JP2020161958A - Server device, control program, and control method - Google Patents

Abstract

To provide a server device or the like capable of preventing a special fraud without involving the interested person of the special fraud.SOLUTION: According to the present invention, a server device includes: a counting part for counting the number of specific phrases included in a conversation between a first telephone set and a second telephone set; a determination part for determining the degree of a risk to the conversation on the basis of the counted number; and a transmission part for transmitting a mail showing that a special fraud occurs to a portable terminal related to a user, transmitting a ringing tone to the first telephone set after a voice communication between the first telephone set and the second telephone set is disconnected if the degree of the risk exceeds a first prescribed value, transmitting a warning sound to the first telephone set if the voice communication with the first telephone set is established, and transmitting instruction information for disconnecting the voice communication between the first telephone set and the second telephone set to an exchange related to the voice communication if the degree of the risk exceeds a second prescribed value larger than the first prescribed value.SELECTED DRAWING: Figure 1

Description

The present invention relates to a server device, a control program, and a control method.

In recent years, fraudulent cases have occurred in which fraudsters use the telephone network to spoof their names and obtain money from others. In particular, when an elderly person's landline or mobile phone receives a call from another person's mobile phone, etc., it is difficult to hear the other person's voice depending on the state of voice communication, and the elderly person receives the incoming call from the elderly person. It was difficult to tell if the call was from a family member. For this reason, there has been a demand for a system for preventing fraud cases using the telephone line network.

For example, Patent Document 1 obtains the content of a call from the other party of the call, and indicates that the call is suspicious when the other party of the call belongs incorrectly and the content of the call contains an NG keyword. A suspicious call determination system is described in which the information is displayed on the telephone used by the user.

JP-A-2007-228384

However, in the conventional system for measures against special fraud, the notification information is simply displayed on the telephone, and when the elderly person is using the telephone, the elderly person displays the displayed notification information. Sometimes I couldn't make an accurate judgment.

The present invention has been made to solve such a problem, and provides a server device, a control program, and a control method capable of preventing special fraud without involving a party to special fraud. The purpose is.

The server device according to the present invention includes telephone number information relating to a registered telephone number registered by a user, phrase information relating to a plurality of specific terms used in special fraud, and a warning voice suggesting the possibility of special fraud. When voice communication is established between the storage unit that stores the above, the first telephone corresponding to the registered telephone number, and the second telephone different from the first telephone, a conversation regarding the conversation between the first telephone and the second telephone. A memory processing unit that stores information in the storage unit, and a counting unit that acquires conversation information from the storage unit each time a predetermined time elapses after voice communication is established and counts the number of specific words and phrases contained in the conversation. A unit, a judgment unit that determines the risk level for conversation based on the counted number, and a mobile terminal related to the user that indicates that a special fraud has occurred when the risk level exceeds the first predetermined value. If the ringing sound is transmitted to the first telephone after the voice communication between the first telephone and the second telephone is disconnected and the voice communication with the first telephone is established, the warning voice is transmitted to the first telephone. When the risk exceeds the second predetermined value, which is larger than the first predetermined value, the transmission unit transmits instruction information for disconnecting the voice communication between the first telephone and the second telephone to the exchange related to the voice communication. And.

Further, in the server device according to the present invention, when the risk level exceeds the second predetermined value, which is larger than the first predetermined value, the transmission unit disconnects the voice communication between the first telephone and the second telephone, and at the same time, 2 It is preferable to transmit instruction information for establishing voice communication between the telephone and the telephone in a specific police agency to the exchange related to voice communication.

Further, in the server device according to the present invention, the storage unit stores voice information for recording a conversation during a call and information regarding a second telephone whose risk level has been determined in the past, and the transmission unit has a past. When voice communication with the first telephone is requested from the second telephone whose degree of risk is determined, it is preferable to transmit the voice information as a ringing tone to the second telephone.

Further, in the server device according to the present invention, the storage unit stores voice information for recording a conversation during a call and information regarding a second telephone whose risk level has been determined in the past, and the transmission unit has a past. When voice communication with the first telephone is requested from the second telephone whose risk level is determined, and when the first telephone requests connection with the second telephone, voice information is transmitted to the second telephone. It is preferable to transmit.

Further, in the server device according to the present invention, the storage unit stores voice information for recording a conversation during a call and information regarding a second telephone whose risk level has been determined in the past, and the transmission unit is a first. When a telephone requests voice communication with a second telephone whose risk level has been determined in the past and the second telephone requests connection to the first telephone, voice information is transmitted to the second telephone. It is preferable to transmit.

Further, in the server device according to the present invention, the storage unit stores the first voice information for inquiring the name and the second voice information for recording the conversation during the call, and the transmission unit is the second telephone from the second telephone. When voice communication with the first telephone is requested and the connection with the second telephone is requested from the first telephone, the first voice information is transmitted to the second telephone, and the storage processing unit transmits the first voice information. The generated voice information from the second telephone in the predetermined recording period after the transmission of the above is stored in the storage unit, the transmitting unit transmits the generated voice information and the second voice information to the second telephone, and the generated voice information is transmitted to the first telephone. When the telephone is transmitted to the telephone and the connection instruction information is acquired from the first telephone, it is preferable to transmit an instruction to establish voice communication between the first telephone and the second telephone to the exchange.

