio signals and downstream radio signals between the examinee terminal 16 and the wearable terminals 17, 18. The upstream radio signals are radio signals sent from the wearable terminals 17, 18 to the examinee terminal 16. The downstream radio signals are radio signals sent from the examinee terminal 16 to the wearable terminals 17, 18.

[0029] The control circuit 50 includes an arithmetic processing circuit, a main storage device, an input port, an output port, etc. The control circuit 50 can communicate with the operation unit 53, the auxiliary storage device 51, the alert generator 55, and the communication device 52. The control circuit 50 reads and starts non-transient applications, non-transient programs, etc. stored in the auxiliary storage device 51, and performs various processes, such as judgment, comparison, and control, based on the thresholds stored in the auxiliary storage device 51, the operation contents of the operation unit 53, the radio signal received by the antenna 54, the information and data acquired from the communication detection computer 11, etc., and stores the various processing results in the auxiliary storage device 51.

[0030] The control circuit 50 can detect the presence or absence of at least one of the radio signal (downstream) transmitted from the examinee terminal 16 to the wearable terminals 17, 18 and the radio signal (upstream) received by the examinee terminal 16 from the wearable terminals 17, 18. The control circuit 50 can also determine whether the strength of the actual detected radio signal exceeds a threshold stored in the auxiliary storage device 51. Furthermore, the control circuit 50 controls the alert generator 55. The control circuit 50 can constantly send information and data, including the results of the processing, control, and judgments it has performed, to the communication detection computer 11.

[0031] The control circuit 50 comprises an information processing section 57, a radio signal processing section 58, and an alert control section 62 in order to perform various processes, controls, judgments, etc. The information processing section 57 processes information on the examination venue 13, examinee information, etc. The radio signal processing section 58 processes radio signals received by the antenna 54. The alert control section 62 causes the alert generator 55 to generate an alert when communication by radio signals is performed between the examinee terminal 16 and the wearable terminals 17, 18.

[0032] The alert generator 55 includes a display unit 59, a vibration motor 60, an earphone 61, and the like. The display unit includes a display, a light-emitting diode (LED) lamp, and the like. The display can display information and data of the examination venue 13, commands obtained from the communication detection computer 11, and the like. The vibration motor 60 is an electric motor that vibrates the main body 63 when power is supplied. The earphone 61 is connected to the communication device 52 wirelessly or by wire. The earphone 61 is worn on the ear of the monitor 14. The earphone 61 outputs a sound corresponding to a signal output from the communication device 52. The earphone 61 may also be a bone conduction earphone with a vibration function. The power source 56 is a battery that supplies power to electronic components mounted on the main body 63, such as the vibration motor 60 and the display unit 59. The battery is a secondary battery that can be charged and discharged.

[0033] (Communication detection method) The flowchart in Fig. 3 is an example of a communication detection method executed by the communication detection system 10. In step S10, the communication detection computer 11 sends various information, data, control signals, etc. to the portable detector 12. In step S10, the communication detection computer 11 sends, for example, information on the examination venue 13 and examinee information to the portable detector 12. In addition, in step S10, the communication detection computer 11 can obtain and process various information, data, etc. from the portable detector 12. In step S10, the communication detection computer 11 obtains and processes position information of the monitors 14, for example, from each portable detector 12, and stores the position information of each monitor 14 in the auxiliary storage device 41. In addition, the communication detection computer 11 can always perform the process of step S10.

[0034] The position information of each monitor 14 includes information for identifying each monitor 14 carrying a portable detector 12 in the examination hall 13 shown in FIG. 2, the current position of each monitor 14, and the movement route of each monitor 14. The information for identifying each monitor 14 includes the number of monitors 14 in the examination hall 13, an identification code for identifying each monitor 14, an identification code for identifying the portable detector 12 carried by each monitor 14, and the like. The current position of each monitor 14 is the position where each monitor 14 is located in the examination hall 13. The current position of each monitor 14 includes, for example, which of the aisles 26 between the table rows A1, A2, A3, A4, A5, and A6 each monitor 14 is located in, which of the aisles 27, 28, 29, and 30 each monitor 14 is located in, and between which tables 25 each monitor 14 is located, and the like. The movement route of each observer 14 is determined from the movement history of the current position of each observer 14 .

