JP2023173488A - Information processing device, communication terminal, communication system, information processing method, and program - Google Patents

Abstract

To provide an information processing device capable of suppressing spoofing in a communication system.SOLUTION: An information processing device includes: first processing means for outputting, to a first communication terminal associated with a first user that is a connection destination, first guidance for causing to notify at least one of the first user's name, an organization to which the first user belongs, and the first user's official position; second processing means for authenticating a voiceprint of voice that is a response to the first guidance; and third processing means for notifying the first communication terminal of completion of a communication connection of the first communication terminal if the authentication by the second processing means is successful.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to an information processing device, a communication terminal, a communication system, an information processing method, and a program.

2. Description of the Related Art Telephone calls are frequently made between devices such as telephones and computers via networks. Patent Document 1 discloses, as a related technique, a technique related to a telephone system that takes measures against bank transfer fraud and the like.

JP2020-188322A

By the way, in a communication system where calls are made between devices, if the communication connection is made only by voice, it may be possible to impersonate another person by imitating the voice. Therefore, there is a need for technology that can suppress spoofing in communication systems.

One of the objectives of each aspect of the present disclosure is to provide an information processing device, a communication terminal, a communication system, an information processing method, and a program that can solve the above problems.

In order to achieve the above object, according to one aspect of the present disclosure, an information processing apparatus sends a first user's name, a first user's a first processing means that outputs a first guidance that notifies at least one of an organization to which the user belongs and a position of the first user; and a second processing means that performs voiceprint authentication on a voice that is a response to the first guidance. and a third processing means for notifying the first communication terminal of completion of the communication connection of the first communication terminal when the authentication by the second processing means is successful.

In order to achieve the above object, according to another aspect of the present disclosure, a communication system includes the above information processing device and the first communication terminal.

In order to achieve the above object, according to another aspect of the present disclosure, an information processing method includes a first communication terminal associated with a first user to be connected to, the name of the first user, the first outputting a first guidance that notifies at least one of an organization to which a user belongs and a job title of the first user; authenticating a voiceprint of a voice that is a response to the first guidance; and notifying the first communication terminal that the communication connection of the first communication terminal is completed if the communication connection is successful.

In order to achieve the above object, according to another aspect of the present disclosure, a program causes a computer to send the first user's name, the first user's name, and the outputting a first guidance that notifies at least one of an organization to which one user belongs and a position of the first user; and performing voiceprint authentication on a voice that is a response to the first guidance; If the authentication is successful, the first communication terminal is notified of completion of the communication connection of the first communication terminal.

According to each aspect of the present disclosure, spoofing can be suppressed in a communication system.

1 is a diagram illustrating an example of a configuration of a telephone call system according to an embodiment of the present disclosure. FIG. 1 is a diagram illustrating an example of a configuration of a telephone terminal according to an embodiment of the present disclosure. FIG. 1 is a diagram illustrating an example of a configuration of a switching device according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating an example of a first processing flow of a telephone call system according to an embodiment of the present disclosure. FIG. 2 is a first diagram illustrating an example of a second processing flow of the telephone call system according to an embodiment of the present disclosure. FIG. 2 is a second diagram illustrating an example of a second processing flow of the telephone call system according to an embodiment of the present disclosure. FIG. 7 is a diagram illustrating an example of a third processing flow of the telephone call system according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating the minimum configuration of a switching device according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating an example of a processing flow of a switching device with a minimum configuration according to an embodiment of the present disclosure. FIG. 1 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings.
<Embodiment>
FIG. 1 is a diagram showing an example of the configuration of a telephone call system 1 according to an embodiment of the present disclosure. As shown in FIG. 1, the telephone call system 1 (an example of a communication system) includes a telephone terminal 10a (an example of a second communication terminal, an example of a terminal device) and a telephone terminal 10b (an example of a first communication terminal, an example of a communication terminal). ), a switching device 20 (an example of an information processing device), and a telephone switching network NW. The telephone call system 1 authenticates the user using the user's voice, and controls incoming and outgoing calls according to the authentication result. Hereinafter, the telephone terminals 10a and 10b will be collectively referred to as the telephone terminal 10.

FIG. 2 is a diagram illustrating an example of the configuration of the telephone terminal 10 according to an embodiment of the present disclosure. As shown in FIG. 2, the telephone terminal 10 includes a man-machine IF (Interface) 101, an exchange control unit 102, and an exchange connection IF 103.

The man-machine IF 101 exchanges information between the user and the telephone terminal 10. For example, the man-machine IF 101 converts voice generated by a user into an electrical signal that can be processed by the telephone terminal 10. Further, for example, the man-machine IF 101 converts an audio signal, which is an electrical signal indicating the sound (including voice) received by the telephone terminal 10 from the outside, into a sound that can be heard by the user. The man-machine IF 101 is, for example, a handset with microphone and speaker functions.