The control program according to the present invention is a control program for a server device having a storage unit, and includes telephone number information relating to a registered telephone number registered by a user and phrase information relating to a plurality of specific terms used in special fraud. , When a warning voice suggesting the possibility of special fraud is stored in the storage unit, and voice communication between the first telephone corresponding to the registered telephone number and the second telephone different from the first telephone is established. , The conversation information about the conversation between the first telephone and the second telephone is stored in the storage unit, and the conversation information is acquired from the storage unit every time a predetermined time elapses after the voice communication is established, and is included in the conversation. The number of specific words is counted, the risk level for conversation is determined based on the counted number, and when the risk level exceeds the first predetermined value, an email indicating that a special fraud has occurred is sent to the user. If the ringing sound is transmitted to the first telephone after the voice communication between the first telephone and the second telephone is disconnected and the voice communication with the first telephone is established, a warning voice is emitted. When the telephone is transmitted to the first telephone and the risk exceeds the second predetermined value, which is larger than the first predetermined value, the instruction information for disconnecting the voice communication between the first telephone and the second telephone is transmitted to the exchange related to the voice communication. Let the server device do the work.

The control method according to the present invention is a control method for a server device having a storage unit, which includes telephone number information relating to a registered telephone number registered by a user, and phrase information relating to a plurality of specific terms used in special fraud. , When a warning voice suggesting the possibility of special fraud is stored in the storage unit, and voice communication between the first telephone corresponding to the registered telephone number and the second telephone different from the first telephone is established. , The conversation information about the conversation between the first telephone and the second telephone is stored in the storage unit, and the conversation information is acquired from the storage unit every time a predetermined time elapses after the voice communication is established, and is included in the conversation. The number of specific words is counted, the risk level for conversation is determined based on the counted number, and when the risk level exceeds the first predetermined value, an email indicating that a special fraud has occurred is sent to the user. If the ringing sound is transmitted to the first telephone after the voice communication between the first telephone and the second telephone is disconnected and the voice communication with the first telephone is established, a warning voice is emitted. When the telephone is transmitted to the first telephone and the risk exceeds the second predetermined value, which is larger than the first predetermined value, the instruction information for disconnecting the voice communication between the first telephone and the second telephone is transmitted to the exchange related to the voice communication. Including that.

The server device, control program, and control method according to the present invention make it possible to prevent special fraud without involving the parties involved in the special fraud.

It is a schematic diagram for demonstrating the outline of the prevention system. It is a figure which shows an example of the schematic structure of the prevention system 1. It is a figure which shows an example of the schematic structure of the mobile phone 2. It is a figure which shows an example of the schematic structure of a communication terminal 3. It is a figure which shows an example of the schematic structure of the control server 9. It is a figure which shows an example of the data structure of various tables. It is a figure which shows an example of the operation flow of the risk degree determination process. It is a figure which shows an example of the operation flow of the risk response processing.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to those embodiments, but extends to the inventions described in the claims and their equivalents.

(Outline of prevention system)
FIG. 1 is a schematic diagram for explaining the outline of the prevention system. In the example shown in FIG. 1, the prevention system includes at least a control server, a communication terminal, and a telephone.

The telephone is owned by a user who can be a fraudulent person such as an elderly person, and the communication terminal is connected to the telephone. The communication terminal has an IC (Integrated Circuit) card such as a USIM (Universal Subscriber Identity Module) card that stores a mobile phone number and user identification information managed by a specific mobile communication operator. The communication terminal connects to a mobile communication network managed by a specific mobile communication operator based on the information stored in the IC card.

The telephone number of the telephone and the mobile phone number of the communication terminal are associated with each other in, for example, a user information management device (HLR (Home Location Register) / HSS (Home Subscriber Server), etc.). As a result, voice communication between the telephone and other telephones (including mobile phones and the like) is realized using the mobile communication network via the communication terminal. The telephone number of the telephone and the mobile phone number of the communication terminal may be associated with each other in a server device or the like different from the user information management device.

Hereinafter, a case where a fraudster commits a special fraud using a mobile phone will be described as an example. Hereinafter, the telephone used by the fraudster may be referred to as a fraudulent telephone.

The control server is connected to the mobile communication network and stores the telephone number of the telephone as a registered telephone number in advance. Hereinafter, the telephone corresponding to the registered telephone number may be referred to as a registered telephone. When a fraudster makes a call to a registered telephone using a fraudulent telephone and voice communication between the registered telephone and the fraudulent telephone is established ((1) in FIG. 1), the control server is a control server between the registered telephone and the fraudulent telephone. Memorize conversational information about the conversation ((2) in FIG. 1).

The control server stores phrase information about a plurality of specific phrases used in special fraud. In the example shown in FIG. 1, "change mobile phone", "change mobile number", "business failure" and the like are stored in the control server as specific words and phrases.

The control server acquires the stored conversation information regarding the conversation between the registered telephone and the fraudulent telephone every time a predetermined time elapses (for example, every 10 seconds) after the voice communication is established. Each time the control server acquires conversation information, it counts the number of specific words and phrases contained in the conversation during the period from the start of establishment of voice communication to the last acquisition of conversation information (Fig.). 1 (3)).

The control server determines the risk level for the conversation based on the counted number of specific words and phrases contained in the conversation, and executes the risk response process according to the determined risk level (FIG. 1). (4)).

In the example shown in FIG. 1, when the number of specific words and phrases contained in the conversation is 5 or more and less than 20, the control server determines that the risk level of the conversation is "1", and the risk level is "1". Execute the mail transmission process according to "1". In the mail transmission process, the control server sends a mail indicating that a special fraud may have occurred to the mobile terminal related to the user of the registered telephone. The mobile terminal for the user of the registered telephone is, for example, a mobile terminal owned by any of the family members of the user of the registered telephone.

When the number of specific words and phrases contained in the conversation is 20 or more, the control server determines that the risk level of the conversation is "2", and gives a voice communication disconnection instruction according to the risk level "2". Execute the process. In the voice communication disconnection instruction process, the control server transmits disconnection instruction information for disconnecting the voice communication between the registered telephone and the fraudulent telephone to the exchange involved in the voice communication between the registered telephone and the fraudulent telephone. The exchange that receives the disconnection instruction information disconnects the voice communication between the registered telephone and the fraudulent telephone.

