Fraud prevention method, fraud prevention system and program

Abstract

To provide a fraud prevention method, a fraud prevention system and a program for preventing crime in an entire region from fraudulent phone calls. [Solution] A method for preventing fraud by utilizing a suspicious database in which suspicious telephone numbers that are red flag telephone numbers are registered, and a registrant database in which registrant telephone numbers and postal codes of registrant addresses on telephone terminal devices are registered, and includes the following steps: when a call is received at a first registrant's telephone terminal device registered in the registrant database (S101 Yes), steps S102 and S103 determine whether the calling telephone number is registered in the suspicious database; if it is determined that the calling telephone number is registered in the suspicious database (S103 Yes), step S104 determines a warning area including an area corresponding to the postal code of the first registrant registered in the registrant database; and step S105 issuing a warning to the telephone terminal devices of other registrants in the warning area registered in the registrant database.

Description

[Technical Field]

[0001] The present invention relates to a fraud prevention method, a fraud prevention system, and a program for preventing fraud by telephone or fraud initiated by telephone. [Background technology]

[0002] As a technology for preventing fraud damage from fraudulent calls, Patent Document 1 discloses a system that includes a means for predicting the possibility of a fraudulent call from the content of the call, forcibly interrupting the conversation, and issuing a warning to the recipient, a means for analyzing the content of the call, and a means for interrupting the conversation. This system converts the content of the call from voice to text, analyzes the frequency and context of specific keywords and phrases, and controls the system to interrupt the conversation if it determines that the call is likely to be a fraudulent call. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2025-045141 Summary of the Invention [Problem to be solved by the invention]

[0004] The people or groups who perpetrate these scams use information on other people's phone numbers that they have obtained by some means to make fraudulent phone calls and defraud them of money or valuables. Fraudulent calls are often concentrated in certain areas, so not only those who receive fraudulent calls but also those in neighboring areas need to be careful.

[0005] The present invention has been made in view of the above circumstances, and its object is to provide a fraud prevention method, a fraud prevention system, and a program that can protect an entire area from fraudulent phone calls. [Means for solving the problem]

[0006] A fraud prevention method according to a first aspect of the present invention is a method for preventing fraud by utilizing a suspicious database in which suspicious telephone numbers, which are telephone numbers requiring caution, and a registrant database in which registrant telephone numbers, which are the telephone numbers of registrants on telephone terminal devices, and the postal codes of the registrants' addresses, are registered.The fraud prevention method includes a first step of determining whether the calling telephone number is registered in the suspicious database when a call is received at the telephone terminal device of a first registrant registered in the registrant database; a second step of determining a warning area including an area corresponding to the postal code linked to the first registrant registered in the registrant database if it is determined in the first step that the calling telephone number is registered in the suspicious database; and a third step of processing warnings to the telephone terminal devices of other registrants in the warning areas registered in the registrant database.

[0007] A fraud prevention system according to a second aspect of the present invention is a fraud prevention system comprising: a suspicious database in which suspicious telephone numbers, which are telephone numbers requiring caution, a registrant database in which registrant telephone numbers, which are the telephone numbers of registrants on telephone terminal devices, and the postal codes of the registrants' addresses, are registered; a telephone number analysis unit that determines whether the calling telephone number is registered in the suspicious database when a call is received at the telephone terminal device of a first registrant registered in the registrant database; a region determination unit that, if the telephone number analysis unit determines that the calling telephone number is registered in the suspicious database, determines a warning region including an area corresponding to the postal code linked to the first registrant registered in the registrant database; and a warning unit that processes warnings to the telephone terminal devices of other registrants in the warning region registered in the registrant database.