The exchange control unit 102 is compatible with a protocol for connection control of the telephone terminal 10 performed by the exchange control unit 203 of the exchange device 20, which will be described later, based on user instructions for call control (switch control) and the results of user voiceprint analysis. Performs call connection control.

The exchange connection IF 103 is connectable to the telephone exchange network NW. This connection method may be IP (Internet Protocol), ISDN (Integrated Services Digital Network), or analog. Further, this connection method may be any other method. When the exchange connection IF 103 is connected to the telephone exchange network NW and the user on the other end of the call responds to the connection, the telephone terminal 10 connects to the other telephone terminal 10 via the exchange device 20 under the control of the exchange control unit 102. You can talk to the user.

Note that other functions necessary for the telephone terminal 10 are the same as those of a general telephone terminal. More specific processing performed by the telephone terminal 10 will be described later.

FIG. 3 is a diagram illustrating an example of the configuration of the switching device 20 according to an embodiment of the present disclosure. As shown in FIG. 3, the exchange device 20 includes an exchange connection IF 201, an analysis unit 202, an exchange control unit 203 (an example of a first processing means, an example of a second processing means, an example of a third processing means, and a fourth processing means). (an example of a fifth processing means, an example of a sixth processing means, an example of a seventh processing means, an example of an eighth processing means), and a storage unit 204.

The exchange connection IF 201 is connectable to the telephone exchange network NW. Note that this connection method may be IP, ISDN, or analog. Further, this connection method may be any other method.

The analysis unit 202 analyzes the user's voice and extracts necessary information. Examples of necessary information include the user's name, the organization to which the user belongs, the user's position, and the contents of the user's instructions in call control (switching control). Examples of the contents of the user's instructions include specifying a destination to connect to and whether to respond to incoming calls.

Furthermore, the analysis unit 202 analyzes the voiceprint from the user's voice and compares it with information registered or already registered in the exchange device 20 . The exchange control unit 203 controls the connection of the telephone terminal 10 based on the contents of the user's instructions in call control (exchange control) and the result of the user's voiceprint analysis by the analysis unit 202.

The storage unit 204 holds information such as the user's name, the user's affiliated organization, and the user's position. Furthermore, the storage unit 204 holds data of the user's voiceprint analysis. This data is maintained when the user's name, user's affiliated organization, user's position, etc. are registered. Note that more specific processing performed by the exchange device 20 will be described later.

Next, processing performed by the telephone call system 1 according to an embodiment of the present disclosure will be described. More specific processing performed by the telephone terminal 10 and the switching device 20 will now be described.

(Registration of telephone directory information)
FIG. 4 is a diagram illustrating an example of a first processing flow of the telephone call system 1 according to an embodiment of the present disclosure. The first process is a process of registering telephone directory information, which will be described later, and the first process flow shown in FIG. 4 shows a process of registering telephone directory information performed by the telephone call system 1. First, with reference to FIG. 4, the process of registering telephone directory information performed by the telephone call system 1 will be described. Note that the process of registering telephone directory information described here is a process that is performed before the user uses the telephone call system 1 to make and receive calls.

The user performs an operation (a special number calling operation in FIG. 4) on the telephone terminal 10 to dial (make a call) to a special telephone number for registering telephone directory information. The exchange control unit 102 outputs a voiceprint registration request to the exchange device 20 via the exchange connection IF 103 in response to the user's operation on the telephone terminal 10 (step S1).

The exchange control unit 203 receives a voiceprint registration request via the exchange connection IF 201. The exchange control unit 203 outputs an audio signal of registration start guidance to the telephone terminal 10 in response to the received voiceprint registration request (step S2). Registration initiation guidance prompts the user to notify at least one of the user's name, the user's affiliated organization, and the user's position (in other words, it is possible to identify (specify) the user on the other end of the call). It is guidance that informs information. For example, if there are no users with the same last name and last name, it is possible to identify the user on the other end of the conversation by notifying only the user's name. Furthermore, if there is only one position, it is possible to identify the user on the other end of the conversation by notifying only that position. Furthermore, if the organization is made up of one person, it is possible to identify the user on the other end of the call by notifying only the organization to which the user belongs. Therefore, the information for identifying the user on the other end of the call is set according to the actual operation.

The exchange control unit 102 receives an audio signal of registration start guidance via the exchange connection IF 103. The exchange control unit 102 outputs the received audio signal to the man-machine IF 101. The man-machine IF 101 converts the audio signal output by the exchange control unit 102 into sound, thereby outputting the voice of the registration start guidance (step S3).

Here, it is assumed that the user utters his or her name, organization, position, etc. to the man-machine IF 101 in accordance with the audio registration start guidance output by the man-machine IF 101. The man-machine IF 101 converts the user's name, organization, position, and other sounds uttered by the user into electrical signals. The man-machine IF 101 outputs an electrical signal indicating audio information such as the user's name, the organization to which the user belongs, and the user's position to the exchange device 20 via the exchange connection IF 103 (step S4).