As described above with reference to FIG. 1, in the prevention system of the present embodiment, fraud is committed based on the number of specific words and phrases used in special fraud included in the conversation between the registered telephone and the fraudulent telephone. Various processes to prevent it are automatically executed. As described above, the prevention system of the present embodiment makes it possible to prevent special fraud without the involvement of parties to special fraud such as users of registered telephones.

The above description of FIG. 1 is merely a description for deepening the understanding of the contents of the present invention. Specifically, the present invention may be carried out in each of the embodiments described below, and may be carried out by various modifications without substantially exceeding the principles of the present invention. All such variations are included within the scope of the present invention and the present specification.

(Prevention system 1)
FIG. 2 is a diagram showing an example of a schematic configuration of the prevention system 1.

The prevention system 1 is a system based on a mobile communication network having a wireless network (eUTRAN) 5 and a core network (EPC) 6 corresponding to the LTE (Long Term Evolution) communication standard. The communication standard of the mobile communication network is not limited to LTE, and may be W-CDMA (Wideband Code Division Multiple Access), CDMA2000 (Code Division Multiple Access 2000), or the like. Hereinafter, a case where the prevention system 1 is a system based on a mobile communication network corresponding to the LTE communication standard will be described as an example.

The wireless network 5 has a base station (eNodeB) 51 capable of communicating with a mobile phone 2 and a communication terminal 3 connected to the telephone 4. The core network 6 has an MME (Mobility Management Entity) 61, an SGW (Serving Gateway) 62, a PGW (Packet data network Gateway) 63, a PCRF (Policy and Charging Rule Function) 64, and the like, and controls the base station 51 and voice. Realize a call and a connection with an external network 8 such as the Internet.

The MME 61 has a sequence control function, a position management function when the mobile phone 2 is in the standby state, a paging function for the base station 51 when an incoming call is received from another mobile phone 2 or the phone 4, and authentication management of the mobile phone 2. It has a function and the like. In the sequence control function, for example, the communication path of user data is set for the base station 51, the SGW 62, or the like. In this way, the MME 61 functions as an exchange that controls the establishment and disconnection of voice communication of the mobile phone 2.

The SGW 62 is a packet gateway that houses the base station 51. The SGW 62 has a function of transmitting user data and the like, and serves as a connection point for switching a user data transfer path with a wireless network of another communication standard (3G or the like) in the core network 6.

The PGW 63 is a packet gateway that connects to the external network 8 or the IMS (IP Multimedia Subsystem). The PGW 63 serves as a connection point with a packet network (PDN) such as IMS, has a function of assigning an IP address to the mobile phone 2 and the communication terminal 3, the mobile phone 2 has LTE wireless access, and a non-3GPP such as CDMA2000. It has a user data transfer function when moving between (Third Generation Partnership Project).

PCRF64 determines policy control and billing control rules such as QoS (Quality of Service), and instructs SGW62 and PGW63 of policy control and billing control. PCRF64 controls SGW62 and PGW63 while realizing establishment and release of voice bearer in cooperation with IMS when using voice call by IMS. In policy control, for example, a packet having a high priority (voice packet or the like) is controlled to be prioritized over browsing the Internet.

The HSS (Home Subscriber Server) 7 manages the subscriber information of the mobile communication network. The HSS 7 stores profile information, identifiers, service profiles, and the like of the user who owns the mobile phone 2 and the communication terminal 3. The HSS 7 may store the mobile phone number of the communication terminal 3 in association with the telephone number of the telephone 4 to which the communication terminal 3 is connected.

The control server 9 is connected to the PGW 63, and stores, for example, conversation information between the mobile phones 2 when the mobile phones 2 are performing voice communication. Further, the control server 9 executes the risk level determination process and the risk response process described later.

(Mobile phone 2)
FIG. 3 is a diagram showing an example of a schematic configuration of the mobile phone 2.

The mobile phone 2 is, for example, a communication terminal that enables voice communication with another mobile phone 2 or a fixed telephone, and has a communication function by wireless LAN. The mobile phone 2 is a multifunctional mobile phone (so-called "smartphone"). The mobile phone 2 may be a mobile phone (so-called “feature phone”), a mobile information terminal (Personal Digital Assistant, PDA), a tablet terminal, a tablet PC, or the like. Further, the mobile phone 2 may be a portable game machine, a portable music player, a notebook PC, or the like.

The mobile phone 2 includes, for example, a first mobile communication unit 21, a second mobile communication unit 22, a mobile storage unit 23, an operation unit 24, a display unit 25, a voice processing unit 26, a microphone 27, a speaker 28, and a mobile processing unit 29. To be equipped.

The first mobile communication unit 21 has a communication interface circuit including an antenna having an antenna mainly in a 2.1 GHz band, a 5 GHz band, or the like, and uses an IEEE802.11 standard wireless communication system with the base station 51. Wireless communication is performed based on this. Then, the first mobile communication unit 21 supplies the data received from the base station 51 to the mobile processing unit 29. In addition, the first mobile communication unit 21 transmits the data supplied from the mobile processing unit 29 to the base station 51.

The second mobile communication unit 22 has a communication interface circuit including an antenna having a sensitivity band mainly in the 2.5 GHz band, and connects the mobile phone 2 to the mobile phone network. The second mobile communication unit 22 establishes a wireless signal line by the LTE method or the like with the base station 51 via the channel assigned by the base station 51, and communicates with the base station 51. Then, the second mobile communication unit 22 supplies the data received from the base station 51 to the mobile processing unit 29. Further, the second mobile communication unit 22 transmits the data supplied from the mobile processing unit 29 to the base station 51.