[0008] A program relating to a third aspect of the present invention is a program that performs processing to prevent fraud by using a suspicious database in which suspicious telephone numbers, which are telephone numbers that require caution, and a registrant database in which registrant telephone numbers, which are the telephone numbers of registrants on telephone terminal devices, and the postal codes of the registrants' addresses, are registered.The program causes a computer to execute the following steps: a first step of determining whether the calling telephone number is registered in the suspicious database when a call is received at the telephone terminal device of a first registrant registered in the registrant database; a second step of determining a warning area including an area corresponding to the postal code linked to the first registrant registered in the registrant database, if it is determined in the first step that the calling telephone number is registered in the suspicious database; and a third step of performing warning processing on the telephone terminal devices of other registrants in the warning areas registered in the registrant database. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a fraud prevention method, a fraud prevention system, and a program that can protect an entire area from fraudulent phone calls. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating the configuration of a fraud prevention system according to this embodiment. [Figure 2] FIG. 2 is a block diagram illustrating the configuration of the camera server. [Figure 3] FIG. 3 is a diagram illustrating an example of the camera information. [Figure 4] FIG. 4 is a block diagram illustrating the configuration of the suspicious person analysis server. [Figure 5] FIG. 5 is a diagram showing an example of the suspicious person database. [Figure 6] FIG. 6 is a block diagram illustrating an example of the configuration of the management server. [Figure 7] FIG. 7 is a diagram illustrating an example of the registrant database. [Figure 8]FIG. 8 is a flowchart illustrating an example of a fraud prevention method. [Figure 9] FIG. 9 is a flowchart illustrating an example of a method for determining a warning area. [Figure 10] FIG. 10 is a flowchart illustrating an example of the attention-calling process. [Figure 11] FIG. 11 is a flowchart illustrating another example of the attention-drawing process. [Figure 12] FIG. 12 is a flowchart illustrating another example of a fraud prevention method. [Figure 13] FIG. 13 is a diagram illustrating a specific example of the fraud prevention method according to this embodiment. [Figure 14] FIG. 14 is a diagram illustrating a specific example of the fraud prevention method according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same components will be designated by the same reference numerals, and the description of components that have already been described will be omitted as appropriate.

[0012] (Fraud prevention system) FIG. 1 is a diagram illustrating the configuration of a fraud prevention system according to this embodiment. As shown in Figure 1, the fraud prevention system 1 of this embodiment includes a camera server 10 connected to a network N, a suspicious person analysis server 20, and a management server 30, and is a system that prevents fraud by using a suspicious person database 100 and a registered person database 200.

[0013] The network N includes the Internet, a LAN (Local Area Network), and data communication lines. Multiple camera CAs are connected to the camera server 10. The camera CAs include security cameras for local areas, stores, and homes, cameras installed in stores, and cameras installed in intercoms. The suspicious person analysis server 20 is connected to the network N and analyzes suspicious persons from telephone numbers and images captured by the camera CAs based on a suspicious person database 100. The management server 30 is connected to the network N and is connected to telephone terminal devices such as a landline phone PH1 and a mobile phone PH2 via a CTI (Computer Telephony Integration) 40.

[0014] FIG. 2 is a block diagram illustrating the configuration of the camera server. 2, the camera server 10 includes a communication unit 11, a processing unit 12, and camera information 13. The communication unit 11 is a device for communicating with the camera CA and with other devices via the network N, and includes a device (such as a network interface card) for communicating in accordance with a predetermined communication standard such as Ethernet (registered trademark) or wireless LAN. The processing unit 12 communicates with the camera CA and executes predetermined processing related to the video captured by the camera CA based on the camera information 13, which will be described later.

[0015] FIG. 3 is a diagram illustrating an example of the camera information. Reference numeral 130 in Fig. 3 represents a group of information related to one camera CA (see Fig. 1). The group of information 130 shown in the example of Fig. 3 includes a camera ID for identifying each camera CA, a name given to each camera CA, the model of the camera CA, functions provided by the camera CA (e.g., a gender determination function, an age determination function, an expression determination function, etc.), the address of the camera CA on the network N (e.g., an IP address), the current status (whether or not connected to the network N, etc.), shooting information such as the address of the location where the image was taken and the time of shooting, and the postal code of the address (postal code of the shooting location). The camera information 13 includes a group of information 130 as shown in Fig. 3 for each of one or more cameras CA.

[0016] The group of information 130 may also include a store ID, a repeater ID, and characteristic information of the object, which are used when analyzing a suspicious person. The repeater ID is identification information that is assigned when an object that is determined to be the same is photographed repeatedly by the same camera CA. The repeater ID is linked to the photographing information, postal code, characteristic information of the object, etc. The information linked to the repeater ID may be registered in the suspicious person database 100.

[0017] FIG. 4 is a block diagram illustrating the configuration of the suspicious person analysis server. 4, the suspicious person analysis server 20 includes a communication unit 21 and a processing unit 22. The communication unit 21 is a device for inputting and outputting information to and from the suspicious person database 100 and for communicating with other devices via the network N, and includes a device (such as a network interface card) that communicates in accordance with a predetermined communication standard such as Ethernet (registered trademark) or wireless LAN.

