JP2016149636A - Authentication apparatus, telephone terminal, authentication method and authentication program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an authentication apparatus capable of preventing spoofing by swiftly carrying out an authentication of a caller based on a telephone call with a calling terminal.SOLUTION: An authentication apparatus 1 includes: registered personal data registration means 24 that stores a voiceprint data of a relevant person of a receiver of a reception terminal 3 in a storage unit 10 as a registered person voiceprint data 15; caller voice data conversion means 22 that generates a caller voiceprint data 12 from the voice data in a telephone call from a calling terminal 2; and authentication means that compares the caller voiceprint data 12 and the registered person voiceprint data 15, and when the data match with each other, notifies that the caller of the calling terminal 2 is a relevant person.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an authentication device, a telephone terminal, an authentication method, and an authentication program for authenticating a caller.

  In recent years, so-called “transfer fraud” using telephones has increased and has become a social problem. A transfer fraud is a fraud in which elderly people are called, impersonate a child or grandchild, explain a difficult situation, claim that money is necessary, and illegally earn money. In this scam, it has been made malicious by clever stories and performances, and techniques to prevent it have been developed.

  For example, for a call received at a representative telephone number, the voice print data extracted from the caller's voice is compared with the voice print data of a transfer refusal person registered in advance, and based on the degree of match of the voice print data, There is a method for determining whether or not to transfer to a telephone (see, for example, Patent Document 1). In this method, even if a call is retransmitted from the transfer refusal person, the call is not transferred to the receiver side, so that reception from the transfer refusal person can be avoided reliably.

  Also, fraud information such as fraudster's voice data, account information, keywords, etc. is registered in the database in advance, and it is determined whether or not it is a transfer fraud by collating with the call voice data transmitted from the receiving terminal. There is also a method of transmitting to (for example, see Patent Document 2). According to this method, fraud can be determined not only by the fraudster's voice data but also by peripheral information such as account information and keywords.

JP 2003-264857 A JP 2008-210085 A

  However, since the methods described in Patent Document 1 and Patent Document 2 both register the voice data of transfer refusal persons and fraudsters as blacklists, new transfer refusal persons and fraudsters are not registered with other methods. It is not possible to cope with changes to a person.

  Further, in the method described in Patent Document 1, when the receiver recognizes the caller as a transfer refusal person during a call, the voiceprint data of the caller is registered, and thereafter, even if there is a call from the same caller , Control not to be forwarded to the recipient. Therefore, it is necessary for the receiver to determine whether or not he / she is a transfer refusal person in the first call, which causes a burden on the receiver and cannot avoid the first call. Cannot be prevented.

  In addition, the method described in Patent Document 2 requires that the fraudster's voice data and the like are comprehensively registered in advance in the database. Therefore, a large amount of fraud information collected by the police and the like is collected in synchronization. , Collate. Therefore, in this method, the processing burden on the database is large, and it may take time to collate, and notification of the determination result to the receiver may be delayed.

  Accordingly, an object of the present invention is to provide an authentication device, a telephone terminal, an authentication method, and an authentication program for quickly authenticating a caller based on a call with a calling terminal and preventing spoofing.

  In order to solve the above-described problem, a first feature of the present invention relates to an authentication device that authenticates a caller based on a call between a calling terminal and a receiving terminal. An authentication apparatus according to a first aspect of the present invention includes a registrant data registration unit that stores voice print data of a party related to a recipient of a receiving terminal in a storage device as registrant voice print data, and voice in a call from a calling terminal. From the data, the caller voice data conversion means for generating the caller voice print data is compared with the caller voice print data and the registrant voice print data, and if they match, it is notified that the caller of the caller terminal is a related party Authentication means is provided.

  Here, the storage device further stores keyword data including keywords expected to appear frequently in a call when the caller impersonates a related person for fraud, and the caller voice data conversion means further transmits the call. The caller text data is generated from the phone call, and the authentication means determines that if the caller voice print data and the registrant voice print data do not match, and if the caller text data contains a keyword, the caller is fraudulent. You may be notified that it is impersonation for.