The portable storage unit 23 includes, for example, a semiconductor memory device such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The mobile storage unit 23 stores an operating system program, a driver program, an application program, data, and the like used for processing in the mobile processing unit 29. The driver programs stored in the mobile storage unit 23 are a wireless communication device driver program that controls the first mobile communication unit 21, a mobile phone communication device driver program that controls the second mobile communication unit 22, and an input that controls the operation unit 24. A device driver program, an output device driver program that controls the display unit 25, an output device driver program that controls the display unit 25, the voice processing unit 26, the microphone 27, and the speaker 28. The application program stored in the mobile storage unit 23 is, for example, a program for executing mail transmission / reception processing and display processing. Various programs stored in the portable storage unit 23 may be installed in the portable storage unit 23 from, for example, an external server device or the like using a known setup program or the like. In addition, the portable storage unit 23 may temporarily store temporary data related to a predetermined process.

The operation unit 24 is, for example, a pointing device such as a touch panel. The operation unit 24 may be any device as long as the mobile phone 2 can be operated, and may be a keypad, for example. The user can use the operation unit 24 to input characters, numbers and symbols, or the position of the display unit 25 on the display screen. When the operation unit 24 is operated by the user, the operation unit 24 generates a signal corresponding to the operation. Then, the generated signal is supplied to the mobile processing unit 29 as a user's instruction.

The display unit 25 is a liquid crystal display. The display unit 25 may be an organic EL (Electro-Luminescence) display or the like. The display unit 25 displays an image corresponding to the image data supplied from the portable processing unit 29, an image corresponding to the image data, and the like.

The voice processing unit 26 processes the voice signal input to the microphone 27 and the voice signal output from the speaker 28.

The portable processing unit 29 includes one or more processors and peripheral circuits thereof. The mobile processing unit 29 comprehensively controls the overall operation of the mobile phone 2, and is, for example, a CPU (Central Processing Unit). The mobile processing unit 29 executes various information processing in an appropriate procedure based on the program stored in the mobile storage unit 23 and various instructions input in response to the operation of the operation unit 24 by the user, and Controls the operation of the display unit 25. The mobile processing unit 29 executes various information processing based on the operating system program, the driver program, and the control program stored in the mobile storage unit 23. In addition, the portable processing unit 29 can execute a plurality of programs in parallel.

The portable processing unit 29 includes at least a receiving unit 291 and a display processing unit 292. Each of these parts is a functional module realized by a program executed by a processor included in the portable processing unit 29. Alternatively, each of these parts may be mounted on the mobile phone 2 as firmware.

(Communication terminal 3)
FIG. 4 is a diagram showing an example of a schematic configuration of the communication terminal 3.

The communication terminal 3 is connected to a telephone 4 owned by a user who can be a fraudulent person such as an elderly person, and has a communication function capable of voice communication between the telephone 4 and another mobile phone 2 or a fixed telephone. It is a terminal. The communication terminal 3 stores an IC card that stores a mobile phone number and user identification information managed by a specific mobile communication operator, and is connected to a mobile communication network managed by the specific mobile communication operator. It is a communication module that can be connected.

The communication terminal 3 includes, for example, a first terminal communication unit 31, a second terminal communication unit 32, a terminal storage unit 33, and a terminal processing unit 34.

The first terminal communication unit 31 includes a modular jack (for example, RJ (Registered Jack) -11) and is connected to the telephone 4 via a modular cable.

The second terminal communication unit 32 has a communication interface circuit including an antenna having a sensitivity band mainly in the 2.5 GHz band, and connects the communication terminal 3 to the mobile phone network. The second terminal communication unit 32 establishes a wireless signal line by the LTE method or the like with the base station 51 via the channel assigned by the base station 51, and communicates with the base station 51. Then, the second terminal communication unit 32 supplies the voice packet received from the base station 51 to the terminal processing unit 34. Further, the second terminal communication unit 32 transmits the voice packet supplied from the terminal processing unit 34 to the base station 51.

The terminal storage unit 33 includes, for example, a semiconductor memory device such as a ROM or RAM. The terminal storage unit 33 stores an operating system program, a driver program, a control program, data, and the like used for processing in the terminal processing unit 34. The driver program stored in the terminal storage unit 33 is a voice communication device driver program that controls the first terminal communication unit 31, a mobile phone communication device driver program that controls the second terminal communication unit 32, and the like. The control program stored in the terminal storage unit 33 is, for example, a program for executing a process of converting a voice signal into a voice packet. Various programs stored in the terminal storage unit 33 may be installed in the terminal storage unit 33 from, for example, an external server device or the like using a known setup program or the like. Further, the terminal storage unit 33 may temporarily store temporary data related to a predetermined process.

The terminal processing unit 34 includes one or more processors and peripheral circuits thereof. The terminal processing unit 34 controls the overall operation of the communication terminal 3 in an integrated manner, and is, for example, a CPU. The terminal processing unit 34 executes various information processing in an appropriate procedure based on various instructions and the like input according to the program stored in the terminal storage unit 33. The terminal processing unit 34 executes various information processing based on the operating system program, the driver program, and the control program stored in the terminal storage unit 33. The terminal processing unit 34 executes, for example, a process of converting a voice signal into a voice packet and a process of converting a voice packet into a voice signal. In addition, the terminal processing unit 34 can execute a plurality of programs in parallel.

(Control server 9)
FIG. 5 is a diagram showing an example of a schematic configuration of the control server 9.

The server communication unit 91 has a communication interface circuit for connecting the control server 9 to the core network 6 of the mobile communication network. The server communication unit 91 receives the voice packet transmitted from the mobile phone 2 and the communication terminal 3 via the wireless network 5 and the core network 6. Further, the server communication unit 91 transmits a voice packet to the mobile phone 2 and the communication terminal 3 via the core network 6 and the wireless network 5. The server communication unit 91 transmits the data received from the server processing unit 93 to the mobile phone 2 via the core network 6 and the wireless network 5.