[0018] The processing unit 22 includes an image analysis unit 221 and a suspicious person tracking unit 222. The image analysis unit 221 and the suspicious person tracking unit 222 may be included in the functions of a suspicious person screening engine implemented as processing in the processing unit 22. The image analysis unit 221 analyzes an image captured by the camera CA sent from the camera server 10 and executes processing to match the image with an image of a suspicious person registered in the suspicious person database 100 (such as an image of the face of the suspicious person or an image of the license plate number of the suspicious vehicle). The image analysis unit 221 analyzes the suspicious person according to predetermined conditions based on instructions from the management server 30.

[0019] The suspicious person tracking unit 222 performs processing to track images of a suspicious person taken by multiple cameras CA based on the image of the suspicious person obtained by analysis by the image analysis unit 221. Here, the suspicious person includes a suspicious person, a suspicious vehicle, a suspicious object, etc. The suspicious person tracking unit 222 can identify which camera CA the image of the suspicious person was taken from and at what time, and can grasp the movement history of the suspicious person, such as when and where the suspicious person moved. The movement history may be registered in the suspicious person database 100. The suspicious person database 100 includes suspicious person information (suspicious person database) in which images and characteristics of suspicious persons are registered, and suspicious phone numbers (suspicious number database).

[0020] FIG. 5 is a diagram illustrating an example of the suspicious database. The information 101 registered in the suspicious database 100 includes suspicious telephone numbers, suspicious person information, tracking information, and repeater IDs. Suspicious telephone numbers are telephone numbers of past fraud victims, attempted frauds, and fraud-like callers. Suspicious person information is information on people, vehicles, etc. who have previously been victims of fraud, attempted frauds, or committed fraud-like acts. Suspicious person images include images of the suspicious person's face, half-body or full-body images of the suspicious person, images of the suspicious vehicle's license plate number, images of the suspicious vehicle, and images of suspicious groups. Tracking information is information on the movement history of the suspicious person (when and where the person moved) obtained by tracking by the suspicious person tracking unit 222. A repeater ID is identification information assigned when an object determined to be the same is repeatedly photographed by the same camera CA. If different repeater IDs are assigned to the same object because it is photographed by different cameras CA, it is recommended that a unified repeater ID be assigned if the suspicious person analysis server 20 determines that the object is the same by matching characteristics.

[0021] FIG. 6 is a block diagram illustrating an example of the configuration of the management server. 6, the management server 30 includes a communication unit 31 and a processing unit 32. The communication unit 31 is a device for inputting and outputting information to and from the registrant database 200 and for communicating with other devices via the network N, and includes a device (such as a network interface card) that communicates in accordance with a predetermined communication standard such as Ethernet (registered trademark) or wireless LAN.

[0022] The processing unit 32 includes a telephone number analysis unit 321, a warning area determination unit 322, and a warning unit 323. The telephone number analysis unit 321 analyzes the telephone number of the caller of an incoming call to determine whether or not the call is suspicious. That is, when a call is received at a telephone terminal device (subscription telephone PH1, mobile telephone PH2) of a registrant (first registrant) registered in the registrant database 200, the telephone number analysis unit 321 determines whether or not the calling telephone number is registered in the suspicious database 100.

[0023] The warning area determination unit 322 performs processing to determine a warning area when the telephone number analysis unit 321 determines that the calling telephone number is registered in the suspicious database 100. That is, when a suspicious call is made to a first registrant, the warning area determination unit 322 performs processing to determine a warning area including an area corresponding to a postal code linked to the first registrant registered in the registrant database 200. Here, the warning area may be an area corresponding to the postal code of the first registrant, or may include that area and adjacent areas.

[0024] The warning unit 323 performs a warning process on the telephone terminal devices of other registrants in the warning area registered in the registrant database 200. For example, when a suspicious call is made to a first registrant, a warning is issued to other registrants whose addresses are in the warning area determined by the warning area determination unit 322. Examples of warnings include sending a notification email to the registered email address of the other registrant, sending a message to the registered mobile phone of the other registrant, or rejecting calls from that phone number to the other registrant.