[0035] The movement path of the monitor 14 means between which rows of tables the monitor 14 moved, which aisle the monitor 14 moved through, and in which direction the monitor 14 moved. The movement directions of the monitor 14 include a first direction B1 in which the monitor 14 moves from the first side wall 21 toward the third side wall 23, a second direction B2 in which the monitor 14 moves from the third side wall 23 toward the first side wall 21, a third direction B3 in which the monitor 14 moves from the second side wall 22 toward the fourth side wall 24, and a fourth direction B4 in which the monitor 14 moves from the fourth side wall 24 toward the second side wall 22.

[0036] In step S20, the supervisor 14 operates the portable detector 12 to set a threshold value, and stores the set threshold value in the auxiliary storage device 51. The portable detector 12 also sends the threshold value to the communication detection computer 11. The communication detection computer 11 stores the acquired threshold value in the auxiliary storage device 41. The threshold value is the radio wave strength of the wireless signal (dBm: decibels relative to a milliwatt), and is a reference value for determining whether or not communication is being performed between the examinee terminal 16 and the wearable terminals 17 and 18. For example, if the frequency of the radio signal is 2.4 GHz, the threshold value can be set to "-65 dBm," and if the frequency of the radio signal is 5.0 GHz, the threshold value can be set to "-60 dBm." After performing the operation in step S20, the supervisor 14 moves, i.e., walks, in the examination hall while carrying the portable detector.

[0037] In step S21, the portable detector 12 obtains various information, data, control signals, etc. from the communication detection computer 11. In step S21, the portable detector 12 obtains, for example, information on the examination venue 13 and examinee information from the communication detection computer 11, processes the information, and stores the information in the auxiliary storage device 51. In step S21, the portable detector 12 sends various information, data, etc. to the communication detection computer 11. In step S21, the portable detector 12 generates position information of the monitor 14, for example, while the examination is being taken, stores the generated position information in the auxiliary storage device 51, and sends it to the communication detection computer 11. It should be noted that the portable detector 12 can constantly execute the process of step S21.

[0038] The current location included in the location information of the monitor 14 can be determined based on, for example, the strength of the radio signals received by the portable detector 12 from the multiple access points included in the repeater 31, the difference in the arrival time of the radio signals from each access point to the portable detector 12, etc. Also, the current location of the monitor 14 can be determined based on the strength of the signals received by the portable detector 12 from the multiple beacons included in the repeater 31, the difference in the arrival time of the signals from each beacon to the portable detector 12, etc.

[0039] In step S22, the portable detector 12 determines whether or not a radio signal has been detected. If the portable detector 12 determines Yes in step S22, in step S23, the portable detector 12 outputs the fact that a radio signal has been detected and its position on the display unit 59. The detection of the radio signal is indicated by, for example, lighting up a light-emitting diode lamp included in the display unit 59.

[0040] In addition, in step S24, the portable detector 12 determines whether or not a radio signal is detected when the monitor 14 walks along each of the aisles 26, 30 on either side of the table 25 located at the ○th position from the first side wall 21 in any one of the table rows, for example, table row A1, along at least one of the first direction B1 and the second direction B2.

[0041] Here, it does not matter whether the supervisors 14 who walked along the aisles 26, 30 on either side of a given table 25 are the same person or different people. The portable detector 12 makes the judgment in step S24 based on the movement history of the supervisor 14. The judgment in step S24 makes it possible to identify a single table 25 at which an examinee 15 who is communicating with the examinee terminal 16 is located. If the portable detector 12 judges Yes in step S24, it judges in step S25 whether the strength of the detected radio signal exceeds a threshold, that is, whether or not communication is occurring by the examinee terminal 16. The threshold used in the judgment in step S25 is the one set in step S20.

[0042] If the portable detector 12 judges Yes in step S22, it can also proceed to step S25 without executing step S24. Furthermore, if the communication detection computer 11 acquires information for which it judges Yes in step S22 from a portable detector 12 located in an aisle on one side of any table 25 in step S10, it can also send a command signal to the other portable detectors 12, saying "Please walk in the aisle on the opposite side of the table 25." The monitor 14 carrying the portable detector 12 that receives this command signal can walk in the "aisle on the opposite side of the table 25" according to the command.