The server storage unit 92 has, for example, at least one of a semiconductor memory, a magnetic tape device, a magnetic disk device, and an optical disk device. The server storage unit 92 stores application programs, data, and the like used for processing in the server processing unit 93. The data stored in the server storage unit 92 is, for example, a phrase table and a telephone number table described later, document information indicating that a special fraud has occurred, and the like. Further, the server storage unit 92 may temporarily store temporary data related to a predetermined process.

The server processing unit 93 includes one or more processors and peripheral circuits thereof. The server processing unit 93 is a processing unit that comprehensively controls the overall operation of the control server 9, for example, a CPU. The server processing unit 93 executes various processes of the control server 9 in an appropriate procedure according to the program stored in the server storage unit 92, and controls the operation of the server communication unit 91. The server processing unit 93 executes processing based on a program (operating system program, application program, etc.) stored in the server storage unit 92. Further, the server processing unit 93 can execute a plurality of programs (application programs, software, etc.) in parallel.

The server processing unit 93 includes at least a server receiving unit 931, a storage processing unit 932, a counting unit 933, a determination unit 934, and a server transmitting unit 935. Each of these units included in the server processing unit 93 is a functional module implemented by an application program executed on the processor included in the server processing unit 93. Alternatively, each of these units included in the server processing unit 93 may be mounted on the control server 9 as firmware.

Hereinafter, an example of a phrase table and a telephone number table stored in the server storage unit 92 will be described with reference to FIG.

(Word table)
FIG. 6A is a diagram showing an example of a data structure of a phrase table that manages a plurality of specific phrases used in special fraud. In the phrase table, phrase IDs, character information, and the like are stored in association with each other for each specific phrase.

The word / phrase ID is identification information for uniquely identifying each of a plurality of specific words / phrases.

Character information is text information indicating each of a plurality of specific words and phrases. The character information may be voice information indicating each of a plurality of specific words and phrases.

(Telephone number table)
FIG. 6B is a diagram showing an example of a data structure of a telephone number table that manages registered telephone numbers registered by a user or the like in order to prevent special fraud. In the telephone number table, registered telephone numbers, judgment histories, e-mail addresses, etc. are stored in association with each other.

The registered telephone number is a telephone number of a telephone that is a target for preventing special fraud, and is, for example, a telephone number of a mobile phone 2 and a telephone number of a communication terminal 3. The registered telephone number may be stored in HSS 7.

As the determination history, the communication start time at which the risk determination process described later is started and the risk determined by the risk determination process are stored in association with each other.

The e-mail address is the e-mail address of the mobile phone 2 regarding the user. The mobile phone 2 related to the user is owned by, for example, the family of the user of the mobile phone 2 or the communication terminal 3 corresponding to the registered telephone number. The mobile phone 2 relating to the user may be owned by another user (such as an employee of a public institution) registered by the user.

Hereinafter, the server receiving unit 931, the storage processing unit 932, the counting unit 933, the determination unit 934, and the server transmitting unit 935, which the server processing unit 93 has, will be described.

(Server receiver 931)
The server receiving unit 931 acquires the telephone number information of the telephones of 2 for which voice communication has been established, which is received from the core network 6. When the telephone for which voice communication has been established is the telephone 4 connected to the communication terminal 3, the telephone number received from the core network 6 is the mobile phone number of the communication terminal 3.

Further, when the telephone number indicated by the acquired telephone number information is included in the registered telephone number stored in the telephone number table, the server receiving unit 931 uses the voice information of the conversation between the telephones for which voice communication has been established. , Received from core network 6.

(Memory processing unit 932)
When the telephone number indicated by the telephone number information acquired by the server receiving unit 931 is included in the registered telephone number stored in the telephone number table, the storage processing unit 932 determines the conversation between the telephones for which voice communication has been established. The voice information is stored in the server storage unit 92 as conversation information. The storage processing unit 932 stores the start time of voice communication in the determination history of the telephone number table in association with the registered telephone number stored in the telephone number table.

Further, when the current time reaches a predetermined acquisition time, the storage processing unit 932 acquires the conversation information stored in the server storage unit 92. The predetermined acquisition time is, for example, the time elapses every 10 seconds after the voice communication is established (10 seconds, 20 seconds, 30 seconds, ...) After the voice communication is established. .. In this way, the storage processing unit 932 acquires conversation information at each of the plurality of predetermined acquisition times after the voice communication is established.

(Counting unit 933)
Each time the conversation information is acquired by the storage processing unit 932, the counting unit 933 extracts a phrase table from the server storage unit 92, and based on the acquired conversation information and the extracted phrase table, the conversation shown in the conversation information is created. Count the number of included character information stored in the phrase table. Hereinafter, an example of counting processing by the counting unit 933 will be described.

For example, the counting unit 933 uses known speech recognition processing to identify phonemes from the acquired conversation information in chronological order, and estimates words in Japanese or another language based on the identified phonemes. Next, the counting unit 933 determines whether or not the estimated phrase matches the character information stored in the phrase table. Then, when the determination of whether or not all the words in the conversation information match the character information stored in the word table is completed, the counting unit 933 determines that the words match the character information stored in the word table. Counts the number of words and ends the counting process.

The voice recognition process used by the counting unit 933 may be executed by an AI (Artificial Intelligence) program stored in the server storage unit 92. For example, the counting unit 933 uses a neural network model or the like learned based on teacher data including text information (input data) based on the voice generated by the fraudster and “special fraud” (output data). The counting unit 933 may calculate a numerical value of the possibility of special fraud of the acquired conversation information. In this case, the counting unit 933 outputs a numerical value of the possibility of special fraud to the determination unit 934 instead of the counted number.