[0025] FIG. 7 is a diagram illustrating an example of the registrant database. Reference numeral 201 in FIG. 7 represents a group of information related to one registrant. A registrant is an individual or corporation that has signed a contract in advance. The group of information 201 shown in the example of FIG. 7 includes a registrant ID that identifies each registrant, the registrant's telephone number, and the registrant's postal code. If necessary, the registrant's name, email address, and repeater ID may also be included. If the registrant is an individual, the registrant's date of birth, gender, and facial image may also be included. The repeater ID is identification information that is assigned when the same registrant is photographed repeatedly with the same camera CA. The repeater ID is linked to the photographing information, postal code, etc.

[0026] When using the fraud prevention system 1 according to this embodiment, the user must register in advance in the registrant database. Users can use the fraud prevention system 1 by registering their telephone number and postal code. In other words, the fraud prevention system 1 according to this embodiment can provide services using only a telephone number and postal code, without the need for detailed personal information such as the user's name or address. Registration in the registrant database can be performed by accessing the management server 30 using application software (so-called app) on a mobile phone or a personal computer and performing the registration process.

[0027] In the fraud prevention system 1 of this embodiment, when a suspicious phone call is made to a first registrant registered in the registrant database 200, a warning area is determined based on the postal code of the first registrant registered in the registrant database 200, and other registrants in that warning area are warned about fraud, making it possible to prevent crime throughout the entire area where people are likely to be victims of fraud.

[0028] (Fraud prevention methods) A fraud prevention method using the fraud prevention system 1 having the above-described configuration will now be described. FIG. 8 is a flowchart illustrating an example of a fraud prevention method. First, CTI 40 determines whether a call has been received at the telephone terminal device of a user (first registrant) previously registered in registrant database 200 (step S101). If a call has been received (Yes in step S101), CTI 40 sends the telephone number of the caller who made the call to the telephone terminal device of the first registrant to management server 30 and requests an inquiry about the telephone number (step S102). The processing of steps S101 to S102 is an example of a first step.

[0029] In response to the inquiry from the CTI 40, the processing unit 32 (telephone number analysis unit 321) of the management server 30 determines whether the calling telephone number is registered in the suspicious database 100 in response to the inquiry from the CTI 40 (step S103). If the calling telephone number is registered in the suspicious database 100 (Yes in step S103), the processing unit (warning area determination unit 322) of the management server 30 performs a warning area determination process (step S104). The processes of steps S103 to S104 are an example of the second step. The warning area determination process shown in step S104 will be described later.

[0030] After the warning area is determined, the processing unit 32 (warning unit 323) of the management server 30 performs warning processing (step S105). The processing of step S105 is an example of the third step. The warning processing shown in step S105 will be described later. On the other hand, if the calling telephone number is not registered in the suspicious call database 100 (No in step S103), the CTI 40 determines whether the call to the first registrant was a suspicious call (step S106). This determination is made based on information sent by the first registrant to the CTI 40 from a telephone terminal device or the like. For example, if the call is suspicious, information indicating that it was a suspicious call is sent to the CTI 40 by operating a button on the first registrant's subscriber telephone PH1 or a button on an app running on the first registrant's mobile phone PH2. If it is a suspicious call (Yes in step S106), the management server 30 registers the outgoing telephone number as a suspicious telephone number in the suspicious database 100 (step S107). If it is not a suspicious call (No in step S106), the process ends.

[0031] FIG. 9 is a flowchart illustrating an example of a method for determining a warning area. The process shown in FIG. 9 is an example of the process of determining the warning area shown in step S104 of FIG. When a call is made to a first registrant from a telephone number (suspicious telephone number) registered in the suspicious database 100, the warning area determination unit 322 of the processing unit 32 of the management server 30 performs a process to obtain the postal code linked to the first registrant from the registrant database 200 (step S201).

[0032] Next, the warning area determination unit 322 performs a process of acquiring the area of ​​the acquired postal code (step S202). Specifically, the warning area determination unit 322 acquires information on the address to which the acquired postal code is assigned. Next, the warning area determination unit 322 acquires information on addresses of areas adjacent to the area to which the acquired postal code is assigned (step S203). The acquisition of adjacent areas may be information on addresses associated with the area of ​​the acquired postal code by the postal codes of areas adjacent on a map, or may be information on addresses included in a circular area of ​​a certain radius centered on the area of ​​the acquired postal code.

[0033] Next, the warning area determination unit 322 performs a process to determine a warning area (step S204). The warning area may be an area that combines the area (address) corresponding to the postal code linked to the first registrant and adjacent areas, or it may determine only the area (address) corresponding to the postal code linked to the first registrant as the warning area.