  Further, a call processing control means for controlling a three-party call between the transmitting terminal and the receiving terminal may be provided according to a three-party call request from the receiving terminal.

  A second feature of the present invention relates to a telephone terminal that receives a call from a calling terminal and authenticates the caller based on a call with the calling terminal. The telephone terminal according to the second aspect of the present invention comprises a registrant data registration means for storing voice print data of a party related to a recipient of the telephone terminal in a storage device as registrant voice print data, and voice in a call from the calling terminal. From the data, the caller voice data conversion means for generating the caller voice print data is compared with the caller voice print data and the registrant voice print data, and if they match, it is notified that the caller of the caller terminal is a related party Authentication means is provided.

  A third feature of the present invention relates to an authentication method in which an authentication device authenticates a caller based on a call between a calling terminal and a receiving terminal. In the authentication method according to the third aspect of the present invention, the authentication device stores the voice print data of the parties related to the recipient of the receiving terminal in the storage device as registrant voice print data; Generating caller voice print data from the voice data in the phone call, and the authentication device compares the caller voice print data with the registrant voice print data, and if they match, the caller of the caller terminal is a participant. A step of notifying that.

  Here, the authentication device stores in the storage device keyword data including keywords that are expected to appear frequently in a call when the caller impersonates a related person for fraud, and the authentication device If the step of generating caller text data from the terminal call and the authentication device does not match the caller voice print data and the registrant voice print data, and if the caller text data contains a keyword, the caller May further comprise a step of notifying that it is impersonation for fraud.

  A fourth feature of the present invention relates to an authentication method in which a telephone terminal receives a call from a calling terminal and authenticates the caller based on a call with the calling terminal. According to a fourth aspect of the present invention, there is provided an authentication method in which a telephone terminal stores voice print data of a related party of a receiver of the telephone terminal in a storage device as registrant voice print data; Generating caller voiceprint data from the voice data in the phone call and the phone terminal compares the caller voiceprint data with the registrant voiceprint data, and if they match, the caller of the caller terminal is a participant A step of notifying that.

  A fifth feature of the present invention relates to an authentication program for causing a computer to function as the means described in the first feature or the second feature of the present invention.

  According to the present invention, it is possible to provide an authentication device, a telephone terminal, an authentication method, and an authentication program for quickly authenticating a caller based on a call with a calling terminal and preventing spoofing.

It is a figure explaining the system configuration | structure of the telephone call system which concerns on embodiment of this invention, the hardware configuration of an authentication apparatus, and a functional block. It is a sequence diagram explaining the process in which an authentication apparatus authenticates the telephone call from a transmission terminal in the telephone system which concerns on embodiment of this invention. It is a sequence diagram explaining the process in which an authentication apparatus registers the voiceprint data of an interested person in the telephone call system which concerns on embodiment of this invention. It is a flowchart explaining the authentication process by the authentication apparatus which concerns on embodiment of this invention. It is a figure explaining the system configuration | structure of the telephone system which concerns on a 1st modification, the hardware configuration of an authentication apparatus, and a functional block. It is a figure explaining the system configuration | structure of the telephone call system which concerns on a 2nd modification, the hardware configuration of an authentication apparatus, and a functional block. It is a flowchart explaining the authentication process by the authentication apparatus which concerns on a 2nd modification.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

(Calling system)
A call system 5 according to an embodiment of the present invention will be described with reference to FIG. The call system 5 according to the embodiment of the present invention makes it possible to prevent this fraud when the caller makes a call to the receiving terminal 3 while pretending to be a party related to the recipient and performs a transfer fraud.

  The call system 5 includes an authentication device 1, transmission terminals 2a and 2b, and a reception terminal 3. The authentication device 1, the transmission terminals 2a and 2b, and the reception terminal 3 are connected to each other so as to be able to talk to each other by a call network 4 by circuit switching.

  The authentication device 1 authenticates the caller based on the call between the caller terminal 2 and the receiver terminal 3. The authentication device 1 determines whether or not the sender is a related party of the receiver based on the voiceprint data of the senders of the transmitting terminals 2a and 2b, and notifies the receiving terminal 3 of the result.