(Judgment unit 934)
The determination unit 934 determines whether the number counted by the counting unit 933 is less than "5", "5" or more and less than "20", or "20" or more. The threshold value used by the determination unit 934 is not limited to "5" and "20". For example, the determination unit 934 may use three threshold values of "10", "20", and "30". Further, the determination unit 934 may use four threshold values of "5", "10", "15" and "20". As described above, the number of threshold values used by the determination unit 934 may be one or a plurality, and the threshold value may be any value.

Further, the determination unit 934 sets the risk level according to the number counted by the counting unit 933, and associates the set risk level with the registered telephone number and the communication start time of the conversation information in the determination history of the telephone number table. Remember in. For example, when the threshold values are "5" and "20", the determination unit 934 sets the risk level to 0 and counts by the counting unit 933 if the number counted by the counting unit 933 is less than "5". If the number is "5" or more and less than "20", the risk level is set to 1, and if the number counted by the counting unit 933 is "20" or more, the risk level is set to 2. If the number of threshold values is 3, any of 0 to 3 is set as the risk level. As a result, the determination unit 934 can determine the degree of risk for the registered telephone number and the conversation information according to the number counted by the counting unit 933.

(Server transmitter 935)
When the determination unit 934 stores a risk level different from the risk level already stored in the judgment history (when changing the risk level), the server transmission unit 935 performs a transmission process according to the newly stored risk level. Execute. For example, when the server transmission unit 935 newly stores the risk level "1" from the risk level "0" already stored in the judgment history, the risk level "0" stored in the judgment history is set to the risk level "1". Change to and store it in the judgment history, and execute the mail transmission process. In the mail transmission process, the server transmission unit 935 extracts the email address associated with the registered telephone number stored in the telephone number table, and indicates that a special fraud stored in the server storage unit 92 has occurred. Extract the document information to be shown. Then, the server transmission unit 935 transmits an e-mail containing the extracted document information to the extracted e-mail address.

For example, when the server transmission unit 935 newly stores the risk level "2" from the risk level "1" already stored in the judgment history, the risk level "1" stored in the judgment history is changed to the risk level "2". It is changed to and stored in the judgment history, and the voice communication disconnection instruction transmission process is executed. In the voice communication disconnection instruction, the server transmission unit 935 determines an exchange (MME or the like) that controls the voice communication related to the conversation information, and transmits a voice communication disconnection instruction for disconnecting the voice communication to the determined exchange. .. In this case, the above-mentioned mail transmission process may be executed at the same time.

When the determined risk level is any of 0 to 3, for example, when the server transmission unit 935 newly stores the risk level "3" from the risk level "2" already stored in the judgment history. , Voice communication disconnection instruction and report processing to the police station are executed at the same time.

(Danger level judgment processing)
FIG. 7 is a diagram showing an example of an operation flow of the risk determination process by the storage processing unit 932, the counting unit 933, and the determination unit 934 of the control server 9. This risk determination process is executed mainly by the server processing unit 93 in cooperation with each element of the control server 9 based on the control program stored in the storage unit 43 in advance. The risk determination process shown in FIG. 7 is started when the telephone number information of the two telephones for which voice communication has been established is included in the registered telephone number stored in the telephone number table.

The storage processing unit 932 determines whether or not the current time has reached a predetermined acquisition time (step S101).

When the storage processing unit 932 determines that the current time has not reached the predetermined acquisition time (step S101-No), the storage processing unit 932 returns the processing to step S101.

When it is determined that the current time has reached a predetermined acquisition time (step S101-Yes), the storage processing unit 932 acquires the conversation information stored in the server storage unit 92 (step S102).

The counting unit 933 extracts the phrase table from the server storage unit 92, and based on the acquired conversation information and the extracted phrase table, the character information (phrase) stored in the phrase table included in the conversation shown in the conversation information. Count the number of (step S103).

The determination unit 934 determines whether or not the number counted in step S103 is less than 5 (step S104).

When the number counted in step S103 is less than 5 (step S104-Yes), the determination unit 934 sets the risk level to 0 (step S105) and proceeds to step S109.

When the number counted in step S103 is 5 or more (step S104-No), the determination unit 934 determines whether or not the number counted in step S103 is less than 20 (step S106).

When the number counted in step S103 is less than 20 (step S106-Yes), the determination unit 934 sets the risk level to 1 (step S107) and proceeds to step S109.

When the number counted in step S103 is 20 or more (step S106-No), the determination unit 934 sets the risk level to 2 (step S108) and proceeds to step S109.

Next, the determination unit 934 determines whether or not the conversation information has ended (step S109).

When the determination unit 934 determines that the conversation information has not been completed (step S109-No), the determination unit 934 returns the process to step S101.

When the determination unit 934 determines that the conversation information is completed (step S109-Yes), the determination unit 934 ends the risk determination process.

(Danger response processing)
FIG. 8 is a diagram showing an example of the operation flow of the risk handling process by the determination unit 934 of the control server 9 and the server transmission unit 935. When the risk determination process shown in FIG. 7 is executed, the risk response process shown in FIG. 8 is executed in parallel with the risk determination process.

The determination unit 934 determines whether or not the risk level has been changed (step S201).

When the determination unit 934 determines that the risk level has not been changed (step S201-No), the determination unit 934 ends the risk level response process.

When the determination unit 934 determines that the risk level has been changed (step S201-Yes), whether or not the stored risk level is "1" (whether the risk level has been changed from "0" to "1"). Whether or not) is determined (step S202).

When it is determined that the stored risk level is "1" (step S202-Yes), the server transmission unit 935 commits a predetermined special fraud to the e-mail address stored in the telephone number table. An e-mail including document information indicating that the occurrence has occurred is transmitted (step S203), and the risk level handling process is terminated.