[0043] When the portable detector 12 judges "Yes" in step S25, that is, when it judges that communication has been performed at the examinee terminal 16, it generates an alert in step S26. The alert generated by the portable detector 12 may be any of the following: blinking of the light-emitting diode lamp, lighting of the light-emitting diode lamp, vibration of the main body of the portable detector 12 by the vibration motor 60, vibration of the bone motor earphone included in the earphone 61, audio output from the earphone 61, etc. When the alert generated by the portable detector 12 is lighting or blinking of the light-emitting diode lamp, the number of light-emitting diode lamps that are turned on may be varied according to the radio wave signal strength. For example, the number of light-emitting diode lamps that are turned on can be increased as the detected radio wave strength increases.

[0044] The supervisor 14 can identify the examinee 15 who communicated the radio signal with the examinee terminal 16 by bringing the portable detector 12 close to the body, bag, etc. of the examinee 15 sitting at the table 25 nearest to the current position where the alert generator 55 issued the alert. When the portable detector 12 identifies the examinee 15, it sends information about the identified examinee 15, i.e., the fraudulent examinee information, to the communication detection computer 11 and the process proceeds to step S22. The fraudulent examinee information is the examinee number and name.

[0045] If the portable detector 12 determines No in step S22, or No in step S24, or No in step S25, that is, if it determines that no communication is taking place at the examinee terminal 16, it proceeds to step S22. The communication detection computer 11 obtains and processes the fraud information from the portable detector 12 in step S11, and stores it in the auxiliary storage device 41.

[0046] (Application example) Application examples of the communication detection method performed in the communication detection system 10 include the following. For example, the communication detection computer 11 can also make the decisions in steps S22, S24, and S25 of Fig. 3. To be more specific, if the portable detector 12 judges Yes in step S22, the portable detector 12 sends information indicating that fact, as well as other information, to the communication detection computer 11. Then, in step S10 of Fig. 3, the control circuit 40 of the communication detection computer 11 obtains information from the portable detector 12 that "radio communication has been carried out at the examinee terminal 16."

[0047] Then, after step S10, the communication detection computer 11 makes the decisions in steps S24 and S25, and if the communication detection computer 11 determines Yes in step S25, the communication detection computer 11 again sends a control signal to generate an alert to the portable detector 12 in step S10. The portable detector 12 then executes the process of step S26. Note that if multiple portable detectors 12 receive radio signals in the aisles on both sides of the table 25, the communication detection computer 11 sends a control signal to each of the multiple portable detectors 12 in step S26.

[0048] (Effects of the embodiment) The communication radio waves between the base station 32 and the examinee terminal 16, specifically the strength of the arriving radio waves (downstream), vary depending on the environment, for example the distance between the base station 32 and the examinee terminal 16, the presence or absence of obstacles between the examinee terminal 16 and the base station 32, the number of obstacles, the density of the obstacles, the height of the obstacles, the weather, and other disturbances. For this reason, if the examinee terminal 16 tries to determine whether or not communication is occurring between the examinee terminal 16 and the base station 32 by comparing the actual strength of the arriving radio waves received by the examinee terminal 16 from the base station 32 with a threshold, the threshold must be changed according to the environment, and the determination of whether or not communication is occurring between the examinee terminal 16 and the base station 32 may be inaccurate.

[0049] In contrast, the portable detector 12 of this embodiment compares the strength of the radio wave communication between the examinee terminal 16 and the wearable terminals 17, 18 with a threshold stored in the auxiliary storage device 51 to determine whether communication is occurring between the examinee terminal 16 and the wearable terminals 17, 18. The examinee terminal 16 and the wearable terminals 17, 18 are present in the same examination venue 13 and perform short-distance communication. Therefore, the strength of the communication radio wave between the examinee terminal 16 and the wearable terminals 17, 18 is approximately constant. Therefore, it is not necessary to change the threshold stored in the auxiliary storage device 51 of the portable detector 12 that detects the presence or absence of communication between the examinee terminal 16 and the wearable terminals 17, 18, and the accuracy of determining whether communication is occurring between the examinee terminal 16 and the wearable terminals 17, 18 can be maintained.

[0050] Since the supervisor 14 can move around the examination venue 13 carrying the portable detector 12, he or she can approach the examinee 15 suspected of cheating. Therefore, the examinee 15 who is cheating can be accurately identified, and an examinee 15 who is not cheating can be prevented from being mistaken for an examinee 15 who is cheating. Furthermore, the alert generated by the alert generator 55 is unlikely to be noticed by the examinee 15. Therefore, it is possible to prevent the examinee 15 from being hindered in taking the examination and from losing concentration. Furthermore, if the portable detector 12 makes the decision in step S25 after determining Yes in step S24, misidentification can be reliably prevented.

