JP2013192066A - Intercommunication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable remote settlement that is safe and easy-to-use with enhanced crime prevention and convenience when payment settlement is made between a visiting payment requester and a resident payer.SOLUTION: When an entrance machine communication unit 14 of a main entrance machine (entrance) 1 and residential main phone speech sections 20 of residential machines 2a, 2b. . are connected thorough connection lines L1 and L2, and audio signals are transmitted and received therebetween to establish a phone call, a billing amount input by a billing operation unit 11 in the main entrance machine is encrypted and sent to a residential machine, where the billing amount is determined whether it is valid by decryption. A payment information reading unit 24 in the residential machine reads payment information of the billing amount determined to be valid from a payment portable means 5a, 5b. . . and encrypts the payment information to send it to the main entrance machine, followed by decryption in the main entrance machine to determine whether the payment information is valid.

Description

  The present invention relates to an intercom system in which a visitor requests a settlement procedure for a resident payer, and more particularly to an intercom system capable of remote settlement.

  Conventionally, when a visitor requests a settlement procedure for a resident payer, for example, a visitor who is at the entrance of the dwelling unit directly hands over a settlement medium or settlement information to a resident payer in the residence. In addition, the authentication procedure is transmitted verbally using an intercom call, or a settlement procedure is operated in cooperation with a third-party certification organization.

  Further, according to the visitor requester, it is also possible to select an online settlement means via a network such as the Internet without the resident payer directly visiting the dwelling unit in the room. As such online payment means, for example, a management system is disclosed in which a predetermined payment amount is transmitted to a payment server such as a credit company connected via a network and a payment process is requested. (For example, refer to Patent Document 1).

JP 2006-277026 A

  However, in various settlement procedures described in the background art, when a visitor visits a resident payer directly, even if the resident payer's convenience is inconvenient, he / she must face it directly at the timing of this visit. Convenience was bad.

  In addition, when verbally communicating authentication information using an intercom call, measures sufficient to ensure crime prevention, such as spoofing a visitor or resident payer, eavesdropping by a third party, and information leakage Was not made.

  Also, in cooperation with a third-party certification body, it may be necessary to expand or change the facilities, etc., and the resident payer's pre-procedures and troubles such as preparation are generated, which is desirable for the resident payer. There could be no expenditure or unexpected damage.

  Furthermore, when executing the online payment means, it is necessary to introduce or contract an online payment service designated by the visitor even if the resident payer does not allow the visitor to request the visitor in advance.

  The present invention has been made to solve these difficulties, and performs a payment procedure for a resident payer by a visitor without an additional contract such as an online payment service or expansion / change of system facilities. Accordingly, an object of the present invention is to provide an intercom system that enables safe and easy remote settlement with improved crime prevention and convenience.

  In order to achieve the above-mentioned object, the intercom system according to the first aspect of the present invention is installed at a house entrance, and a call for calling a resident payer when a visitor requests a settlement procedure for the resident payer. An operation unit and an entrance requester that has an entrance unit call unit for establishing a call by transmitting and receiving audio signals to and from the resident payer, and an answering machine that is installed in the house and responds to a call from the visitor requester A response operation unit for performing communication and a room machine having a room machine call unit for establishing a call by transmitting and receiving audio signals to and from the visitor, and between the entrance machine and the room machine This is an intercom system that is connected to each other via a communication line for transmitting and receiving intercom signals such as a call signal and a voice signal for calling. The entrance machine is provided with a billing operation unit that is operated by a visitor requester and inputs a billing amount necessary for a settlement procedure. The room machine is operated by the resident payer when a call is established by using the room machine call unit, and a payment operation unit for selecting a payment method necessary to settle the billed amount, and a payment selected by the payment operation unit. Communicates the payment information reading unit for reading the payment information related to the bill amount stored in the payment carrying means carried by the resident payer corresponding to the method and the payment information read by the payment information reading unit And a room interface for sending to the entrance machine via the line. The entrance machine includes an entrance machine interface for receiving payment information transmitted from the living room machine via a communication line.

  According to the intercom system of this aspect, when the requesting visitor performs the settlement procedure for the resident payer, the transmission timing of the billing information transmitted from the entrance machine to the living room machine and the payment information transmitted from the living room machine to the entrance machine are set. Since the sending timing is limited to when a call is established between the visitor and the resident payer, the visitor does not need to visit the resident payer directly, and the resident payer is inconvenient Since the settlement procedure can be easily stopped, convenience for the resident payer is enhanced.

  The intercom system according to the second aspect of the present invention is the intercom system according to the first aspect of the present invention, wherein the entrance machine includes a video imaging unit for capturing a video of the visitor and generating a video signal. Yes. The room machine includes a room machine display unit for outputting the video signal generated by the video image pickup unit of the entrance machine.

  According to the intercom system of this aspect, when the visit requester performs the settlement procedure addressed to the resident payer, as a premise, the visitor payer can visually confirm the resident payer based on the video of the visitor requester. In addition to the auditory confirmation at the time of establishment of the call, it becomes possible to more effectively discriminate the visitor, and the crime prevention property is improved.

  The intercom system according to the third aspect of the present invention is the intercom system according to the first aspect or the second aspect of the present invention, wherein the entrance machine is in the billing portable storage unit of the billing carrying means carried by the visitor. Billing information for reading the stored billing public key, the billing secret key that forms a pair with the billing public key, and the visitor signature information of the contents signed by the visitor corresponding to the billing public key The visitor signature information read by the reading unit and the billing information reading unit is encrypted with the secret key for billing, and the public key for billing read by the billing information reading unit is transmitted from the entrance interface via the communication line. A billing encryption / decryption processing unit for sending to the living room machine. The room unit is a room unit storage unit for storing a pre-trusted public key for payment provided in advance by an external organization such as an authentication company, and an encrypted transmission transmitted from the entrance unit via a communication line. And a payment encryption / decryption processing unit for decrypting the visitor requester signature information with the payment pre-trusted public key read from the room storage unit.

  According to the intercom system of this aspect, in order for the visitor to perform the settlement procedure addressed to the resident payer, the premise that the visitor's identity and the public key for request are valid according to the resident payer. Can be confirmed before a specific payment procedure. For example, even if the visitor is impersonating, it can be easily determined and the crime prevention property is improved.