When it is determined that the stored risk level is not "1" (when the stored risk level is determined to be "2") (step S202-No), the server transmission unit 935 gives an instruction to disconnect the voice communication. Is transmitted to the exchange (step S204), and the risk level handling process is completed.

As described in detail above, in the prevention system 1 of the present embodiment, the number of specific words and phrases used in special fraud is counted based on the conversation information stored by the control server 9, and the number is increased according to the counted number. The risk response process is executed. In this way, the prevention system 1 of the present embodiment makes it possible to prevent special fraud without involving a party of special fraud such as a user of a registered telephone.

(Modification example 1)
The present invention is not limited to the present embodiment. For example, the server storage unit 92 stores voice information (such as "this conversation is recorded") to record a conversation during a call and information on a fraudulent telephone whose risk level has been determined in the past, and stores the server. When the fraudulent telephone requests voice communication with the registered telephone, the transmission unit 935 may transmit the voice information as a ringing tone to the fraudulent telephone. As a result, it is possible to alert the user of the telephone, which has a high probability of committing a special fraud in the past, to execute the fraud, and to prevent the special fraud in advance. The above-mentioned process may be executed on a fraudulent telephone that is determined to have a risk level of a predetermined value or higher (for example, a risk level of "2" or higher).

Further, the server storage unit 92 stores voice information for recording a conversation during a call and information on a fraudulent telephone whose risk level has been determined in the past, and the server transmission unit 935 stores the registered telephone from the fraudulent telephone. When a voice communication with is requested (outgoing) and a connection with a fraudulent telephone is requested (off-hook) from the registered telephone, voice information may be transmitted to the fraudulent telephone as a ringing tone. Further, in this case, the server transmission unit 935 voices when the fraudulent telephone requests (off-hook) the connection with the registered telephone when the registered telephone requests (calls) voice communication with the fraudulent telephone. Information may be sent to fraudulent phones.

In addition, the server storage unit 92 records the first voice information ("Please tell me your name", etc.) to inquire about the name and the second voice information ("This conversation is recorded") to record the conversation during the call. "Etc.) may be memorized. In this case, the server transmission unit 935 receives the first voice when the fraudulent telephone requests (calls) voice communication with the registered telephone and the registered telephone requests (off-hook) the connection with the fraudulent telephone. Send information to fraudulent phones. The storage processing unit 932 stores in the server storage unit 92 the voice information generated from the fraudulent telephone (for example, voice information with a given name) during a predetermined recording period (for example, 10 seconds) after the transmission of the first voice information. To do. When the server transmission unit 935 transmits the generated voice information and the second voice information to the fraudulent telephone and also transmits the live voice information to the registered telephone and acquires the connection instruction information (signal by off-hook) from the registered telephone, the registered telephone An instruction to establish voice communication with the fraudulent telephone may be sent to the exchange. In this way, the user of the fraudulent telephone receives a notification that the conversation is recorded after listening to the voice or the like that he / she claims to be. As a result, it is possible to alert the other party to the execution of fraud, and it is possible to prevent special fraud in advance. In addition, the user of the registered telephone can determine whether or not to perform voice communication by telephone after listening to the voice or the like giving his / her name. As a result, the user of the registered telephone can be alerted to the execution of fraud, and special fraud can be prevented in advance.

(Modification 2)
Further, the control server 9 may be connected to a switchboard used for public circuit switching. In this case, the control server 9 is connected to the Internet network. In the mail transmission process, the server transmission unit 935 transmits a mail including document information indicating that a special fraud has occurred via the Internet network. In the voice communication disconnection instruction transmission process, the server transmission unit 935 transmits a voice communication disconnection instruction for disconnecting the voice communication to the exchange connected to the control server 9.

(Modification 3)
Further, in step S203, the server transmission unit 935 performs a process of transmitting an e-mail including document information indicating that a special fraud has occurred, and also performs a warning voice transmission process of transmitting a warning voice to the registered telephone. May be good. In this case, the server storage unit 92 stores a warning voice (“the current call may be a crime”, etc.) indicating the possibility of special fraud. In the warning voice transmission process, for example, the server transmission unit 935 transmits a ring tone to the registered telephone after the voice communication between the registered telephone and the fraudulent telephone is disconnected. Then, when the voice communication between the registered telephone and the control server 9 is established, the server transmission unit 935 reads the warning voice stored in the server storage unit 92 and transmits the read warning voice to the registered telephone.

In this way, the prevention system 1 can further alert the user of the registered telephone to the execution of fraud, and can prevent special fraud in advance.

(Modification example 4)
Further, in step S204, the server transmission unit 935 may transmit the voice communication establishment instruction for establishing the voice communication between the fraudulent telephone and the telephone in the specific police agency to the exchange together with the voice communication disconnection instruction. In this case, the server storage unit 92 stores the telephone number of the telephone in the specific police agency. Then, the server transmission unit 935 transmits a voice communication establishment instruction to the exchange based on the telephone number of the telephone in the specific police agency stored in the server storage unit 92.

In this way, the prevention system 1 can alert the user of the registered telephone to the execution of fraud, and makes it possible to prevent special fraud more reliably in advance.