[0051] In addition, since the supervisor 14 can move around the examination venue 13 carrying the portable detector 12, the number of portable detectors 12 can be reduced compared to the case where a detector is provided at each table 25. Therefore, the manufacturing cost of the portable detectors 12 and the construction cost of the communication detection system 10 can be reduced. Furthermore, since the number of portable detectors 12 is reduced, the management of the portable detectors 12 is easier than the conventional technology in which a communication detector is provided at every table and the thresholds stored in the memory units of all the communication detectors are changed. Furthermore, since the number of portable detectors 12 is reduced, the processing amount of the communication detection computer 11 that processes and stores the information and data acquired from the portable detectors 12 is reduced, and the amount of information and data stored in the auxiliary storage device 41 is reduced. Therefore, it is possible to speed up the processing in the communication detection computer 11 and reduce the capacity of the auxiliary storage device 41.

[0052] Furthermore, if information on the examination venue 13 and part of the location information of each monitor 14 are stored in advance in the auxiliary storage device 51 of the portable detector 12, it is not necessary to obtain information on the examination venue 13 and location information of each monitor 14 from the communication detection computer 11 in step S21 of Fig. 3. In other words, the portable detector 12 can execute the communication detection method of Fig. 3 without obtaining information and control signals from the communication detection computer 11. This reduces the amount of processing by the control circuit 50, which processes and stores the information and data obtained by the portable detector 12, and reduces the amount of information and data stored in the auxiliary storage device 51. This makes it possible to speed up processing in the portable detector 12 and reduce the capacity of the auxiliary storage device 51.

[0053] (supplementary explanation) An example of the technical meaning of the matters disclosed in this embodiment is as follows: The portable detector 12 is an example of a communication detector for a fraudulent terminal. The main body 63 is an example of a main body. The auxiliary memory device 51 is an example of a memory device. The control circuit 50 is an example of a control circuit. The alert generator 55 is an example of an alert generator. The antenna 54 is an example of an antenna. The examination venue 13 is an example of a specific area. The examinee 15 is an example of a fraudulent person. The examinee terminal 16 is an example of a fraudulent person terminal. The wearable terminals 17 and 18 are examples of wearable terminals.

[0054] The judgments of steps S22, S24, and S25 are an example of a first process executed by the control circuit. The process of step S26 is an example of a second process executed by the control circuit. The process of step S21 is an example of a third process executed by the control circuit. The process of step S24 is an example of a fourth process executed by the control circuit. The process of step S22 is an example of a fifth process executed by the control circuit.

[0055] This embodiment is not limited to those disclosed using the drawings, and various modifications can be made without departing from the gist of the present invention. The specific area may be a space that is not partitioned by a shield such as a side wall. For example, if an examinee is allowed to go to a restroom temporarily from an examination hall, a supervisor carrying a portable detector can move through a corridor, stairs, passage, etc. to detect radio communication between an examinee terminal carried by the examinee and a wearable terminal with the portable detector, and execute the communication detection method shown in FIG. 3, and execute the communication detection method responding to the application example of FIG. 3. In such a case, the corridor, stairs, passage, restroom, etc. correspond to the specific area. In addition, the presence or absence of a table does not matter. In other words, if the movement of users within the specific area is restricted, that is, in an environment where the position of the user is fixed, it is possible to identify one user who is communicating radio signals with an unauthorized person terminal by the communication detector, communication detection computer, and communication detection system.

[0056] The standard of radio communication between the examinee terminal and the wearable terminal detected by the portable detector may be a standard other than Wi-Fi and Bluetooth, such as WIMAX (registered trademark, Worldwide Interoperability for Microwave Access). The short-distance wireless communication detected by the portable detector may be a communication other than radio communication, such as infrared communication.

[0057] The examinations described in this embodiment include university entrance exams, high school entrance exams, junior high school entrance exams, etc., as well as qualification exams, promotion exams, regular exams, etc. In addition, in a plan view of the examination venue, the examination venue may have any shape, such as a circle, an ellipse, a triangle, a pentagon, a hexagon, etc. In addition, the examination venue may be either inside or outside a building.