  The intercom system according to the fourth aspect of the present invention is the interphone system according to the third aspect of the present invention, wherein the room unit storage unit of the room unit includes a payment public key and a payment secret that forms a pair with the payment public key. It has a function for storing the resident payer signature information of the contents signed by the resident payer corresponding to the key and the payment public key. The encryption / decryption processing unit for payment of the room machine encrypts the resident payer signature information read from the room machine storage unit with the payment private key, and communicates from the room machine interface together with the payment public key read from the room machine storage unit. It has a function to send to the entrance machine via the line. The billing carrying storage unit of the billing carrying means has a function for storing a billing pre-trusted public key provided in advance from an external organization such as an authentication business. The billing encryption / decryption processing unit of the front door unit stores the encrypted resident payer signature information transmitted from the room machine via the communication line by the billing information reading unit of the billing portable means. A function of decrypting with the pre-trusted public key for billing read from the unit.

  According to the intercom system of this aspect, when the visitor requester performs the settlement procedure for the resident payer, the premises payer's identity and its signature information are valid according to the visitor requester. This can be confirmed before notification of a specific billing amount. For example, even if a resident payer is impersonating, it can be easily determined and crime prevention is improved.

  The intercom system according to the fifth aspect of the present invention is the interphone system according to the third or fourth aspect of the present invention, wherein the billing encryption / decryption processing unit of the front door is input by operating the billing operation unit. The billing amount is encrypted with a payment public key or a billing private key. The payment encryption / decryption processing unit of the living room machine has a function of decrypting the encrypted charge amount transmitted from the entrance machine via the communication line by using the payment private key or the charge public key. ing.

  According to the intercom system of this aspect, when the visitor requests the settlement procedure for the resident payer, the billing amount from the visitor can be notified to the resident payer as legitimate and safe information. In addition, since it is not necessary to transmit the authentication verbally like a voice signal at the time of establishment of the call, the occurrence of wiretapping or information leakage by a third party can be prevented and crime prevention can be improved.

  The interphone system according to the sixth aspect of the present invention is the interphone system according to any one of the third aspect to the fifth aspect of the present invention, wherein the payment encryption / decryption processing unit of the living-room unit includes the payment information. It has a function of encrypting payment information read by the reading unit with a public key for billing. The billing encryption / decryption processing unit of the entrance machine has a function of decrypting the encrypted payment information transmitted from the room machine via the communication line, using the secret key for billing.

  According to the intercom system of this aspect, when the visitor requests the settlement procedure for the resident payer, the payment information by the resident payer selected corresponding to the amount charged by the visitor is stored in a legitimate and secure manner. It is possible to notify the visitor as information.

  An intercom system according to a seventh aspect of the present invention is the collective installed in the collective entrance of the collective housing in any one of the first to sixth aspects of the present invention. It is a front door machine, and a collective front door machine is connected to a room machine via the control machine which performs transmission / reception control of the intercom signal transmitted on the line of a communication line. According to the intercom system of this aspect, it can be applied to the system for collective housing where the visitor requests the settlement procedure for the resident payer.

  An intercom system according to an eighth aspect of the present invention is the communication line according to any one of the first to seventh aspects of the present invention, wherein the communication line can be connected to an external network such as the Internet. An external interface is connected. The external interface is a network monitoring unit for blocking the connection with the external network until the payment completion information from the entrance machine is detected when the billing information from the entrance machine for the payment procedure is detected. It has.

  According to the intercom system of this aspect, when the visitor requests the settlement procedure for the resident payer, the connection with the external network such as the Internet is interrupted during the procedure, so that information leakage occurs. Prevention of crime improves security.

According to the intercom system of the present invention, there is no need for a separate contract such as an online payment service or expansion / change of system facilities, and the visitor does not need to visit the resident payer directly. The settlement procedure for the resident payer by the claimant can be performed safely and easily when the call is established. In particular, for the resident payer, it is possible to easily confirm the legitimacy of the requester of the visitor, the amount of the charge, etc., and the crime prevention property when performing a specific payment procedure is improved. On the other hand, it is possible for the visitor to check the legitimacy of the resident payer's identity and payment information related to the payment procedure, thereby improving crime prevention.
In addition, payment procedures with improved convenience can be performed.

  Further, according to the intercom system of the present invention, the connection between the visitor and the external network such as the Internet is interrupted until the settlement request for the resident payer is started and the procedure is completed. Crime prevention is improved by preventing the occurrence of information leakage.

BRIEF DESCRIPTION OF THE DRAWINGS The system explanatory drawing which shows the whole structure of the intercom system by the Example of this invention. The block diagram which shows the specific structure of a collective entrance machine (entrance machine) in the intercom system by the Example of this invention. The block diagram which shows the specific structure of a room machine in the intercom system by the Example of this invention. The flowchart figure which is the payment procedure concerning the intercom system by the Example of this invention, Comprising: A 1st billing / payment operation | movement. The flowchart figure which is the payment procedure concerning the intercom system by the Example of this invention, Comprising: A 2nd billing / payment operation | movement.

  Embodiments to which the intercom system of the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is a system explanatory diagram showing an overall configuration of an intercom system according to an embodiment of the present invention. This intercom system is, for example, a system that is applied to a housing complex such as a condominium. The intercom system includes a collective entrance machine 1 installed at a collective entrance and a plurality of dwelling units such as a room A, a room B, and so on. .. Are connected to each of the room units 2a, 2b,... Installed in the dwelling unit via the entrance unit line L1 and the room unit line L2. And a controller 3 for controlling the room units 2a, 2b,. The entrance machine line L1 and the room unit line L2 are communication lines, respectively, and a call signal and a video signal at the time of a call from the collective entrance unit 1 to the room unit 2a, 2b,. Etc., and transmission / reception of an audio signal (interphone signal) at the time of a call (call establishment) established between the collective entrance machine 1 and a specific room unit.

  The collective entrance machine 1 shown in the figure includes a call operation unit 10, a billing operation unit 11, a video imaging unit 12, an entrance machine display unit 13, an entrance machine call unit 14, and a billing information reading unit 15.

  In the collective entrance machine 1, the call operation unit 10, for example, a visitor requester who performs a settlement procedure at a collective entrance, selects a resident payer in a specific residence that is the target of the settlement procedure. For example, a numeric keypad, a call button, and a touch panel on the screen of the entrance display unit 13 are suitable.

  The billing operation unit 11 is operated by a visitor biller and is used to input a billing amount necessary for a settlement procedure. For example, a numeric keypad or a touch panel on the screen of the entrance display unit 13 is preferable. Is done.