The analysis unit 202 receives an electrical signal indicating audio information such as the user's name, the organization to which the user belongs, and the user's position via the exchange connection IF 201 . The analysis unit 202 extracts the user's name, the user's affiliated organization, the user's position, etc. from the received electrical signal (step S5). The analysis unit 202 registers the extracted user's name, the user's affiliated organization, the user's position, etc. in the storage unit 204 (step S6).

Furthermore, the analysis unit 202 extracts the user's voiceprint by analyzing the voice of the user's name, the user's affiliated organization, the user's position, etc. indicated by the received electrical signal (step S7). The analysis unit 202 associates the extracted voiceprint of the user with the name of the corresponding user in the telephone directory information, the organization to which the user belongs, the user's position, etc., and registers it in the storage unit 204 as telephone directory information (step S8).

When the analysis unit 202 completes the registration process in step S8, the exchange control unit 203 outputs voice data of registration completion guidance to the telephone terminal 10 (step S9). The registration completion guidance is guidance that notifies the user that registration of at least one of the user's name, the user's affiliated organization, and the user's position, and the user's voiceprint has been completed.

In addition, the exchange control unit 203 outputs a disconnection notification to the telephone terminal 10 to notify that the registration of the user's voiceprint and at least one of the user's name, the user's affiliated organization, and the user's position has been completed. (Step S10). The telephone terminal 10 that has received the disconnection notification notifies the user that the call connection has been terminated (disconnected) (prompts the user to end use of the telephone terminal 10). Examples of the notification means include means for outputting a busy tone from the man-machine IF 101 of the telephone terminal 10, and means for displaying a notification on the display when the telephone terminal 10 is provided with a display.

(Make/receive calls)
FIG. 5 is a first diagram illustrating an example of a second processing flow of the telephone call system 1 according to an embodiment of the present disclosure. FIG. 6 is a second diagram illustrating an example of a second processing flow of the telephone call system 1 according to an embodiment of the present disclosure. The second process flow shown in FIGS. 5 and 6 shows the process of making and receiving calls performed by the telephone system 1. Next, with reference to FIGS. 5 and 6, the process of making and receiving calls performed by the telephone call system 1 will be described. Here, a process in which a calling user makes a call using the telephone terminal 10a and a receiving user receives the call using the telephone terminal 10b will be described.

The calling user performs an operation of dialing (making a call) a special telephone number for calling (special number calling operation in FIG. 5) on the telephone terminal 10a. The switching control unit 102 of the telephone terminal 10a outputs a call connection request to the switching device 20 via the switching connection IF 103 of the telephone terminal 10a in response to the operation of the calling user on the telephone terminal 10a (step S21).

The exchange control unit 203 receives a call connection request via the exchange connection IF 201. In response to the received call connection request, the exchange control unit 203 outputs a guidance audio signal prompting notification of the connection destination to the telephone terminal 10a (step S22). The connection destination notification is guidance that prompts the calling user to notify at least one of the name of the called user, the organization to which the called user belongs, and the position of the called user.

The exchange control unit 102 of the telephone terminal 10a receives a guidance audio signal prompting notification of the connection destination via the exchange connection IF 103 of the telephone terminal 10a. The exchange control unit 102 of the telephone terminal 10a outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10a. The man-machine IF 101 of the telephone terminal 10a converts the audio signal output by the exchange control unit 102 of the telephone terminal 10a into sound, thereby outputting a guidance voice prompting notification of the connection destination (step S23).

Here, the calling user follows the guidance to notify the connection destination of the voice output from the man-machine IF 101 of the telephone terminal 10a, and sends the name of the called user and the affiliation of the called user to the man-machine IF 101 of the telephone terminal 10a. Suppose that the organization, the position of the called user, etc. are uttered. The man-machine IF 101 of the telephone terminal 10a converts the voice of the calling user, such as the name of the called user, the organization to which the called user belongs, and the position of the called user, into an electrical signal. The man-machine IF 101 of the telephone terminal 10a outputs an electrical signal indicating the name of the called user, the organization to which the called user belongs, the position of the called user, etc. to the exchange device 20 via the exchange connection IF 103 of the telephone terminal 10a. (Step S24).

The analysis unit 202 receives an electrical signal indicating the name of the called user, the organization to which the called user belongs, the position of the called user, etc. via the exchange connection IF 201 . The analysis unit 202 extracts the voiceprint of the calling user by analyzing the voice (the name of the called user, the organization to which the called user belongs, the position of the called user, etc.) indicated by the received electrical signal. The analysis unit 202 authenticates the extracted voiceprint of the calling user (step S25).