  Here, the related person is a person to whom a fraudster impersonates, for example, a close relative of a recipient such as a family member, a relative, or an acquaintance. The related person is also referred to as a registrant when the voiceprint data is registered in the authentication device 1.

  The transmitting terminals 2 a and 2 b are telephone terminals that transmit to the receiving terminal 3. In the embodiment of the present invention, the transmission terminal 2a is a telephone terminal used by a registrant, and the transmission terminal 2b is a telephone terminal used by a third party other than the registrant. In the embodiment of the present invention, the transmission terminal 2a and the transmission terminal 2b may be collectively described as the transmission terminal 2.

  The receiving terminal 3 is a telephone terminal that receives a call from the calling terminal 2. The recipient of the receiving terminal 3 is a user of the service by the authentication device 1 according to the embodiment of the present invention.

  In the embodiment of the present invention, the transmitting terminal 2 and the receiving terminal 3 are only required to be able to talk, and may be a fixed phone, a mobile phone, a smartphone, or the like, or a personal computer having a telephone function. Also good. The transmission terminal 2 and the reception terminal 3 further include an input device (not shown) for inputting an operation such as an input button and an output device (not shown) such as a display.

  In the embodiment of the present invention, the case where the call network 4 is based on circuit switching will be described. However, it may be a packet communication network capable of realizing an IP phone, a mobile network used for a call between mobile phones, or the like.

(Authentication device)
As illustrated in FIG. 1, the authentication device 1 is a general computer including a storage device 10, a processing device 20, and a communication control device 30. The authentication apparatus 1 implements each function shown in FIG. 1 by a general computer executing an authentication program for realizing a predetermined function.

  The communication control device 30 is an interface connected to the transmission terminal 2 and the reception terminal 3 via the call network 4. The communication control device 30 implements a telephone function for the authentication device 1 to connect to the call network 4 and acquire the call of the calling terminal 2.

  The storage device 10 stores an authentication program, and stores registrant number data 11, caller voiceprint data 12, caller text data 13, keyword data 14, and registrant voiceprint data 15.

  The registrant number data 11 is a list of registrant telephone numbers registered in advance by the receiver as parties concerned with the receiver. The registrant number data 11 stores the registrant identifier in association with the registrant's telephone number.

  The caller voiceprint data 12 is data obtained by converting voice data in a call from the caller terminal 2 into a voiceprint. The caller text data 13 is data obtained by converting a call from the calling terminal 2 into text data. The caller voice print data 12 and the caller text data 13 are sequentially stored by the caller voice data conversion means 22 described later.

  The keyword data 14 is a list of keywords that are expected to appear frequently in a call when the caller impersonates a related person for fraud. For example, in the case of “transfer fraud”, keywords frequently used in wire fraud such as “I” and “transfer” are registered in the keyword data 14 in addition to fraud account information and names often used by fraudsters in conversation. Is done.

  The registrant voice print data 15 is voice print data of the parties related to the recipient of the receiving terminal 3. The registrant voiceprint data 15 stores the voiceprint data of the related person in association with the identifier of the related person. The registrant voiceprint data 15 is updated every time a registrant data registration unit 24, which will be described later, registers a related person.

  Here, the sender voiceprint data 12 and the registrant voiceprint data 15 may be stored in any format as long as the match / mismatch of the speakers can be compared.

  The processing device 20 includes call processing control means 21, caller voice data conversion means 22, authentication means 23, and registrant data registration means 24.

  The call processing control means 21 controls a three-party call between the calling terminal 2 and the receiving terminal 3 in response to a three-party call request from the receiving terminal 3. When the call processing control means 21 receives an incoming call from the receiving terminal 3 and receives a three-party call request, the call processing control means 21 receives a three-way call between the authentication apparatus 1 and the receiving terminal 3 and receives the three calls from the authentication apparatus 1, the receiving terminal 3 and the calling terminal 2. Switch to person call.