  The video imaging unit 12 is for capturing a video of a visitor who has performed a predetermined call operation in the call operation unit 10 (including video in an environment around the collective entrance) and generating a video signal. For example, various cameras such as a CCD and a CMOS are suitable.

  The entrance machine display unit 13 is for displaying operation information and operation display information related to the call operation unit 10 and the billing operation unit 11, and for example, various display media such as an LCD and an organic EL display are suitable. Is done.

  The entrance machine call unit 14 transmits and receives an audio signal for a visitor requester to establish a call with a resident payer, and includes an entrance machine microphone 140 and an entrance machine speaker 141. The entrance machine call unit 14 is not limited to a hands-free call (speaking call) mode using the entrance machine microphone 140 and the entrance machine speaker 141 as described above, and a handset using a handset (not shown). Calls can also be applied.

  The billing information reading unit 15 is a billing public key stored in the billing carrying storage unit 40 of the billing portable terminal 4 such as a PC or PDA, which constitutes a billing carrying unit carried by the visitor. This is for reading the billing private key that forms a pair with the billing public key and the visitor signature information of the content signed by the visitor corresponding to the billing public key. The billing information reading unit 15 is a built-in unit incorporated in the equipment of the collective entrance machine as long as it is connected to and controlled by the entrance machine CPU 17 described later (shown in the block diagram of FIG. 2) of the collective entrance machine 1. Any type of external connection type that is wired or connected separately from the mold or the collective entrance machine may be used.

  The billing portable storage unit 40 of the billing portable terminal 4 includes not only the aforementioned billing public key, billing secret key, and visitor signature information, but also an authentication organization such as an external organization such as Verisign ( A pre-trusted public key for billing provided in advance from (not shown) can be stored at the time of factory shipment or the like. According to the billing portable storage unit 40, a storage unit that stores a billing public key, a billing secret key, and a visitor requester signature information, and a storage unit that stores a billing pre-trusted public key, It can also be provided as a separate storage unit.

  The room units 2a, 2b,... Shown in the figure have the same configuration, and the room unit call unit 20, response operation unit 21, payment operation unit 22, room unit display unit 23, payment information reading unit. 24 and a room machine storage unit 25 are provided.

  In this room machine 2a, 2b,..., The room machine call unit 20 transmits and receives an audio signal for the resident payer to establish a call with the visitor requester. 200 and a room unit speaker 201 are provided. Further, the room machine speaker 201 of the room machine call unit 200 confirms not only the above-mentioned call function but also a ringing sound or a voice message indicating that a call from the visitor has been made, and that the settlement procedure by the visitor has been completed. Sounds and voice messages can be output. The room unit call unit 20 is not limited to a hands-free call (speaking call) mode using the room unit microphone 200 and the room unit speaker 201 as described above, and a handset using a handset (not shown). Calls can also be applied.

  The response operation unit 21 is for the resident payer to answer the call from the visitor and to establish a call by using the room unit call unit 20 and to perform an operation to end the established call. Thus, for example, a call button or a touch panel on the screen of the room display unit 23 is suitable.

  The payment operation unit 22 is operated by the resident payer at the time of a call (establishment of the call) by using the room unit call unit 20, and settles the amount to be paid by the resident payer for the payment procedure by the visitor requester. For example, a touch panel on the screen of the living room display 23 is suitable.

  The room unit display unit 23 displays the video signal generated by the video imaging unit 12 of the collective entrance 1 and displays a call message and picture data indicating that there is a call from the visitor. For example, various display media such as an LCD and an organic EL display are suitable. In addition to the video image output function and the call notification function described above, the room display unit 23 displays not only a specific content relating to the payment procedure by the visitor but also a confirmation message and picture data indicating that the payment procedure has been completed. Can be displayed.

  The payment information reading unit 24 pays for the above-mentioned bills stored in the payment carrying means 5a, 5b,... Such as a credit card, IC card, mobile phone, smartphone, etc. carried by the resident payer. For reading information, various data reading media such as a magnetic card reader and an IC card reader are suitable. As long as the payment information reading unit 24 is connected to and controlled by the room machine CPU 27 described later (shown in the block diagram of FIG. 3) of the room machines 2a, 2b,... It may be either a built-in type that is built-in, or an external connection type that is connected separately from the room unit, for example, by wire connection.

  The room machine storage unit 25 receives the payment public key, the payment private key that forms a pair with the payment public key, and the resident payer signature information that is signed by the resident payer corresponding to the payment public key. In addition to saving, a pre-paid public key for payment provided in advance by an authentication company, for example, an external organization (not shown) such as VeriSign, is saved at the time of factory shipment. Further, as the room machine storage unit 25 and the above-mentioned billing portable storage unit 40 (of the billing portable terminal 4), various storage media such as ROM, RAM, and EEPROM are suitable, for example.

  In addition, according to the room machine storage unit 25, a storage unit in which a payment public key, a payment private key, and a resident payer signature information are stored, and a storage unit in which a payment pre-trusted public key is stored, It can also be provided as a separate storage unit.

  Further, the controller 3 shown in the figure is connected to an entrance unit line L1 and a room unit line L2 constituting a communication line, and can be connected to an external network 6 such as the Internet (hereinafter referred to as an external I / F). .) 30. In the external I / F 30, when the billing information from the collective entrance machine 1 related to the settlement procedure is detected via the entrance machine line L1, the settlement completion information from the collective entrance machine 1 is detected. A network monitoring unit 300 for cutting off the connection with the external network 6 is provided.

  Next, a specific configuration of the collective entrance machine 1 will be described with reference to the block diagram of FIG. The collective entrance machine 1 shown in the figure includes a call operation unit 10, a billing operation unit 11, a video imaging unit 12, an entrance machine display unit 13, an entrance machine call unit 14, a billing information reading unit 15, and a billing information reading unit. An encryption / decryption processing unit 16, an entrance machine CPU 17, and an entrance machine interface (hereinafter referred to as an entrance machine I / F) 18 are provided.