Specifically, for example, the analysis unit 202 compares each voiceprint registered as telephone directory information in the storage unit 204. Based on the comparison result, the analysis unit 202 identifies a voiceprint that matches the extracted voiceprint of the calling user among the user voiceprints registered as telephone directory information in the storage unit 204. For example, the analysis unit 202 digitizes the ratio of each frequency component included in the voiceprint, and if the degree of matching of the ratio of each frequency component indicated by the comparison result is equal to or higher than a threshold value indicating a predetermined degree, the analysis unit 202 The user's voiceprint is identified by determining that it is the voiceprint of the compared user registered as telephone directory information in the storage unit 204. Furthermore, if the degree of matching of the ratio of each frequency component indicated by the comparison result is less than a threshold value indicating a predetermined degree, the analysis unit 202 registers the extracted voiceprint of the calling user as telephone directory information in the storage unit 204. It is determined that the voiceprint is not the compared user's voiceprint. Note that if the analysis unit 202 is unable to identify a voiceprint that matches the extracted voiceprint of the calling user among the voiceprints of the users registered as telephone directory information in the storage unit 204, the analysis unit 202 processes the outgoing/incoming call. end.

If the analysis unit 202 is able to identify a voiceprint that matches the extracted voiceprint of the calling user among the voiceprints of users registered as telephone directory information in the storage unit 204, the analysis unit 202 identifies the called user from the received electrical signal. The name of the user, the organization to which the called user belongs, the position of the called user, etc. are extracted. The analysis unit 202 identifies information matching the extracted name of the called user, the organization to which the called user belongs, the position of the called user, etc. in the telephone directory information of the storage unit 204. For example, the analysis unit 202 extracts the name of the called user, the organization to which the called user belongs, the position of the called user, etc. that are registered as the telephone directory information in the storage unit 204, the name of the user, the organization to which the user belongs, the position of the called user, etc. When compared with the title, if they match, it means that information matching the extracted name of the called user, the organization to which the called user belongs, the title of the called user, etc. has been identified in the telephone directory information in the storage unit 204. The analysis unit 202 also extracts the name of the called user, the organization to which the called user belongs, the position of the called user, etc., which are registered as the telephone directory information in the storage unit 204. All positions are compared, and if they do not match, it is determined that information matching the extracted name of the called user, organization to which the called user belongs, position of the called user, etc. cannot be specified in the telephone directory information in the storage unit 204. Note that "match" here is not limited to complete match. For example, the calling user does not know in advance what kind of information the called user has registered (for example, in the case of an affiliated organization, whether it is a company name, a division name, a department name, or an abbreviation). It is possible that there is no such thing. Therefore, in the above-mentioned comparison, the analysis unit 202 may determine that there is a match even when the two compared words are synonyms, instead of a complete match.

If the analysis unit 202 determines that information that matches the extracted name of the called user, the organization to which the called user belongs, the position of the called user, etc. cannot be specified in the telephone directory information in the storage unit 204, the analysis unit 202 ends the call processing. do. When the analysis unit 202 identifies information that matches the extracted name of the called user, the organization to which the called user belongs, the position of the called user, etc. in the phone directory information in the storage unit 204, the analysis unit 202 specifies the information in the phone directory information in the storage unit 204. Identify the phone number associated with the information you received.

When the analysis unit 202 identifies a telephone number, the exchange control unit 203 notifies the telephone terminal 10b of that telephone number to receive a call (step S27). Furthermore, the exchange control unit 203 notifies the telephone terminal 10a that the telephone terminal 10a is being called until the telephone terminal 10b responds (step S28).

The exchange control unit 102 of the telephone terminal 10b receives the notification from the process of step S27 via the exchange connection IF 103 of the telephone terminal 10b. In response to the notification, the exchange control unit 102 of the telephone terminal 10b outputs a ringtone via the man-machine IF 101 of the telephone terminal 10b (step S29).

Further, the exchange control unit 102 of the telephone terminal 10a receives the notification by the process of step S28 via the exchange connection IF 103 of the telephone terminal 10a. In response to the notification, the exchange control unit 102 of the telephone terminal 10a outputs a ringing tone via the man-machine IF 101 of the telephone terminal 10a (step S30).

Here, it is assumed that the receiving user performs an operation (for example, an off-hook operation) on the man-machine IF 101 of the telephone terminal 10b to respond to the incoming call in response to the ringtone output by the man-machine IF 101 of the telephone terminal 10b. . In response to the operation, the exchange control unit 102 of the telephone terminal 10b outputs an incoming call response notifying that the incoming call has been answered to the exchange device 20 via the exchange connection IF 103 of the telephone terminal 10b (step S31).

The exchange control unit 203 receives an incoming call response via the exchange connection IF 201. In response to the received call response, the exchange control unit 203 outputs a guidance audio signal to the telephone terminal 10b, prompting the telephone terminal 10b to notify the responder's name, affiliated organization, position, connection response/rejection, etc. by voice (step S32).

The exchange control unit 102 of the telephone terminal 10b outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10b. The man-machine IF 101 of the telephone terminal 10b converts the audio signal output by the exchange control unit 102 of the telephone terminal 10b into sound to notify the responder of the name, organization, position, connection response/rejection, etc. A guidance voice prompting the user is output (step S33).