1 Prevention system 2 Mobile phone 21 1st mobile communication unit 22 2nd mobile communication unit 23 Mobile storage unit 24 Operation unit 25 Display unit 26 Voice processing unit 27 Microphone 28 Speaker 29 Mobile processing unit 291 Reception unit 292 Display processing unit 3 Communication terminal 31 1st terminal communication unit 32 2nd terminal communication unit 33 Terminal storage unit 34 Terminal processing unit 4 Telephone 5 Wireless network 51 Base station (eNodeB)
6-core network 61 MME (Mobility Management Entity)
62 SGW (Serving Gateway)
63 PGW (Packet data network Gateway)
64 PCRF (Policy and Charging Rule Function)
7 HSS (Home Subscriber Server)
8 External network 9 Control server 91 Server communication unit 92 Server storage unit 93 Server processing unit 931 Server receiving unit 932 Storage processing unit 933 Counting unit 934 Judgment unit 935 Server transmission unit

Claims (8)

A storage unit that stores telephone number information regarding a registered telephone number registered by a user, phrase information regarding a plurality of specific phrases used in special fraud, and a warning voice suggesting the possibility of the special fraud. ,
When voice communication between the first telephone corresponding to the registered telephone number and the second telephone different from the first telephone is established, the conversation information regarding the conversation between the first telephone and the second telephone is stored. A storage processing unit that stores in the unit and
A counting unit that acquires the conversation information from the storage unit and counts the number of the specific words and phrases included in the conversation each time a predetermined time elapses after the voice communication is established.
A determination unit that determines the degree of risk for the conversation based on the counted number,
When the risk level exceeds the first predetermined value, an email indicating that the special fraud has occurred is sent to the mobile terminal related to the user, and voice communication between the first telephone and the second telephone is performed. After being disconnected, a ringing tone is transmitted to the first telephone, and when voice communication with the first telephone is established, the warning voice is transmitted to the first telephone.
When the degree of risk exceeds a second predetermined value larger than the first predetermined value, instruction information for disconnecting the voice communication between the first telephone and the second telephone is transmitted to the switchboard related to the voice communication. Department and
A server device characterized by comprising. When the risk level exceeds the second predetermined value, which is larger than the first predetermined value, the transmitter disconnects the voice communication between the first telephone and the second telephone, and is specific to the second telephone. The server device according to claim 1, wherein instruction information for establishing voice communication with a telephone in a police agency is transmitted to the exchange related to the voice communication. The storage unit stores voice information for recording a conversation during a call and information on a second telephone whose risk level has been determined in the past.
The transmission unit transmits the voice information as a ringing tone to the second telephone when the second telephone whose risk level has been determined in the past requests voice communication with the first telephone. The server device described in. The storage unit stores voice information for recording a conversation during a call and information on a second telephone whose risk level has been determined in the past.
When the second telephone whose risk level has been determined in the past requests voice communication with the first telephone, the transmitter is requested to connect to the second telephone by the first telephone. The server device according to claim 1, wherein the voice information is transmitted to the second telephone. The storage unit stores voice information for recording a conversation during a call and information on a second telephone whose risk level has been determined in the past.
When the first telephone requests voice communication with the second telephone whose risk level has been determined in the past, the transmitter is requested to connect to the first telephone by the second telephone. The server device according to claim 1, wherein the voice information is transmitted to the second telephone. The storage unit stores the first voice information for inquiring the name and the second voice information for recording the conversation during the call.
When the second telephone requests voice communication with the first telephone and the first telephone requests a connection with the second telephone, the transmitter transmits the first voice information. Send to the second phone,
The storage processing unit stores the voice information generated from the second telephone in a predetermined recording period after the transmission of the first voice information in the storage unit.
The transmission unit transmits the generated voice information and the second voice information to the second telephone, and transmits the generated voice information to the first telephone.
The server device according to claim 1, wherein when the connection instruction information is acquired from the first telephone, an instruction for establishing voice communication between the first telephone and the second telephone is transmitted to the exchange. A control program for a server device that has a storage unit.
The telephone number information regarding the registered telephone number registered by the user, the phrase information regarding a plurality of specific words and phrases used in the special fraud, and the warning voice suggesting the possibility of the special fraud are stored in the storage unit. And
When voice communication between the first telephone corresponding to the registered telephone number and the second telephone different from the first telephone is established, the conversation information regarding the conversation between the first telephone and the second telephone is stored. Remember in the club,
Every time a predetermined time elapses after the voice communication is established, the conversation information is acquired from the storage unit, and the number of the specific words and phrases contained in the conversation is counted.
The degree of risk to the conversation is determined based on the counted number.
When the risk level exceeds the first predetermined value, an email indicating that the special fraud has occurred is sent to the mobile terminal related to the user, and voice communication between the first telephone and the second telephone is performed. After being disconnected, a ringing tone is transmitted to the first telephone, and when voice communication with the first telephone is established, the warning voice is transmitted to the first telephone.
When the degree of risk exceeds a second predetermined value larger than the first predetermined value, instruction information for disconnecting the voice communication between the first telephone and the second telephone is transmitted to the exchange related to the voice communication.
A control program for causing the server device to execute this. A control method for a server device that has a storage unit.
The telephone number information regarding the registered telephone number registered by the user, the phrase information regarding a plurality of specific words and phrases used in the special fraud, and the warning voice suggesting the possibility of the special fraud are stored in the storage unit. And
When voice communication between the first telephone corresponding to the registered telephone number and the second telephone different from the first telephone is established, the conversation information regarding the conversation between the first telephone and the second telephone is stored. Remember in the club,
Every time a predetermined time elapses after the voice communication is established, the conversation information is acquired from the storage unit, and the number of the specific words and phrases contained in the conversation is counted.
The degree of risk to the conversation is determined based on the counted number.
When the risk level exceeds the first predetermined value, an email indicating that the special fraud has occurred is sent to the mobile terminal related to the user, and voice communication between the first telephone and the second telephone is performed. After being disconnected, a ringing tone is transmitted to the first telephone, and when voice communication with the first telephone is established, the warning voice is transmitted to the first telephone.
When the degree of risk exceeds a second predetermined value larger than the first predetermined value, instruction information for disconnecting the voice communication between the first telephone and the second telephone is transmitted to the exchange related to the voice communication.
A control method characterized by including.

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