  In this collective entrance 1, the billing encryption / decryption processing unit 16 has the above-mentioned visitor signature as the encryption function read from the billing storage unit 40 of the billing portable terminal 4 by the billing information reading unit 15. The information is encrypted with the private key for billing, and the public key for billing read in the same way, from the front door I / F 18 (connected to the front door CPU 17) via the front door line L1, the controller 3, and the room line L2. The resident payer sends the bill to the room unit in the resident unit in the room, and encrypts the bill input by using the billing operation unit 11 with the payment public key or the billing secret key. The resident payer can send out to the room machine in the house in the room through a similar route. On the other hand, the billing encryption / decryption processing unit 16 uses the billing information reading unit 15 to transmit the encrypted resident payer signature information transmitted from the room units 2a, 2b,. Decrypted by the above-mentioned pre-trusted public key for billing read from the billing storage unit 40 of the billing portable terminal 4, and also the encrypted payment transmitted from the room units 2a, 2b,. The information can be decrypted with the aforementioned billing secret key.

  The entrance machine CPU 17 is for controlling each component of the collective entrance machine. Further, the front door I / F 18 is a signal transmission path from the video imaging unit 12 to the front door line L1, and a bidirectional signal transmission path between the front door communication section 14 and the front door line L1 (downward / upward communication path). ), To form bidirectional signal transmission paths between the entrance machine CPU 17 and the entrance machine line L1.

  Further, according to the collective entrance machine 1, not only the above-described components (10, 11, 12, 13, 14, 15, 16, 17, 18) but also data output from the entrance machine CPU 17 as shown by the broken lines. Can also be provided with an output interface (output I / F). The function of the output I / F can be provided in the billing information reading unit 15.

  Next, a specific configuration of the room units 2a, 2b,... Will be described with reference to the block diagram of FIG. The room units 2a, 2b,... Shown in the figure include the room unit call unit 20, response operation unit 21, payment operation unit 22, room unit display unit 23, payment information reading unit 24, and room unit storage. A unit 25, a payment encryption / decryption processing unit 26, a room unit CPU 27, and a room unit interface (hereinafter referred to as a room unit I / F) 28 are provided.

  In this room machine 2a, 2b,..., The payment encryption / decryption processing unit 26 encrypts the resident payer signature information read from the room machine storage unit 25 with the payment secret key as its encryption function, Similarly, it is sent to the collective entrance machine 1 via the room machine line L2, the controller 3, and the entrance machine line L from the room machine I / F 28 (connected to the room machine CPU 27) together with the public key for payment to be read. The payment information read from the payment carrying means 5a, 5b,... By the payment information reading unit 24 is encrypted with the above-described public key for billing transmitted from the collective entrance machine 1, and the same set is obtained through the same route. Can be sent to the entrance machine. On the other hand, the payment encryption / decryption processing unit 26 uses, as its decryption function, the encrypted visitor signature information transmitted from the collective entrance machine 1 through the same path as the above-described public key for billing to the room. In addition to decrypting with the payment pre-trusted public key read from the machine storage unit 25, the billing amount transmitted from the collective entrance machine 1 through the same route as the above-described billing public key and visitor requester signature information Such information) can be decrypted with the private key for payment read from the room storage unit 25 or the public key for billing.

  The room machine CPU 27 is for controlling each part of the room machine. In addition, the room unit I / F 28 is a bidirectional signal transmission path (downward / upward direction call path) between the room unit call unit 20 and the room unit line L2, and a signal from the room unit line L2 to the room unit display unit 23. This is for forming a bidirectional signal transmission path between the transmission path, the room machine CPU 27 and the room machine line L2.

  In the intercom system according to the embodiment of the present invention configured as described above, the flowcharts of FIGS. 1 to 3 and the flowchart of FIG. The second billing / payment operation will be described with reference to the flowchart of FIG.

  Among the residents in each residence of the apartment house shown in FIG. 1, here, when the resident in the room A is the resident payer who is subject to the settlement procedure, According to this, the above-mentioned billing public key, billing private key visitor signature information, and billing pre-trusted public key are respectively stored in the billing portable storage unit 40 of the billing portable terminal 4 carried by itself. Let me. In addition, the above-described public key for payment, private key for payment, resident payer signature information and payment for the room unit storage unit 25 of the room units 2a, 2b,. Assume that each pre-trusted public key is stored in advance.

  Next, according to the visitor who carries the billing portable terminal 4, the call operation unit 10 of the collective entrance 1 shown in FIG. 1 and FIG. A predetermined calling operation for calling a resident payer in the room is performed. Upon detecting this operation, the entrance CPU 17 receives the call signal to which the room number for designating the room 2a in the room A as the call destination and the door number indicating the collective entrance 1 as the call source are added. At the same time, the video imaging unit 11 is controlled to start imaging of the video of the visitor who performed the call operation (including video in the surrounding environment of the collective entrance), thereby generating a video signal.

  Further, the calling signal generated by the entrance CPU 17 of the collective entrance 1 and the video signal generated by the image capturing unit 11 are respectively transmitted from the entrance I / F 18 to the entrance line L1 in a predetermined transmission format. Is transmitted by frame to the room unit I / F 28 of the room units 2a, 2b,... Shown in FIG.

  In each of the room units 2a, 2b,..., The room unit CPU 27 includes a room number added to the call signal received by the room unit I / F 28 and a room unit number assigned in advance to the own room unit. Only when the room number matches, the call notification that there is a call from the visitor requester, the ringing sound or voice message from the room machine speaker 201 of the room machine call unit 20, It can be performed by displaying a call message or picture data on the machine display unit 23, and further, the room machine display unit 23 is controlled to a state in which video can be output. Here, only the room unit CPU 27 of the room unit 2a has the same room unit number, and the above-described calling notification is performed, and the video signal received by the room unit I / F 28, that is, the video imaging of the collective entrance unit 1 is performed. The video of the visitor who is imaged by the unit 11 can be displayed on the room machine display unit 23.

  Next, the resident payer in the room A who confirmed that there was a call from the visitor based on the call notification and the video output as described above is shown in FIGS. When a predetermined response operation is performed using the response operation unit 21 of the room machine 2a shown, control of the room machine CPU 27, the controller 3, and the entrance machine CPU 17 of the collective door machine 1 shown in FIG. (Not described)), the room machine I / F 28, the room machine line L2, the controller 3, the entrance machine line L1, the entrance of the collective entrance machine 1 from the room machine microphone 200 of the room machine call unit 20 used by the resident payer The signal transmission path (upward direction call path) to the entrance speaker 141 of the entrance unit call unit 14 used by the visitor via the machine I / F 18 and the entrance unit call unit 14 used by the visitor From front door microphone 140 to front door I / F18, front door line 1. Signal transmission path to the room machine speaker 201 of the room machine call unit 20 used by the resident payer via the room machine I / F 28 of the room machine line L2 and the room machine 2a. And a voice call is transmitted / received via the formed signal transmission path to establish a call.