Here, the incoming user follows the voice guidance output by the man-machine IF 101 of the telephone terminal 10b to notify the name, department, position, connection response/rejection, etc. of the responder, and then calls the man-machine of the telephone terminal 10b. Assume that the user utters the name of the responder, that is, the called user, the organization to which the called user belongs, the position of the called user, connection response/rejection, etc. to the IF 101. The man-machine IF 101 of the telephone terminal 10b converts the voice of the called user, such as the name of the called user, the organization to which the called user belongs, the called user's title, and connection response/rejection, into electrical signals. The man-machine IF 101 of the telephone terminal 10b transmits an electrical signal indicating the name of the called user, the organization to which the called user belongs, the position of the called user, connection response/rejection, etc. uttered by the called user to the exchange connection of the telephone terminal 10b. It is output to the exchange device 20 via the IF 103 (step S34).

The analysis unit 202 receives an electrical signal indicating the name of the called user, the organization to which the called user belongs, the position of the called user, and audio such as connection response/rejection via the exchange connection IF 201. The analysis unit 202 extracts the voiceprint of the called user by analyzing the voice (name of the called user, organization to which the called user belongs, position of the called user, connection response/rejection, etc.) indicated by the received electrical signal. The analysis unit 202 authenticates the extracted voiceprint of the called user (step S35).

Specifically, for example, the analysis unit 202 compares each voiceprint registered as telephone directory information in the storage unit 204. Based on the comparison result, the analysis unit 202 identifies a voiceprint that matches the extracted voiceprint of the called user among the user voiceprints registered as telephone directory information in the storage unit 204. For example, the analysis unit 202 digitizes the ratio of each frequency component included in the voiceprint, and if the degree of matching of the ratio of each frequency component indicated by the comparison result is equal to or higher than a threshold value indicating a predetermined degree, the analysis unit 202 The user's voiceprint is identified by determining that it is the voiceprint of the compared user registered as telephone directory information in the storage unit 204. Furthermore, if the degree of matching of the ratio of each frequency component indicated by the comparison result is less than a threshold value indicating a predetermined degree, the analysis unit 202 registers the extracted voiceprint of the called user as telephone directory information in the storage unit 204. It is determined that the voiceprint is not the compared user's voiceprint. Note that if the analysis unit 202 is unable to identify a voiceprint that matches the extracted voiceprint of the called user among the voiceprints of the users registered as telephone directory information in the storage unit 204, the analysis unit 202 performs processing for making and receiving calls. end.

If the analysis unit 202 determines that the voiceprint of the incoming user is that of a user registered as telephone directory information in the storage unit 204, the exchange control unit 203 transmits a guidance audio signal notifying completion of the connection to the telephone terminal. 10b (step S36). Furthermore, the exchange control unit 203 outputs a guidance audio signal notifying completion of the connection to the telephone terminal 10a (step S37).

The exchange control unit 102 of the telephone terminal 10b receives a guidance audio signal notifying completion of the connection via the exchange connection IF 103 of the telephone terminal 10b. The exchange control unit 102 of the telephone terminal 10b outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10b. The man-machine IF 101 of the telephone terminal 10b converts the audio signal output by the exchange control unit 102 of the telephone terminal 10b into sound, thereby outputting a guidance voice notifying the completion of the connection (step S38).

Further, the exchange control unit 102 of the telephone terminal 10a receives a guidance audio signal notifying completion of the connection via the exchange connection IF 103 of the telephone terminal 10a. The exchange control unit 102 of the telephone terminal 10a outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10a. The man-machine IF 101 of the telephone terminal 10a converts the audio signal output by the exchange control unit 102 of the telephone terminal 10a into sound, thereby outputting a guidance voice notifying the completion of the connection (step S39).

(Monitoring during calls)
FIG. 7 is a diagram illustrating an example of a third processing flow of the telephone call system 1 according to an embodiment of the present disclosure. The third process flow shown in FIG. 7 shows the process of monitoring during a call performed by the call system 1. Next, with reference to FIG. 7, the process of monitoring during a call performed by the call system 1 will be described. Note that the process of monitoring during a call is performed on both the voice of the calling user during the call and the voice of the called user during the call. However, here, only the process of monitoring during a call when the calling user speaks using the telephone terminal 10a and the receiving user listens to the contents of the utterance using the telephone terminal 10b will be described.

The calling user speaks toward the telephone terminal 10a (voice (calling user) in FIG. 7). The man-machine IF 101 of the telephone terminal 10a converts the voice uttered by the calling user into an electrical signal representing the voice. The man-machine IF 101 of the telephone terminal 10a outputs an electrical signal indicating voice to the exchange device 20 via the exchange connection IF 103 of the telephone terminal 10a (step S41).

The analysis unit 202 receives an electrical signal indicating voice via the exchange connection IF 201. The analysis unit 202 extracts the voiceprint of the calling user by analyzing the voice indicated by the received electrical signal. The analysis unit 202 then authenticates the extracted voiceprint of the calling user (step S42).