  The call processing control means 21 further refers to the telephone number of the calling terminal 2 and compares it with the telephone number of the registrant number data 11. When the telephone number of the transmission terminal 2 is included in the registrant number data 11, the call processing control means 21 notifies the reception terminal 3 that the caller of the transmission terminal 2 is a related party.

  The caller voice data conversion means 22 converts voice data in a call from the caller terminal 2 into caller voiceprint data, generates caller voiceprint data 12, and stores it in the storage device 10. The caller voice data conversion means 22 further converts the call of the caller of the caller terminal 2 into text data, generates the caller text data 13 and stores it in the storage device 10. The caller voice data conversion means 22 sequentially generates the caller voiceprint data 12 and the caller text data 13 from the utterances of the callers that are sequentially input, and stores them in the storage device 10.

  The caller voice data conversion means 22 extracts the caller's voice data in a three-party call with the authentication device 1, the receiving terminal 3 and the calling terminal 2, excluding the utterance of the receiver of the receiving terminal 3. The caller voice data conversion means 22 generates the caller voiceprint data 12 that can be compared with the registrant voiceprint data 15 from the extracted caller voice data, and converts the voice data into the text. Generate.

  The authentication means 23 compares the caller voice print data 12 and the registrant voice print data 15 and, if they match, notifies that the caller of the caller terminal 2 is a related person. The authenticating means 23 compares the sender voiceprint data 12 and the registrant voiceprint data 15 that are sequentially generated, and notifies the authentication result when the match / mismatch with the registrant can be authenticated with a predetermined accuracy. When the registrant voice print data 15 includes voice print data of a plurality of related parties, the authentication unit 23 compares the caller voice print data 12 with each voice print data of the registrant voice print data 15 to obtain the caller voice print data 12. The presence or absence of voiceprint data that matches is searched. If there is matching voiceprint data, that is, if the sender is a party related to the receiver, the authentication unit 23 notifies the receiving terminal 3 to that effect.

  On the other hand, if the sender voiceprint data 12 does not match any voiceprint data of the registrant voiceprint data 15, that is, if the sender is not a party related to the receiver, the authentication means 23 notifies the receiving terminal to that effect.

  Further, the authentication means 23 may determine whether or not the sender is a bank fraud scam based on the sender text data 13 and notify the result. Specifically, the authentication means 23 determines that the sender is a scam if the sender voiceprint data 12 and the registrant voiceprint data 15 do not match and if the keyword of the keyword data 14 is included in the sender text data 13. Notify that you are impersonating. If the caller is not a related person, the caller is pretending to be a related person and there is a possibility of a transfer fraud. Therefore, when the caller is not a related person, the authentication unit 23 examines the possibility of wire fraud from the content of the call and notifies the receiving terminal 3 of the result.

  In the embodiment of the present invention, the means for the authentication means 23 notifying the receiving terminal 3 of the authentication result is not limited. For example, the authentication unit 23 may display the authentication result on the receiving terminal 3 or may notify by voice.

  The registrant data registration unit 24 stores the voice print data of the parties related to the recipient of the receiving terminal 3 as the registrant voice print data 15 in the storage device 10. For example, when a user of the service requests his / her related party to send the authentication apparatus 1 to register voiceprint data, the registrant data registration unit 24 acquires the voiceprint data of the related party.

(Call processing)
With reference to FIG. 2, the process in which the authentication device 1 authenticates the call from the calling terminal 2 will be described.

  First, in step S <b> 1, the transmission terminal 2 transmits to the reception terminal 3 via the call network 4. Here, the receiver of the receiving terminal 3 requests authentication of the sender of the transmitting terminal 2 when the sender is not sure who the sender is or when the sender may pretend to be a party. . Specifically, when the receiver performs a push on a transfer button, a hooking operation, or the like, in step S2, the receiving terminal 3 performs a three-party call between the authentication device 1, the receiving terminal 3, and the transmitting terminal 2 based on this operation. Request.

  When a three-party call is requested from the receiving terminal 3, the authentication device 1 switches to the three-party call of the authentication device 1, the receiving terminal 3 and the calling terminal 2 in cooperation with the call network 4 in step S 3. Further, in step S <b> 4, the authentication device 1 authenticates the caller from the call from the calling terminal 2. In step S5, the authentication device 1 notifies the reception terminal 3 of the authentication result in step S4.