At the time of the establishment of the call as described above, the visitor requester can notify the resident payer in the room A that the settlement procedure is necessary. On the other hand, according to this resident payer, since it is necessary to confirm the legitimacy of the visitor in advance in order to improve crime prevention before starting a specific settlement procedure, Notification to send to the room 2a the billing public key stored in the billing portable storage unit 40 and the visitor signature information of the contents signed by the visitor corresponding to the billing public key can do.
“First Billing / Payment Operation (See FIG. 4)”
Next, as the first billing / payment operation, when the settlement procedure is started when the above-described call is established (step ST1), according to the visitor who requested, FIG. 1 and FIG. The billing public key, the billing secret key, and the visitor signature information stored in the billing portable storage unit 40 of the billing portable terminal 4 shown in FIG. Make it.

  Further, the entrance machine CPU 17 of the collective entrance machine 1 controls the billing encryption / decryption processing unit 16, and among the billing public key billing private key and visitor signature information read by the billing information reading unit 15. For encrypting the visitor requester signature information with the request private key and designating the room 2a in the room A as the transmission destination in the public key for request and the encrypted visitor requester signature information. A billing information signal is generated to which the room number and the entrance number indicating the collective entrance 1 that is the transmission source are added. This billing information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Shown in FIG. 3 via a signal transmission path similar to the call signal described above (step ST2).

  In the controller 3, the network monitoring unit 300 of the external I / F 30 connected to the entrance machine line L 1 and the living room line L 2 receives the billing information signal from the collective entrance machine 1, and the like. The connection with the external network 6 can be cut off.

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the billing information signal received by the room unit I / F 28 and a room unit number assigned in advance to the own room unit. Only when the room unit number matches, it is determined that the public key for billing and the encrypted visitor requester signature information are the key and information addressed to the own room unit, respectively. Here, only the room machine CPU 27 of the room machine 2a matches the room machine number, and it is determined that the billing public key and the encrypted visitor signature information are valid.

  Thereafter, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26, and the pre-paid for payment read from the room machine storage unit 25 for the visitor signature information determined to be valid. By decrypting with the public key, it is determined that the visitor's identity and the public key for billing are valid (step ST3), and the public key for payment and the private key for payment stored in the room storage unit 25 And resident payer signature information are read out.

  In addition, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26, and among the payment public key, payment private key, and resident payer signature information read from the room machine storage unit 25, The payer signature information is encrypted with the payment private key, and the entrance machine number for designating the collective entrance machine 1 as the transmission destination is transmitted to the above-described payment public key and encrypted residence payer signature information. A first payment information signal to which a room number indicating the room machine 2a in the original room A is added is generated. The first payment information signal is transmitted to the front door I / F 18 of the collective front door 1 via a signal transmission path opposite to the call signal and the billing information signal (step ST4).

  According to the room machine CPU 27 of the room machine 2a, for example, a confirmation message or picture data in the room machine display unit 23 is used for the information that the identity of the visitor and the public key for billing are valid as described above. The notice of residence can be notified by displaying.

  The entrance machine CPU 17 of the collective entrance machine 1 matches the entrance machine number added to the first payment information signal received by the entrance machine I / F 18 with the entrance machine number assigned in advance to the entrance machine. Then, it is determined that the public key for payment and the encrypted resident payer signature information are the key and information addressed to the entrance machine.

  Further, the entrance machine CPU 17 of the collective entrance 1 controls the billing encryption / decryption processing unit 16, and the billing information reading unit 15 uses the billing information reading unit 15 to bill the billing portable terminal 4 for billing information that is determined to be valid. By decrypting with the billing pre-trusted public key read from the portable storage unit 40, it is determined that the resident payer's identity and the payment public key are valid (step ST5).

  Furthermore, according to the entrance machine CPU 17 of the collective entrance machine 1, for example, a confirmation message or a picture on the entrance machine display unit 13 for the information that the identity of the resident payer and the public key for payment are valid, as described above. The requester can be notified by displaying the data.

  When the billing portable terminal 4 is provided with a display function, for example, a terminal display unit (not shown), the entrance machine CPU 17 of the collective entrance machine 1 can identify the identity of the resident payer as described above. By generating information that the payment public key is valid and sending it to the billing portable terminal 4 via the output I / F indicated by the broken line, for example, display of a confirmation message or picture data on the terminal display unit You can also notify the requester.

  Thereafter, the visitor requester inputs a billing amount necessary for the settlement procedure using the billing operation unit 11 of the collective entrance 1. Upon detecting this operation, the front door CPU 17 controls the billing encryption / decryption processing unit 16 to encrypt the billed amount with the public key for payment determined to be valid as described above. A billing amount information signal is generated by adding to the billing amount information a room number for designating the room unit 2a in the room A as a transmission destination, and an entrance unit number indicating the collective entrance device 1 as a transmission source. This billing amount information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Via the same signal transmission path as the call signal and the billing information signal (step ST6).

  When the billing portable terminal 4 is provided with an operation function, for example, a terminal operation unit (not shown), the visitor requester can use this terminal operation unit to calculate the amount required for the settlement procedure. It can also be inputted and read by the billing information reading unit 15 of the collective entrance 1.

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the billing amount information signal received by the room unit I / F 28 and a room unit assigned in advance to the own room unit. The billing amount information is determined to be the information addressed to the self-occupied room machine only when the room number is matched with the number. Here, only the room unit CPU 27 of the room unit 2a matches the room unit number, and it is determined that the billing amount information is valid.

  Further, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26 to decrypt the billing amount information determined to be valid by the payment secret key read from the room machine storage unit 25. Thus (step ST7), the specific billing amount necessary for the settlement procedure can be displayed on the room machine display unit 23 and notified to the resident payer, for example.

  Thereafter, the resident payer uses the payment operation unit 22 of the living room machine 2a to select a payment method necessary for paying the notified bill. Upon detecting this operation, the room machine CPU 27 controls the payment information reading unit 24 to read the payment information relating to the bill amount stored in the payment carrying means 5a corresponding to the selected payment method ( Step ST8).