For example, the analysis unit 202 digitizes the ratio of each frequency component included in each of the extracted voiceprint of the calling user and the voiceprint of the calling user identified through the process of step S25. Then, the analysis unit 202 compares the value obtained by quantifying the proportion of each frequency component included in the extracted voiceprint of the calling user with the value obtained by quantifying the proportion of each frequency component contained in the voiceprint of the calling user. If the analysis unit 202 determines that the degree of matching of the ratio of each frequency component indicated by the comparison result is less than a threshold value indicating a predetermined degree, the analysis unit 202 determines that the extracted voiceprint of the calling user is the same as the calling user identified by the process of step S25. It is determined that the voiceprint does not match the user's voiceprint. In this case, the exchange control unit 203 outputs an audio signal indicating an alert sound to the telephone terminal 10b (step S43). Thereafter, the exchange control unit 203 outputs an audio signal representing the extracted voice uttered by the calling user to the telephone terminal 10b (step S44).

The exchange control unit 102 of the telephone terminal 10b receives an audio signal indicating an alert sound via the exchange connection IF 103 of the telephone terminal 10b. The exchange control unit 102 of the telephone terminal 10b outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10b. The man-machine IF 101 of the telephone terminal 10b outputs an alert sound by converting the audio signal output by the exchange control unit 102 of the telephone terminal 10b into sound (step S45). Thereafter, the exchange control unit 102 of the telephone terminal 10b receives an audio signal representing the voice uttered by the calling user via the exchange connection IF 103 of the telephone terminal 10b. The exchange control unit 102 of the telephone terminal 10b outputs the received audio signal to the man-machine IF 101 of the telephone terminal 10b. The man-machine IF 101 of the telephone terminal 10b converts the audio signal output by the exchange control unit 102 of the telephone terminal 10b into sound, thereby outputting the voice uttered by the calling user (step S46). In this way, if the analysis unit 202 determines that the extracted voiceprint of the calling user does not match the voiceprint of the calling user identified in the process of step S25, the man-machine IF 101 of the telephone terminal 10b outputs the alert sound and then , outputs the audio uttered by the calling user.

Further, if the analysis unit 202 determines that the degree of matching of the proportions of each frequency component indicated by the comparison result is equal to or higher than a threshold value indicating a predetermined degree, the analysis unit 202 identifies the extracted voiceprint of the calling user through the process of step S25. It is determined that the voiceprint matches the voiceprint of the calling user. In this case, the exchange control unit 203 proceeds to the process of step S44 without performing the process of step S43. Then, the exchange control unit 102 of the telephone terminal 10b proceeds to the process of step S46 without performing the process of step S45.

Note that only the process of monitoring the voice of a calling user during a call during a call has been described here. However, in practice, monitoring of the voice of the called user during a call is also performed. The process of monitoring the voice of a called user during a call during a call can be considered in the same way as the process of monitoring the voice of a calling user during a call described above.

The telephone call system 1 according to an embodiment of the present disclosure has been described above. In the switching device 20 (an example of an information processing device) of the telephone call system 1 (an example of a communication system), the switching control unit 203 (an example of a first processing means) associates with a called user (an example of a first user to be connected). Guidance (first guidance) for causing the telephone terminal 10b (an example of a first communication terminal) that is connected to the telephone terminal 10b (an example of a first communication terminal) to notify at least one of the name of the called user, the organization to which the called user belongs, and the position of the called user example, an example of the second processing means, and an example of the third processing means). The exchange control unit 203 performs voiceprint authentication on the voice that is a response to the guidance. If the authentication is successful, the exchange control unit 203 notifies the telephone terminal 10b of the completion of the communication connection of the telephone terminal 10b. By doing this, in the telephone call system 1, the switching device 20 can authenticate the connected user using the voiceprint. As a result, impersonation can be suppressed in the telephone call system 1 (that is, the communication system).

Generally, "impersonation prevention" measures in communication systems such as telephone systems are mainly left to user authentication by terminals. When using a telephone terminal, the user is authenticated (device authentication) by entering a password, performing fingerprint or face authentication, etc., but there is a risk of authentication being performed by unauthorized means. Furthermore, in fixed-line telephones, one terminal may be used by multiple users. Therefore, user authentication based on device authentication does not guarantee that the person responding at the connection destination is an authorized user or an intended user. On the other hand, as described above, the telephone call system 1 according to an embodiment of the present disclosure authenticates the user who responded at the connection destination using the voiceprint, so the telephone call system 1 (that is, a communication system), it becomes possible to suppress spoofing. In the telephone call system 1, a call is connected after the user is authenticated by voice (voiceprint) at the outgoing and incoming stages. Therefore, communication between users whose identities have been confirmed is guaranteed. In addition, by monitoring the voice during a call, it is possible to prevent ``spoofing'' with higher accuracy.