[0034] FIG. 10 is a flowchart illustrating an example of the attention-calling process. The process shown in FIG. 10 is an example of the attention-drawing process shown in step S105 of FIG. The warning unit 323 of the processing unit 32 of the management server 30 performs a process of obtaining information of registered users whose postal codes in the warning area determined by the warning area determination unit 322 are registered from the registrant database 200 (step S301).

[0035] Next, the warning unit 323 performs a process of sending warning information to the registered users acquired in step S301 (step S302). For example, the warning unit 323 may send warning information to the telephone terminal device of a registrant whose postal code in the warning area is registered, send a warning message to the registrant's mobile phone, or send a warning email to the registrant's email address. This allows registrants in the warning area to be on guard against fraud. In addition, a process may be performed to reject an incoming call from a registrant midway. This prevents a first registrant from receiving a fraudulent call.

[0036] FIG. 11 is a flowchart illustrating another example of the attention-drawing process. The process shown in FIG. 11 is another example of the attention-drawing process shown in step S105 of FIG. The warning unit 323 of the processing unit 32 of the management server 30 performs a process of obtaining information of registered users whose postal codes in the warning area determined by the warning area determination unit 322 are registered from the registrant database 200 (step S401).

[0037] Next, the warning unit 323 registers the registered telephone numbers of the registered users acquired in step S301 so that the telephone number from which a call made to the first registrant will be rejected (step S402). The registration of call rejection is performed for each registrant in the registrant database 200. In this way, if a fraudulent call is made to the first registrant, and a call from the same telephone number is made to a registrant in the warning area, the call will be rejected, thereby preventing fraud from occurring.

[0038] FIG. 12 is a flowchart illustrating another example of a fraud prevention method. In FIG. 12, the processes in steps S501 to S504 and steps S506 to S507 are the same as the processes in steps S101 to S104 and steps S106 to S107 shown in FIG. 8, and therefore a description thereof will be omitted.

[0039] After the warning area has been determined, the processing unit 32 of the management server 30 instructs the suspicious person analysis server 20 to acquire camera images (step S505). Upon receiving this instruction, the suspicious person analysis server 20 requests the camera server 10 to acquire images taken by the camera CA installed in the warning area. The camera information 13 registers information on the postal code corresponding to the location where the camera CA is installed. Therefore, based on a postal code included in the warning area, the management server 30 requests the suspicious person analysis server 20 to acquire images taken by the camera CA with that postal code registered.

[0040] Next, the image analysis unit 221 in the processing unit 22 of the suspicious person analysis server 20 recognizes a suspicious person from the acquired image taken by the camera CA (step S506). That is, the image analysis unit 221 analyzes the image taken by the camera CA sent from the camera server 10 and matches it with images of suspicious people registered in the suspicious person database 100. Here, the image of the suspicious person includes an image of the suspicious person's face, an image of the license plate number of the suspicious vehicle, etc. In recognizing a suspicious person, the suspicious person's behavior may be tracked by the suspicious person tracking unit 222, and the suspicious person may be recognized based on the tracking results. Also, if an object determined to be the same from images acquired by the camera CA is photographed multiple times within a predetermined period of time within a warning area, the suspicious person may be recognized as a suspicious person.

[0041] If a suspicious person is recognized, since there is a high possibility that the suspicious person is in the warning area, a warning process is executed for the warning area (step S507). In this warning process, an image of the recognized suspicious person may be sent to the mobile phone of a registered person in the warning area. This sends information including an image of the suspicious person actually taken by a camera CA in the warning area to the registered person, further raising awareness of fraud. Furthermore, the fraud prevention system 1 according to this embodiment may be linked to a security company's system, so that when a suspicious person is recognized by the fraud prevention system 1, information about the suspicious person may be automatically sent to the security company. This allows security guards from the security company to be deployed to the warning area as quickly as possible.

[0042] (Example) 13 and 14 are diagrams illustrating a specific example of the fraud prevention method according to this embodiment. For example, in order to efficiently commit fraud by telephone, such as cash withdrawal, robbery, and burglary, perpetrators tend to make fraudulent calls to multiple homes in a targeted area. After making the call, perpetrators often decide on a home to commit the fraud and then scout the area surrounding the home before committing the fraud. Therefore, the fraud prevention method according to this embodiment issues an alert for the area linked to the phone number from which the fraudulent call was made, as well as neighboring areas. Furthermore, suspicious individuals can be identified and tracked based on images taken by a camera CA registered with the postal code of the targeted area, thereby preventing robbery and burglary before they occur.