  Further, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26 to determine that the payment information read by the payment information reading unit 24 is valid as described above. Encrypted with a key and added to this encrypted payment information is an entrance machine number for designating the collective entrance machine 1 as a transmission destination and a room machine number indicating the room machine 2a in the room A as a transmission source The generated second payment information signal is generated. The second payment information signal is transmitted to the entrance machine I / F 18 of the collective entrance machine 1 through the same signal transmission path as the first payment information signal (step ST9).

  The entrance machine CPU 17 of the collective entrance machine 1 matches the entrance machine number added to the second payment information signal received by the entrance machine I / F 18 with the entrance machine number assigned in advance to the entrance machine. Then, it is determined that the payment information is valid information addressed to the entrance machine.

  Further, the entrance CPU 17 of the collective entrance machine 1 controls the billing encryption / decryption processing unit 16 to decrypt the payment information determined to be valid with the above-mentioned secret key for billing, thereby making the resident payer It is determined that the payment information corresponding to the payment procedure is valid (step ST10).

  Further, according to the entrance machine CPU 17 of the collective entrance machine 1, for example, a confirmation message on the entrance machine display unit 13 or the information indicating that the payment information corresponding to the payment procedure by the resident payer is valid. The requester can be notified by displaying the picture data.

  When the billing portable terminal 4 has a display function, for example, a terminal display unit (not shown), the entrance machine CPU 17 of the collective entrance machine 1 performs the payment procedure by the resident payer as described above. Is generated and information is sent to the billing portable terminal 4 via an output I / F indicated by a broken line, for example, a confirmation message or picture data on the terminal display unit The requester can be notified by display.

  Thereafter, the entrance machine CPU 17 of the collective entrance machine 1 generates settlement completion information indicating that the settlement procedure has been completed normally, and designates the room unit 2a in the room A as the transmission destination for this settlement completion information. A settlement completion information signal is generated to which the room number and the entrance number indicating the collective entrance 1 as the transmission source are added. This settlement completion information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Via the same signal transmission path as the call signal, billing information signal and billing amount information signal described above ( Step ST11).

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the payment completion information signal received by the room unit I / F 28 and a room unit assigned in advance to the own room unit. The settlement completion information is determined to be the information addressed to the own room machine only when the room number is matched with the number. Here, only the room machine CPU 27 of the room machine 2a matches the room machine number, and it is determined that the payment completion information is valid. For example, a confirmation message or picture data to that effect is displayed on the room machine display unit 23. And / or by outputting a confirmation sound, a voice message, etc. from the room machine speaker 201 of the room machine call unit 20, it is possible to notify the resident visitor that the settlement procedure has been completed normally (steps ST12, ST13). ).

  Note that the visitor can also notify the resident payer of the notification that the settlement procedure has been completed as described above using a voice signal at the time of establishment of the call and using a voice message.

In the first billing / payment operation, according to the controller 3, the network monitoring unit 300 of the external I / F 30 connected to the entrance machine line L 1 and the living room line L 2 is connected from the collective entrance machine 1. When the payment completion information signal is received, it reconnects to the external network 6 such as the Internet, which has been continuously blocked since the reception of the billing information signal. By this control, the above-described various signals transmitted and received through the entrance machine line L1 and the room unit line L2 are not transmitted to the external network 6 until the external network 6 is disconnected and reconnected. Crime prevention is improved by preventing the occurrence of information leakage.
“Second billing / payment operation (see FIG. 5)”
Next, as a second billing / payment operation different from the first billing / payment operation described above, in starting the settlement procedure at the time of establishment of the call as described above (step ST51), according to the visitor requester, The billing public key, the billing secret key, and the visitor signature information stored in the billing portable storage unit 40 of the billing portable terminal 4 shown in FIG. 1 and FIG. It is read by the billing information reading unit 15 of the machine 1.

  Further, the entrance machine CPU 17 of the collective entrance machine 1 controls the billing encryption / decryption processing unit 16, and among the billing public key billing private key and visitor signature information read by the billing information reading unit 15. For encrypting the visitor requester signature information with the request private key and designating the room 2a in the room A as the transmission destination in the public key for request and the encrypted visitor requester signature information. A billing information signal is generated to which the room number and the entrance number indicating the collective entrance 1 that is the transmission source are added. This billing information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Shown in FIG. 3 via the same signal transmission path as the call signal (step ST52).

  In the controller 3, the network monitoring unit 300 of the external I / F 30 connected to the entrance machine line L 1 and the living room line L 2 receives the billing information signal from the collective entrance machine 1, and the like. The connection with the external network 6 can be cut off.

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the billing information signal received by the room unit I / F 28 and a room unit number assigned in advance to the own room unit. Only when the room unit number matches, it is determined that the public key for billing and the encrypted visitor requester signature information are the key and information addressed to the own room unit, respectively. Here, only the room machine CPU 27 of the room machine 2a matches the room machine number, and it is determined that the billing public key and the encrypted visitor signature information are valid.

  Thereafter, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26, and the pre-paid for payment read from the room machine storage unit 25 for the visitor signature information determined to be valid. By decrypting with the public key, it is determined that the visitor's identity and the public key for billing are valid (step ST53).

  Moreover, the room machine CPU 27 of the room machine 2a displays, for example, a confirmation message or picture data on the room machine display unit 23 with respect to the information that the visitor's identity and the billing public key are valid as described above. Can be notified to the residence notifier, and in the confirmation information to that effect, the entrance unit number for designating the collective entrance unit 1 as the transmission destination, and the room unit 2a indicating the room unit 2a in the room A as the transmission source A confirmation information signal with a number added is generated. This confirmation information signal is transmitted to the front door I / F 18 of the collective front door 1 via the signal transmission path opposite to the call signal and the billing information signal (step ST54).

  The entrance machine CPU 17 of the collective entrance machine 1 confirms that the entrance machine number added to the confirmation information signal received by the entrance machine I / F 18 matches the entrance machine number assigned to the entrance machine in advance. It is determined that the information is the information addressed to the entrance machine. According to the entrance machine CPU 17, the confirmation information as described above can be notified to the visitor by, for example, displaying a confirmation message or picture data on the entrance machine display unit 13.

  When the billing portable terminal 4 is provided with a display function, for example, a terminal display unit (not shown), the entrance machine CPU 17 of the collective entrance machine 1 generates the confirmation information as described above and generates a broken line. By sending it to the billing portable terminal 4 via the output I / F shown in FIG. 6, for example, it is possible to notify the visiting requester by displaying a confirmation message or picture data on the terminal display unit.