Furthermore, in the telephone call system 1 according to an embodiment of the present disclosure, it is possible to maintain information in communication terminals. Generally, a telephone directory (recording the telephone number of the destination, department, name, position, and other information) is set up in the telephone terminal for operation. For example, a telephone terminal selects a destination from a telephone directory and makes a call. In this case, the telephone terminal is equipped with a display, and displays the name and organization corresponding to the caller's telephone number on the display when a call is received. However, in recent years, information such as affiliated organizations, telephone numbers, names, etc. is also treated as information that should be preserved. (It needs to be treated as so-called in-house information.) On the other hand, when a telephone terminal is lost (including theft, capture, etc.), there is a high possibility that the telephone directory will be leaked, making it difficult to maintain the information. In addition, if the information in the phone book changes, maintenance is required to change and update the phone book on each phone terminal, which places a large operational burden on organizations that handle many phone terminals, such as companies and government offices. Become. In contrast, in an embodiment of the present disclosure, in the telephone call system 1, the switching device 20 holds the telephone directory information, and the telephone terminal 10 (an example of a communication terminal) does not need to hold the telephone directory. Therefore, in the telephone call system 1 according to an embodiment of the present disclosure, it is possible to maintain information in the communication terminal. In the telephone call system 1 according to an embodiment of the present disclosure, the connection destination when making a telephone call is a special telephone number of the exchange device 20, and is not the other party of the telephone call. Further, in the telephone call system 1, the name, organization, position, etc. of the other party may be specified as information on the destination to be transmitted to the switching device 20 in the subsequent outgoing processing. Therefore, there is no need for the calling side to know the telephone number of the destination, and there is no need to hold telephone directory data in the telephone terminal. Therefore, the risk of leaking in-house information when the telephone terminal 10 is lost is reduced. Further, the telephone directory only needs to be managed by the switching device 20. Therefore, maintenance effort is also reduced.

In one embodiment of the present disclosure, the unique implementation feature for telephone terminal 10 is a telephone call connection protocol. This is often implemented using software (firmware), and a general-purpose telephone terminal can be used as the hardware. Therefore, the cost for developing and introducing the telephone system 1 including the telephone terminal 10 can be reduced.

FIG. 8 is a diagram showing the minimum configuration of the switching device 20 according to the embodiment of the present disclosure. The exchange device 20 (an example of an information processing device) includes an exchange control section 203, as shown in FIG. The exchange control unit 203 sends at least one of the first user's name, the organization to which the first user belongs, and the position of the first user to the first communication terminal associated with the first user of the connection destination. Outputs the first guidance that notifies the user. The exchange control unit 203 performs voiceprint authentication on the voice that is a response to the first guidance. If the authentication is successful, the exchange control unit 203 notifies the first communication terminal of the completion of the communication connection of the first communication terminal. The exchange control unit 203 is an example of a first processing means, an example of a second processing means, and an example of a third processing means.

FIG. 9 is a diagram illustrating an example of a processing flow of the minimum configuration switching device 20 according to the embodiment of the present disclosure. Next, processing of the minimum configuration switching device 20 according to the embodiment of the present disclosure will be described with reference to FIG. 9.

The exchange control unit 203 sends at least one of the first user's name, the organization to which the first user belongs, and the position of the first user to the first communication terminal associated with the first user of the connection destination. A first guidance for notifying the user is output (step S101). The exchange control unit 203 performs voiceprint authentication on the voice that is a response to the first guidance (step S102). If the authentication is successful, the exchange control unit 203 notifies the first communication terminal of the completion of the communication connection of the first communication terminal (step S103).

The minimum configuration switching device 20 according to the embodiment of the present disclosure has been described above. This information processing device 20 can suppress spoofing in a communication system.

Note that the order of the processing in the embodiment of the present disclosure may be changed as long as appropriate processing is performed.

Although the embodiment of the present disclosure has been described, the above-described telephone system 1, exchange device 20, telephone terminal 10, and other control devices may have a computer system inside. The above-described processing steps are stored in a computer-readable recording medium in the form of a program, and the above-mentioned processing is performed by reading and executing this program by the computer. A specific example of a computer is shown below.

FIG. 10 is a schematic block diagram showing the configuration of a computer according to at least one embodiment. The computer 5 includes a CPU 6, a main memory 7, a storage 8, and an interface 9, as shown in FIG. For example, each of the above-described telephone system 1, switching device 20, telephone terminal 10, and other control devices is implemented in the computer 5. The operations of each processing section described above are stored in the storage 8 in the form of a program. The CPU 6 reads the program from the storage 8, expands it to the main memory 7, and executes the above processing according to the program. Further, the CPU 6 reserves storage areas corresponding to each of the above-mentioned storage units in the main memory 7 according to the program.