  With reference to FIG. 3, a process in which the authentication device 1 registers voice print data of related parties will be described.

  First, in step S <b> 11, the transmission terminal 2 transmits to the authentication device 1. In step S <b> 12, the authentication device 1 generates voiceprint data from the utterance of the caller, associates the identifier of the caller with the voiceprint data of the caller's call, and stores it in the registrant voiceprint data 15.

(Authentication process)
With reference to FIG. 4, the authentication process by the authentication apparatus 1 is demonstrated. The process of step S21 shown in FIG. 4 is executed by the call processing control means 21, the processes of steps S22 to S23 are executed by the caller voice data converting means 22, and the processes of steps S24 to S28 are the authentication means 23. It is executed by.

  First, in step S <b> 21, the authentication device 1 determines whether or not the telephone number of the calling terminal 2 is included in the registrant number data 11. When the telephone number of the transmission terminal 2 is included in the registrant number data 11, the process proceeds to step S26, where the authentication device 1 notifies the reception terminal 3 that the caller is a registrant and ends the process.

  When the telephone number of the calling terminal 2 is not included in the registrant number data 11, the authentication device 1 acquires the caller's voice data from the calling terminal 2 in step S22. In step S <b> 23, the authentication device 1 converts the voice data acquired in step S <b> 22 into the sender voiceprint data 12 and the sender text data 13 and stores them in the storage device 10.

  In step S <b> 24, the authentication unit 23 determines whether the sender voiceprint data 12 matches the registrant voiceprint data 15. If the sender voiceprint data 12 matches the registrant voiceprint data 15, the process proceeds to step S26, where the authentication device 1 notifies the receiving terminal 3 that the sender is a registrant, and ends the process.

  On the other hand, if the sender voiceprint data 12 does not match the registrant voiceprint data 15, the authentication device 1 determines whether the sender text data 13 includes the keyword of the keyword data 14 in step S25. When the sender text data 13 includes the keyword of the keyword data 14, in step S27, the authentication device 1 notifies the receiving terminal 3 that the sender is a third party and has a high possibility of fraud. The process ends.

  When the sender text data 13 does not include the keyword of the keyword data 14, the authentication device 1 notifies the receiving terminal 3 that the sender is a third party and the possibility of fraud is low in step S28. The process is terminated.

  According to the call system 5 according to the embodiment of the present invention, it is easy to determine whether or not a call from a third party is due to impersonation by storing the voiceprint data of the recipient's parties as white data. Can be specified. Further, by generating the white data, it is possible to reduce the amount of voiceprint data held by the authentication device 1 and the time required for authentication.

  Furthermore, when it is determined that the caller is not a related party, it is determined whether or not the caller is a fraud based on the presence or absence of a keyword used for wire fraud. Thereby, the authentication device 1 can quickly determine whether or not the caller is a fraudster and notify the receiving terminal 3 of it.

  The authentication device 1 according to the embodiment of the present invention can authenticate the caller while the caller terminal 2 and the receiver terminal 3 are talking. Therefore, the authentication device 1 can quickly resolve the anxiety of the callee when the caller is a registrant. In addition, when there is a possibility that the caller is not a registrant but a fraudster, the authentication device 1 can promptly warn the caller during a call and prevent crime damage such as wire fraud. To do.

  Furthermore, it can be expected that the accuracy of the authentication device 1 is improved when the user prompts the close relative to register voiceprint data.

(First modification)
In the embodiment of the present invention, the case where the receiving terminal 3 and the authentication device 1 are different terminals has been described. However, in the first modification, the case where the receiving terminal 100 has the function of the authentication device 1 will be described. .

  The receiving terminal 100 is a device that can execute a predetermined authentication program and can make a call. The receiving terminal 100 is a smartphone having a computer that can execute a program, a mobile phone, a computer having a call function, or the like. The receiving terminal 100 further includes an input device (not shown) for inputting an operation of the receiver such as an input button, and an output device (not shown) for displaying an authentication result or the like such as a display.