  Further, according to the resident payer, the notification of the confirmation information as described above can be notified to the visitor by using the voice signal at the time when the call is established, by the transmitted voice.

  Thereafter, the visitor requester inputs a billing amount necessary for the settlement procedure using the billing operation unit 11 of the collective entrance 1. Upon detecting this operation, the entrance CPU 17 controls the billing encryption / decryption processing unit 16 to encrypt the billing amount with the billing secret key read by the billing information reading unit 15 as described above. A billing amount information signal obtained by adding a room number for designating the room unit 2a in the room A as a transmission destination to the encrypted billing amount information and an entrance unit number indicating the collective entrance unit 1 as a transmission source. Generate. This billing amount information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Via the same signal transmission path as the call signal and the billing information signal (step ST55).

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the billing amount information signal received by the room unit I / F 28 and a room unit assigned in advance to the own room unit. The billing amount information is determined to be the information addressed to the self-occupied room machine only when the room number is matched with the number. Here, only the room unit CPU 27 of the room unit 2a matches the room unit number, and it is determined that the billing amount information is valid.

  Further, the room unit CPU 27 of the room unit 2a controls the payment encryption / decryption processing unit 26 to decrypt the billing amount information determined to be valid with the billing public key determined to be valid as described above. By making it (step ST56), the specific billing amount necessary for the settlement procedure can be displayed on the room machine display unit 23 and notified to the resident payer, for example.

  Thereafter, the resident payer uses the payment operation unit 22 of the living room machine 2a to select a payment method necessary for paying the notified bill. Upon detecting this operation, the room machine CPU 27 controls the payment information reading unit 24 to read the payment information relating to the bill amount stored in the payment carrying means 5a corresponding to the selected payment method ( Step ST57).

  Further, the room machine CPU 27 of the room machine 2a controls the payment encryption / decryption processing unit 26 to determine that the payment information read by the payment information reading unit 24 is valid as described above. Encrypted with a key and added to this encrypted payment information is an entrance machine number for designating the collective entrance machine 1 as a transmission destination and a room machine number indicating the room machine 2a in the room A as a transmission source Generate a payment information signal. This payment information signal is transmitted to the entrance machine I / F 18 of the collective entrance machine 1 through the same signal transmission path as the above-described confirmation information signal (step ST58).

  The entrance machine CPU 17 of the collective entrance machine 1 matches the entrance machine number added to the payment information signal received by the entrance machine I / F 18 with the entrance machine number assigned in advance to the entrance machine. It is determined that the information is valid information addressed to the entrance machine.

  Further, the entrance CPU 17 of the collective entrance machine 1 controls the billing encryption / decryption processing unit 16 to decrypt the payment information determined to be valid with the above-mentioned secret key for billing, thereby making the resident payer It is determined that the payment information corresponding to the payment procedure is valid (step ST59).

  Further, according to the entrance machine CPU 17 of the collective entrance machine 1, for example, a confirmation message on the entrance machine display unit 13 or the information indicating that the payment information corresponding to the payment procedure by the resident payer is valid. The requester can be notified by displaying the picture data.

  When the billing portable terminal 4 has a display function, for example, a terminal display unit (not shown), the entrance machine CPU 17 of the collective entrance machine 1 performs the payment procedure by the resident payer as described above. Is generated and information is sent to the billing portable terminal 4 via an output I / F indicated by a broken line, for example, a confirmation message or picture data on the terminal display unit The requester can be notified by display.

  Thereafter, the entrance machine CPU 17 of the collective entrance machine 1 generates settlement completion information indicating that the settlement procedure has been completed normally, and designates the room unit 2a in the room A as the transmission destination for this settlement completion information. A settlement completion information signal is generated to which the room number and the entrance number indicating the collective entrance 1 as the transmission source are added. This settlement completion information signal is transmitted to the room unit I / F 28 of the room units 2a, 2b,... Via the same signal transmission path as the call signal, billing information signal and billing amount information signal described above ( Step ST61).

  In each of the room units 2a, 2b,..., The room unit CPU 27 has a room number added to the payment completion information signal received by the room unit I / F 28 and a room unit assigned in advance to the own room unit. The settlement completion information is determined to be the information addressed to the own room machine only when the room number is matched with the number. Here, only the room machine CPU 27 of the room machine 2a matches the room machine number, and it is determined that the payment completion information is valid. For example, a confirmation message or picture data to that effect is displayed on the room machine display unit 23. And / or by outputting a confirmation sound or a voice message from the room unit speaker 201 of the room unit call unit 20, it is possible to notify the resident visitor that the settlement procedure has been completed normally (steps ST 62 and ST 63). ).

  Note that the visitor can also notify the resident payer of the notification that the settlement procedure has been completed as described above using a voice signal at the time of establishment of the call and using a voice message.

  In the second billing / payment operation, according to the controller 3, as in the first billing / payment operation described above, the network of the external I / F 30 connected to the entrance machine line L1 and the room unit line L2, respectively. -When the settlement monitoring unit 300 receives the payment completion information signal from the collective entrance machine 1, it reconnects to the external network 6 such as the Internet which has been continuously blocked from the time when the billing information signal is received. . By this control, the above-described various signals transmitted and received through the entrance machine line L1 and the room unit line L2 are not transmitted to the external network 6 until the external network 6 is disconnected and reconnected. Crime prevention is improved by preventing the occurrence of information leakage.

  The intercom system of the present invention has been described with a specific embodiment. However, the present invention is not limited to this embodiment, and as long as the effects of the present invention are exhibited, the apparatus has any configuration known so far. It goes without saying that can also be adopted.

  For example, according to the embodiment of the present invention, the collective entrance machine 1 installed at the collective entrance is applied as the entrance machine, but is not limited to this mode. For example, the entrance machine installed at the entrance of each dwelling unit of a detached house or an apartment house, that is, an entrance cordless handset can be applied.

  According to the embodiment of the present invention, communication lines are connected to each other and can be connected to an external network 6 such as the Internet, and payment information from the collective entrance machine 1 is detected via the entrance machine line L1. The controller 3 is provided with an external I / F 30 including a network monitoring unit 300 for blocking the connection with the external network 6 until the completion of settlement from the collective entrance machine 1 is detected. However, it is not limited to this embodiment. For example, the external I / F 30 having the same function is used in the circuit of the collective entrance machine 1, for example, the entrance machine I / F 18 (see FIG. 2), together with the controller 3 or instead of the controller 3. For example, each of the room units 2a, 2b,... Can be provided in the circuit of the room unit I / F 28 (see FIG. 3), which further prevents crimes by preventing information leakage. Enhanced.