Examples of the storage 8 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), and DVD-ROM (Digital Versatile). (Disc Read Only Memory) , semiconductor memory, etc. Storage 8 may be an internal medium directly connected to the bus of computer 5, or may be an external medium connected to computer 5 via interface 9 or a communication line. Further, when this program is distributed to the computer 5 via a communication line, the computer 5 that receives the distribution may develop the program in the main memory 7 and execute the above processing. In at least one embodiment, storage 8 is a non-transitory tangible storage medium.

Further, the program may realize some of the functions described above. Furthermore, the program may be a file that can realize the above-described functions in combination with a program already recorded in the computer system, a so-called difference file (difference program).

Although several embodiments of the disclosure have been described, these embodiments are examples and do not limit the scope of the disclosure. Various additions, omissions, substitutions, and changes may be made to these embodiments without departing from the spirit of the disclosure.

Note that a part or all of the above embodiment may be described as in the following supplementary notes, but is not limited to the following.

(Additional note 1)
A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. a first processing means for outputting guidance;
a second processing means for authenticating a voiceprint of a voice that is a response to the first guidance;
a third processing means for notifying the first communication terminal of completion of the communication connection of the first communication terminal if the authentication by the second processing means is successful;
An information processing device comprising:

(Additional note 2)
fourth processing means for receiving an incoming call response from the first communication terminal;
Equipped with
The first processing means includes:
outputting the first guidance when the fourth processing means receives the incoming call response;
The information processing device according to supplementary note 1.

(Additional note 3)
A second method for causing a second communication terminal associated with a second user who is a connection source to notify at least one of the name of the second user, the organization to which the second user belongs, and the position of the second user. a fifth processing means for outputting guidance;
a sixth processing means for authenticating a voiceprint of a voice that is a response to the second guidance;
seventh processing means for communicating completion of the communication connection of the second communication terminal to the second communication terminal if the authentication by the sixth processing means is successful;
The information processing device according to supplementary note 1 or supplementary note 2, comprising:

(Additional note 4)
eighth processing means for receiving a connection request from the second communication terminal;
Equipped with
The fifth processing means includes:
outputting the second guidance when the eighth processing means receives the connection request;
The information processing device according to appendix 3.

(Appendix 5)
A communication terminal that communicates with an information processing device according to the communication protocol of the information processing device according to any one of Supplementary Notes 1 to 4.

(Appendix 6)
The information processing device according to any one of Supplementary notes 1 to 4,
the first communication terminal;
A communication system equipped with

(Appendix 7)
A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. Outputting guidance;
authenticating a voiceprint of a voice that is a response to the first guidance;
If the authentication is successful, notifying the first communication terminal of completion of the communication connection of the first communication terminal;
Information processing methods including.

(Appendix 8)
to the computer,
A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. Outputting guidance;
authenticating a voiceprint of a voice that is a response to the first guidance;
If the authentication is successful, notifying the first communication terminal of completion of the communication connection of the first communication terminal;
A program to run.

1...Telephone system 5...Computer 7...Main memory 8...Storage 9...Interface 10...Telephone terminal 20...Switching device 101...Man-machine IF
102, 203... Exchange control unit 103, 201... Exchange connection IF
202...Analysis unit 204...Storage unit NW...Telephone switching network

Claims (8)

A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. a first processing means for outputting guidance;
a second processing means for authenticating a voiceprint of a voice that is a response to the first guidance;
a third processing means for notifying the first communication terminal of completion of the communication connection of the first communication terminal if the authentication by the second processing means is successful;
An information processing device comprising: fourth processing means for receiving an incoming call response from the first communication terminal;
Equipped with
The first processing means includes:
outputting the first guidance when the fourth processing means receives the incoming call response;
The information processing device according to claim 1. A second method for causing a second communication terminal associated with a second user who is a connection source to notify at least one of the name of the second user, the organization to which the second user belongs, and the position of the second user. a fifth processing means for outputting guidance;
a sixth processing means for authenticating a voiceprint of a voice that is a response to the second guidance;
seventh processing means for communicating completion of the communication connection of the second communication terminal to the second communication terminal if the authentication by the sixth processing means is successful;
The information processing device according to claim 1 or claim 2, comprising: eighth processing means for receiving a connection request from the second communication terminal;
Equipped with
The fifth processing means includes:
outputting the second guidance when the eighth processing means receives the connection request;
The information processing device according to claim 3. A communication terminal that communicates with the information processing device according to the communication protocol of the information processing device according to claim 1. The information processing device according to claim 1;
the first communication terminal;
A communication system equipped with A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. Outputting guidance;
authenticating a voiceprint of a voice that is a response to the first guidance;
If the authentication is successful, notifying the first communication terminal of completion of the communication connection of the first communication terminal;
Information processing methods including. to the computer,
A first communication terminal associated with a first user to be connected to notify at least one of the first user's name, the organization to which the first user belongs, and the position of the first user. Outputting guidance;
authenticating a voiceprint of a voice that is a response to the first guidance;
If the authentication is successful, notifying the first communication terminal of completion of the communication connection of the first communication terminal;
A program to run.

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