  The receiving terminal 100 is different from the authentication device 1 shown in FIG. 1 in that it does not include the call processing control unit 21 but includes the call unit 25. The call means 25 receives a call from the call terminal 2 and controls a call between the caller and the receiver. Similarly to the call processing control unit 21, the calling unit 25 may refer to the telephone number of the calling terminal 2 and compare it with the telephone number of the registrant number data 11. When the telephone number of the calling terminal 2 is included in the registrant number data 11, the calling means 25 notifies that the calling person of the calling terminal 2 is a related person.

  The processing of the sender voice data conversion unit 22, the authentication unit 23, and the registrant data registration unit 24 of the receiving terminal 100 is the same as the processing of each unit of the authentication device 1 shown in FIG. The authentication device 1 shown in FIG. 1 starts the authentication process based on a request for a three-party call from the receiving terminal 3, but the receiving terminal 100 shown in FIG. The operation is different in that the authentication process is started. Further, the registrant data registration means 24 of the receiving terminal 100 may acquire the voice print data of the registrant by directly inputting the voice to the receiving terminal 100 without making a call to the parties involved in the receiver.

  As described above, the authentication method described in the embodiment of the present invention may be implemented in the receiving terminal 100. This reduces the cost of the authentication device 1 and reduces the burden of maintaining voiceprint data. Furthermore, when the recipient's related person directly inputs the voice to the receiving terminal 100, the burden on the related person to register the voiceprint data is reduced.

(Second modification)
In the embodiment of the present invention, the authentication device 1 for avoiding a bank transfer fraud has been described. In the second modification, a case where the authentication device 1 is applied to a personal authentication system in a telephone response service will be described. The call system 5 according to the second modification is used for services such as credit card inquiries at financial institutions, telephone banking services, and other services that exchange confidential information over the phone. Authenticate the person.

  The authentication device 200 according to the second modification is different from the authentication device 1 according to the embodiment of the present invention in that it specializes in authentication related to a voice print. That is, the storage device 10 is different in that the caller voice print data 12 and the registrant voice print data 15 are stored, and the registrant number data 11, the caller text data 13 and the keyword data 14 are not stored. The caller voice data conversion means 22 generates the caller voiceprint data 12 and the authentication means 23 authenticates whether or not the user is a registrant based on the caller voiceprint data 12.

  In the second modification, the registrant is a user who uses a credit card inquiry or a telephone banking service. Such a user inputs voice to the authentication device 200 when using the service, and the authentication device 200 generates voiceprint data from the voice of the user and registers it in the registrant voiceprint data 15.

  When transmitting to the receiving terminal 3, the transmitting terminal 2 starts a three-way call between the authentication device 200, the receiving terminal 3 and the transmitting terminal 2 under the control of the operator or the automatic response system. Enter 200. The authentication device 200 generates the sender voiceprint data 12 from the input voice and compares it with the registrant voiceprint data 15 to determine whether or not the sender is the same person as the registrant.

  In the second modified example, processing for authenticating a call from the calling terminal 2 by the authentication device 200 and processing for registering the voice print data of the user by the authentication device 200 will be described with reference to FIGS. This is the same as the above processing.

  With reference to FIG. 7, the authentication process by the authentication device 200 according to the second modification will be described.

  In step S <b> 31, the authentication device 200 acquires the caller's voice data from the caller terminal 2. In step S <b> 32, the authentication device 200 converts the voice data acquired in step S <b> 31 into the sender voiceprint data 12 and stores it in the storage device 10.

  In step S <b> 33, the authentication unit 23 determines whether or not the sender voiceprint data 12 matches the registrant voiceprint data 15. If the sender voiceprint data 12 matches the registrant voiceprint data 15, the process proceeds to step S34, and the authentication apparatus 200 notifies the receiving terminal 3 that the sender is a registrant, and ends the process.

  On the other hand, if the sender voiceprint data 12 does not match the registrant voiceprint data 15, the authentication apparatus 200 notifies the receiving terminal 3 that the sender is a non-registrant and is likely to be impersonated in step S35. Then, the process ends.