[0043] In the example shown in Figure 13, registrants A and B are receiving fraudulent calls. When a call is received, the calling telephone number is checked against the suspicious call database 100. If a predetermined number of calls (e.g., two or more) are made from the same telephone number registered in the suspicious call database 100 (in the example of Figure 13, calls are made to two registrants A and B), the registered postal codes of registrants A and B (e.g., 〒1234-0002) are obtained from the registrant database 200, and the postal codes of the areas adjacent to that postal code (e.g., 〒1234-0001, 〒1234-0003) are obtained to determine the warning area. Then, a warning is issued to registrants C and D, whose registered postal codes are included in the warning area. As a result, even if registrants C and D receive a fraudulent call, registrants C and D, who receive the warning, can recognize in advance that the call is likely to be a fraudulent call.

[0044] The fraudster will also identify the target house through the fraudulent phone call and begin scouting the area. In the example shown in Figure 14, suspicious individuals are tracked based on images from cameras (security cameras, store cameras, intercoms, etc.) in the area where the alert level has been raised due to the fraudulent phone call. For example, if the same person's image or car number is detected multiple times in a day after the fraudulent phone call, tracking will begin as a repeater.

[0045] Specifically, if an image of an unfamiliar face of a non-registered person is photographed multiple times in a specified area within a specified time period, the person is recognized as suspicious and is tracked. If images of the faces of registrants are registered in the registrant database 200, it is possible to determine from the image taken by camera CA whether the person is a registrant or not.

[0046] Furthermore, if an image G1 acquired by the intercom camera CA shows that a person who is determined to be the same (the probability that the image is the same is greater than a predetermined percentage) has visited multiple times, the person is recognized as a suspicious person and tracked. If the camera CA captures images of an unfamiliar face multiple times, these images can be superimposed, and if there are more than a predetermined number of images that appear to be the same, the image can be registered in the suspicious person database 100.

[0047] In addition, if the license plate image G2 of the car is recognized as a rental car, and the car is photographed by a security camera multiple times in a short period of time, the car will be recognized as suspicious and tracked.

[0048] When tracking, images of the same object can be linked with a repeat ID to make the tracking process easier. As a result of tracking, areas where a suspicious person has stayed for a long time can be designated as areas requiring special vigilance and a warning process can be performed. Furthermore, the length of time the suspicious person stayed and their location can be displayed by color coding or displaying their trajectory on a map.

[0049] The fraud prevention method according to this embodiment makes it possible to implement crime prevention measures in the area of ​​the postal code and adjacent areas based on the postal code of a registered person who has received a fraudulent call.

[0050] (program) The program according to this embodiment causes a computer to execute each step of the fraud prevention method described above. The program may be recorded, for example, on a computer-readable recording medium (such as an optical disc, a memory card, a USB memory, or other non-transitory tangible medium). When the fraud prevention system 1 is configured using a computer, the processing units 12, 22, and 32 may read and execute at least a portion of one or more programs recorded on such a recording medium using a recording medium reader (such as an optical disc device) or an interface device (such as a USB interface), not shown. Alternatively, the processing units 12, 22, and 32 may download and execute at least a portion of one or more programs from another device connected to a communication network.

[0051] As described above, according to this embodiment, it is possible to provide a fraud prevention method, a fraud prevention system 1, and a program that can protect an entire region from fraudulent phone calls. In addition, in the present invention, if a registrant's postal code is registered, there is no need to register the address itself, and even if the registrant's postal code is leaked, the address itself will not be leaked, so the privacy of the registrant can be protected. Therefore, registrants can use the service with peace of mind, and the number of registrants can be promoted.

[0052] The present invention is not limited to the above-described embodiment, but includes various variations. For example, in addition to the above-described examples, the warning may be issued using disaster prevention administrative radio, local broadcasting, disaster prevention radio, community FM, etc. in the warning area.