[0058] The "communication detection computer" disclosed in this embodiment and the drawings can also be defined as a "fraudulent information processing computer". The "processing unit" can also be defined as a "processing circuit". The "storage device" can also be defined as a "storage circuit". The "control unit" can also be defined as a "control circuit". The "operation unit" can also be defined as an "operator". The "wearable terminal" can also be defined as a "wearable computer". The "examinee terminal" can also be defined as an "examinee computer".

[0059] This embodiment also discloses the following communication detection computer and communication detection system. For example, the communication detection computer is connected to a communication detector for an unauthorized user terminal carried by a monitor in a specific area in order to detect the presence or absence of communication by an unauthorized user terminal carried by an unauthorized user in the specific area, and includes a storage device storing a program, and a control circuit that reads the program stored in the storage device and executes processing, in which the control circuit processes information acquired from the communication detector for the unauthorized user terminal to execute a first process of determining the presence or absence of communication between the unauthorized user terminal and a wearable terminal worn by the unauthorized user on the body, and a second process of sending a control signal to the communication detector for the unauthorized user terminal to cause the communication detector to generate an alert when it is determined that communication has occurred between the unauthorized user terminal and the wearable terminal.

[0060] Also disclosed is a communication detection system comprising: a communication detector for an unauthorized user terminal provided within a specific area to detect the presence or absence of communication by an unauthorized user terminal held by an unauthorized user within the specific area; and a communication detection computer which performs two-way communication with the communication detector for the unauthorized user terminal, the communication detection computer comprising a storage device in which a program is stored, and a control circuit which reads the program stored in the storage device and executes processing, the communication detector for the unauthorized user terminal being carried by a monitor who moves within the specific area to monitor the unauthorized user, and comprising an alert generator, the control circuit performing a first process of determining whether communication has occurred between the unauthorized user terminal and a wearable terminal worn by the unauthorized user by processing information obtained from the communication detector for the unauthorized user terminal, and a second process of sending a control signal to the communication detector for the unauthorized user terminal to cause the alert generator to generate an alert when it is determined that communication has occurred between the unauthorized user terminal and the wearable terminal. [Industrial Applicability]

[0061] This embodiment can be used as a communication detector for a malicious terminal that determines whether communication has occurred between a malicious terminal and a wearable terminal within a specific area. [Explanation of symbols]

[0062] 10: communication detection system, 11: communication detection computer, 12: portable communication detector, 16: examinee terminal, 17, 18: wearable terminal, 50: control circuit, 41, 51: auxiliary storage device, 54: antenna, 55: alert generator, 63: main body

Claims

1. A communication detector that detects the presence or absence of communication by an unauthorized person's terminal carried by an unauthorized person within a specific area, a main body carried by a monitor who moves within the specific area to monitor the unauthorized person; a storage device provided in the main body, storing a program, and storing a threshold value for determining whether communication has been performed between the unauthorized person's terminal and a wearable terminal worn by the unauthorized person; A control circuit provided in the main body and configured to read the program stored in the storage device and execute processing; An alert generator provided on the main body; having The control circuit includes: a first process of determining whether communication has been performed between the malicious terminal and the wearable device by comparing a communication strength between the malicious terminal and the wearable device with the threshold; a second process of generating an alert by the alert generator when it is determined that communication has been performed between the unauthorized person terminal and the wearable terminal; A communication detector for a malicious terminal.

2. 2. The communication detector for a malicious terminal according to claim 1, The control circuit includes: a third process for identifying each of the plurality of tables located in the specific area; A fourth process of identifying a table used by an unauthorized person who possesses the unauthorized person terminal that has communicated with the wearable device, among the plurality of tables; A communication detector for a malicious terminal further performs the above steps.

3. 3. The communication detector for an unauthorized terminal according to claim 2, The main body is further provided with an antenna for receiving radio signals communicated between the unauthorized terminal and the wearable terminal, The control circuit further executes a fifth process of determining a movement path of the monitor within the specific area, The fourth process executed by the control circuit is a communication detector for a fraudster terminal that identifies the table being used by the fraudster when the monitor moves to either side of a designated table and the antennas receive radio signals on either side of the designated table.

4. 2. The communication detector for a malicious terminal according to claim 1, The specific area includes an examination venue; The fraudster includes a test taker, and a communication detector for a fraudster terminal.