  Here, the authentication results in step S34 and step S35 may be transmitted to the receiving terminal 3 used by the operator, or may be transmitted to a computer that the operator can visit.

  As described above, the authentication method described in the embodiment of the present invention can be applied to a service for exchanging confidential information by telephone, thereby realizing highly accurate authentication.

(Other embodiments)
As described above, the embodiments of the present invention and the first and second modifications have been described. However, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. . From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the authentication device 1 described in the embodiment of the present invention may be configured on a single piece of hardware as shown in FIG. 1, or may be configured on a plurality of pieces of hardware according to the functions and the number of processes. May be. Moreover, you may implement | achieve on the existing telephone call system.

  It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1,200 Authentication apparatus 2 Originating terminal 3 Receiving terminal 4 Telephone network 5 Telephone system 10 Storage apparatus 11 Registrant number data 12 Originator voiceprint data 13 Originator text data 14 Keyword data 15 Registrant voiceprint data 20 Processing apparatus 21 Call processing control Means 22 Caller voice data conversion means 23 Authentication means 24 Registrant data registration means 25 Call means 30 Communication control device

Claims (8)

An authentication device for authenticating a caller based on a call between a calling terminal and a receiving terminal,
Registrant data registration means for storing the voice print data of the parties related to the recipient of the receiving terminal in the storage device as registrant voice print data;
Caller voice data conversion means for generating caller voiceprint data from voice data in a call from the calling terminal;
An authentication apparatus comprising: authentication means for notifying that the caller of the caller terminal is the related person when the caller voiceprint data and the registrant voiceprint data match and match. The storage device further stores keyword data including keywords that are expected to appear frequently in a call when the caller impersonates the party due to fraud,
The caller voice data conversion means further generates caller text data from the call of the calling terminal,
The authentication means, when the sender voiceprint data does not match the registrant voiceprint data, and when the keyword is included in the sender text data, the sender is impersonating for fraud The authentication device according to claim 1, wherein: The authentication apparatus according to claim 1, further comprising: a call processing control unit configured to control a three-party call with the transmitting terminal and the receiving terminal in response to a three-party call request from the receiving terminal. A telephone terminal that receives a call from a calling terminal and authenticates a caller based on a call with the calling terminal,
Registrant data registration means for storing the voice print data of the parties related to the recipient of the telephone terminal in a storage device as registrant voice print data;
Caller voice data conversion means for generating caller voiceprint data from voice data in a call from the calling terminal;
A telephone terminal comprising: authentication means for notifying that the caller of the caller terminal is the related party when the caller voiceprint data and the registrant voiceprint data match and match. Based on the call between the calling terminal and the receiving terminal, the authentication device is an authentication method for authenticating the caller,
The authentication device storing voice print data of a recipient of the recipient of the receiving terminal in a storage device as registrant voice print data;
The authentication device generating caller voiceprint data from voice data in a call from the calling terminal;
The authentication device comprises a step of comparing the caller voice print data with the registrant voice print data and notifying that the caller of the caller terminal is the related party if they match. Authentication method. The authentication device storing, in the storage device, keyword data including a keyword expected to appear frequently in a call when the caller impersonates the related person for fraud;
The authentication device generating caller text data from a call of the calling terminal;
When the authentication device does not match the caller voice print data and the registrant voice print data, and the caller text data includes the keyword, the caller is impersonating for fraud. The authentication method according to claim 5, further comprising a step of notifying. An authentication method in which a telephone terminal receives a call from a calling terminal and authenticates a caller based on a call with the calling terminal,
The telephone terminal storing voice print data of a party related to the recipient of the telephone terminal in a storage device as registrant voice print data;
The telephone terminal generates caller voice print data from voice data in a call from the calling terminal;
The telephone terminal comprises comparing the caller voiceprint data and the registrant voiceprint data and notifying that the caller of the caller terminal is the related party if they match. Authentication method.   An authentication program for causing a computer to function as the means according to any one of claims 1 to 4.

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