  Furthermore, according to the embodiment of the present invention, a payment information reading unit that reads payment information, and a storage unit that stores a payment public key, a payment private key, resident payer signature information, and a payment pre-trusted public key, respectively. And an encryption / decryption processing unit for payment in the room units 2a, 2b,... (Payment information reading unit 24, room unit storage unit 25 and payment encryption / decryption processing unit 26 shown in FIG. However, the present invention is not limited to this mode. For example, it can replace with living room machine 2a, 2b, ..., and can be provided in the control machine 3. FIG.

1 ... Collective entrance machine (entrance machine)
DESCRIPTION OF SYMBOLS 10 ... Calling operation part 11 ... Billing operation part 12 ... Image pick-up part 14 ... Entrance machine call part 15 ... Claim information reading part 16 ... Billing encryption / decryption processing part 18 ... Entrance machine I / F (entrance machine interface)
2a, 2b,..., Room machine 20 ... room machine call part 21 ... response operation part 22 ... payment operation part 23 ... room machine display part 24 ... payment information reading part 25 ... room machine Storage unit 26 …… Payment encryption / decryption processing unit 28 …… Room unit I / F (room unit interface)
3 …… Control device 4 …… Portable portable terminal (portable portable means)
40. Carrying storage unit for billing 5a, 5b, .... Payment carrying means L1 ... Entrance line (communication line)
L2: Living room line (communication line)

Claims (8)

A call operation unit (10) for calling a resident payer when the visitor performs a settlement procedure for a resident payer and an audio signal between the visitor and the resident payer. And an entrance unit (1) having an entrance unit communication unit (14) for establishing a call by transmitting and receiving, and a response operation unit (21) installed in the house for responding to a call from the visitor And a room machine (2a, 2b,...) Having a room machine call unit (20) for establishing a call by transmitting and receiving the audio signal to and from the visitor. An intercom system in which the entrance unit and the room unit are connected to each other via communication lines (L1, L2) for transmitting and receiving intercom signals such as a call signal and a voice signal for the call. And
The entrance machine includes a billing operation unit (11) that is operated by the visitor to input a billing amount necessary for the settlement procedure,
The room unit is operated by the resident payer when a call is established by using the room unit call unit, and a payment operation unit (22) for selecting a payment method required to settle the billed amount, and the payment Payment information for reading the payment information relating to the bill stored in the payment carrying means (5a, 5b,...) Carried by the resident payer corresponding to the payment method selected by the operation unit. A reading unit (24), and a room machine interface (28) for sending the payment information read by the payment information reading unit to the entrance machine via the communication line,
The intercom system, wherein the entrance machine includes an entrance machine interface (18) for receiving the payment information transmitted from the room machine via the communication line. The entrance machine includes a video imaging unit (12) for capturing a video of the visitor and generating a video signal,
The intercom system according to claim 1, wherein the room unit includes a room unit display unit (23) for outputting the video signal generated by the video imaging unit of the entrance unit. The entrance machine includes a billing public key stored in the billing carrying storage unit (40) of the billing carrying means (4) carried by the visitor, and a billing secret that forms a pair with the billing public key. A billing information reading unit (15) for reading visitor signature information of the content signed by the visitor corresponding to the key and the billing public key, and the bill information read by the billing information reading unit In order to encrypt visitor signature information with the billing secret key and send it to the office unit via the communication line from the entrance interface together with the billing public key read by the billing information reading unit A billing encryption / decryption processing unit (16).
The living room machine transmits the pre-trusted public key for payment provided in advance from an external organization such as an authentication company, etc., and the room machine storage unit (25) via the communication line from the entrance machine. A payment encryption / decryption processing unit (26) for decrypting the encrypted visitor signature information to be read with the payment pre-trusted public key read from the room storage unit. The intercom system according to claim 1 or 2, characterized by the above. The room machine storage unit of the room machine has a payment public key, a payment private key that forms a pair with the payment public key, and a residence of the contents signed by the resident payer corresponding to the payment public key. It has a function to store each payer signature information,
The payment encryption / decryption processing unit of the room machine encrypts the resident payer signature information read from the room machine storage unit with the payment secret key and reads the payment public information read from the room machine storage unit. A function for sending to the entrance machine via the communication line from the room interface with the key,
The billing storage unit of the billing means has a function for storing a pre-trusted public key for billing provided in advance from an external organization such as an authentication business,
The billing encryption / decryption processing unit of the entrance machine uses the billing information reading unit to transmit the encrypted resident payer signature information transmitted from the room machine via the communication line. 4. The intercom system according to claim 3, wherein the intercom system has a function of decrypting with the billing pre-trusted public key read from the billing portable storage unit of the carrying means. The billing encryption / decryption processing unit of the entrance machine has a function of encrypting the billing amount input by the operation of the billing operation unit with the public key for payment or the secret key for billing,
The encryption / decryption processing unit for payment of the living room machine decrypts the encrypted charge amount transmitted from the entrance machine via a communication line with the private key for payment or the public key for charge. 5. The intercom system according to claim 3 or 4, wherein the intercom system has a function of converting to an intercom system. The encryption / decryption processing unit for payment of the room machine has a function of encrypting the payment information read by the payment information reading unit with the public key for billing,
The billing encryption / decryption processing unit of the entrance machine has a function of decrypting the encrypted payment information transmitted from the room machine via the communication line using the secret key for billing. 6. The intercom system according to claim 3, wherein the intercom system is any one of claims 3 to 5. The entrance machine is a collective entrance machine installed at a collective entrance of an apartment house,
The said entrance machine is connected to the said room machine via the controller (3) which performs transmission / reception control of the said intercom signal transmitted on the line of the said communication line. Item 7. The intercom system according to any one of Items 6 above. An external interface (30) connectable to an external network such as the Internet is connected to the communication line,
When the billing information from the entrance machine for the settlement procedure is detected, the external interface blocks the connection with the external network until the settlement completion information from the entrance machine is detected. The intercom system according to any one of claims 1 to 7, further comprising a network monitoring unit (300).

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