[0053] In the above-described embodiment, a person or a vehicle license plate number is used as an example of a target for recognizing a suspicious individual, but any object may also be used. For example, any object such as an object carried by a suspicious individual (such as a hat, glasses, or bag), the color or shape of a vehicle, or an object inside the vehicle may be used as a target for recognizing a suspicious individual. [Explanation of symbols]

[0054] 1...fraud prevention system, 10...camera server, 11...communication unit, 12, 22...processing unit, 13...camera information, 20...suspicious person analysis server, 21, 31...communication unit, 30...management server, 32...processing unit, 100...suspicious database, 101, 130, 201...information, 200...registrant database, 221...image analysis unit, 222...suspicious person tracking unit, 321...telephone number analysis unit, 322...warning area determination unit, 323...warning unit, A, B, C, D...registrant, CA...camera, G1, G2...image, N...network, PH1...subscription telephone, PH2...mobile phone

Claims

1. A method for preventing fraud using a suspicious database in which suspicious telephone numbers, which are telephone numbers requiring caution, are registered, and a registrant database in which registrant telephone numbers, which are telephone numbers of registrants in telephone terminal devices, and postal codes of the addresses of the registrants are registered, a first step of determining whether or not a calling telephone number is registered in the suspicious database when a call is received at the telephone terminal device of a first registered user registered in the registered user database; a second step of determining a warning area including an area corresponding to the postal code linked to the first registrant registered in the registrant database when it is determined in the first step that the telephone number of the caller is registered in the suspicious database; a third step of issuing a warning to the telephone terminal devices of other registered users in the warning area who are registered in the registered user database; a fourth step of recognizing a suspicious object from an image acquired by a camera installed in the warning area and sending suspicious person information to the registered person in the warning area; Equipped with the third step further includes a process of rejecting the incoming call at the telephone terminal device of the first registrant midway through the call; The warning process in the third step includes rejecting an incoming call from the calling telephone number at the telephone terminal device of the other registered person in the warning area. Fraud prevention methods.

2. The suspicious database includes images of suspicious persons' faces, 2. The fraud prevention method according to claim 1, wherein the fourth step includes recognizing the suspicious person by matching the image acquired by the camera with an image of the suspicious person's face registered in the suspicious person database.

3. The fraud prevention method described in claim 1, wherein the fourth step includes sending suspicious person information to the registered person in the warning area if an object determined to be the same from images acquired by the camera is photographed multiple times within a specified period of time within the warning area.

4. The suspicious database includes images of suspicious persons' faces, The camera includes an intercom installed in the building that can capture images of visitors; 2. The fraud prevention method according to claim 1, wherein the fourth step includes recognizing a person as a suspicious person when the person is determined to be the same person from the image acquired by the intercom and has visited the intercom multiple times.

5. A fraud prevention method as described in claim 1, further comprising a fifth step of registering the calling telephone number in the suspicious database when the calling telephone number is not registered in the suspicious database in the first step and the first registrant determines that the content of the incoming call from the calling telephone number is suspicious.

6. A suspicious database containing suspicious phone numbers that require caution, a registrant database in which registrant telephone numbers, which are telephone numbers of registrants on telephone terminal devices, and postal codes of the addresses of the registrants are registered; a telephone number analysis unit that, when a call is received at the telephone terminal device of a first registrant registered in the registrant database, determines whether the calling telephone number is registered in the suspicious database; a region determination unit that determines a warning region including a region corresponding to the postal code linked to the first registrant registered in the registrant database when the telephone number analysis unit determines that the outgoing telephone number is registered in the suspicious database; a warning unit that performs a warning process on the telephone terminal devices of other registrants in the warning area who are registered in the registrant database; A camera installed within the warning area; a processing unit that recognizes a suspicious object from the image acquired by the camera and sends suspicious person information to the registered person in the warning area; A fraud prevention system with

7. A program for performing fraud prevention processing using a suspicious database in which suspicious telephone numbers, which are telephone numbers requiring caution, are registered, and a registrant database in which registrant telephone numbers, which are telephone numbers of registrants in telephone terminal devices, and postal codes of the addresses of the registrants are registered, On the computer, a first step of determining whether or not a calling telephone number is registered in the suspicious database when a call is received at the telephone terminal device of a first registered user registered in the registered user database; a second step of determining a warning area including an area corresponding to the postal code linked to the first registrant registered in the registrant database when it is determined in the first step that the telephone number of the caller is registered in the suspicious database; a third step of issuing a warning to the telephone terminal devices of other registered users in the warning area who are registered in the registered user database; a fourth step of recognizing a suspicious object from an image acquired by a camera installed in the warning area and sending suspicious object information to the registered person in the warning area; A program that executes the following.

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