JP2004194306A - Date and time defined voice recording system and date and time defined voice data authentication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a time defined voice recording system for recording a date and time to be authenticated, and a date and time defined voice data authentication system. <P>SOLUTION: A voice digital recording device 100 has time signal embedding means 122 for producing a phone call voice record 10 after embedding a time signal into the phone call voice record 10 and/or facsimile data which are not performed digital conversion, and comprises exchange record data holding means 112 for recording a time signal embedded phone call voice record after performing the digital conversion and for recording exchange record data 14 of the phone call voice record 10 in relation to a digital voice record, terminal operation recording means 113 for recording operation record data 15 of a terminal of an operator 2 in relation to the digital voice record, and time stamp acquiring means 123 for acquiring and holding a digital certificate 17 after acquiring the digital voice record, acquiring the exchange record data 14 and the operation record data 15 in relation to the digital voice record, and sending one directional functional value 16A of all of the data to a time stamp server 130. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a date and time voice recording system for recording a transaction by telephone call and determining the date and time of the recorded content, and a date and time determining voice data authentication system for notarizing a proof of the determined date and time.

  2. Description of the Related Art Conventionally, transactions by telephone have been performed at a call center such as a help desk, a customer service and a customer consultation desk, and at a financial institution such as a bank, securities, insurance, and a credit card. In the transaction by the call, a voice recording system for recording the contents of the call for reconfirmation of the contents of the call, confirmation of the complaint from the client side, correspondence of the operator and confirmation of the skill level, and the like is used.

As an audio recording system, there is a system in which a recorded analog audio recording is converted into digital data and recorded as digital audio recording on a recording medium at a high speed (for example, see Non-Patent Document 1).
Logit Co., Ltd., NiceLog (product name: Nice System Ltd.), page 1, [online], [searched on November 19, 1999], Internet <URL: http://www.logit.co.jp /products/index.html>

  However, in securities trading using the above-described voice recording system, since only voice data is recorded, time differences, misunderstandings, rapid stock price changes, etc., between the user who introduced the voice recording system and the client side. Due to the influence, the opinion between the user and the client may be different, which may lead to a litigation problem. In this case, it is difficult to prove the recording date and time of the audio data.

  In a conventional voice recording system, a recording start time of voice data and the like are recorded as a local time in a voice recording device having the voice recording system, and the recording of the local time is performed by a party who introduced the voice recording system. For this reason, there is a possibility that a difference may occur in the transaction establishment time between the parties involved in the transaction. Such a record of the local time has a problem that it cannot be notarized because the user can falsify it, and thus has no objectivity and weak proof ability.

  In view of such circumstances, an object of the present invention is to provide a date and time fixed voice recording system and a date and time fixed voice data authentication system that record a date and time that can be a notary.

  According to a first aspect of the present invention, there is provided a digital voice recording for converting a voice communication of a telephone connected to a public telephone network via a telephone exchange and / or facsimile data into a digital voice recording. Sending the digital voice record to a time stamp server that issues a digital certificate digitally signed by adding time information to electronic information consisting of a one-way function value of electronic data by using the device to obtain the digital certificate And a date / time-determined voice recording system for storing date-and-time determined voice recordings, wherein the voice / digital recording device converts the call voice recording and / or facsimile data before the digital conversion into a time signal acquired from the time stamp server at a constant interval. Time signal embedding method The voice digital recording device converts the time signal embedded call voice record into a digital voice record and records the digital voice record, and the call voice record and / or facsimile data held by the telephone exchange. An exchange record data holding unit for recording exchange record data in association with the digital audio record; and recording operation record data of a computer terminal used by an operator who is talking via the telephone in association with the digital audio record. A terminal operation recording means for acquiring the digital audio record, acquiring the exchange record data and the operation record data related to the digital audio record, and sending a one-way function value of all the data to the time stamp server. Time stamp to obtain and store the digital certificate In time determined audio recording system is characterized in that so as to comprise a flop acquisition means.

  According to a second aspect of the present invention, in the first aspect, the time stamp obtaining means obtains a one-way function value of the digital audio recording from the audio digital recording device. It is in.

  According to a third aspect of the present invention, in the first or second aspect, the time stamp server is mounted at a place remote from the audio digital recording device, and both are connected via a network. Date and time in the voice recording system.

  According to a fourth aspect of the present invention, in the first or second aspect, the time stamp server is mounted at a location adjacent to the audio digital recording device, but is independent of the user. And a date-and-time-determined voice recording system.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the time information of the time stamp server includes a reference time means for engraving a reliable reference time which is calibrated based on Coordinated Universal Time. A date and time fixed voice recording system characterized by being periodically calibrated by a notary center.

  According to a sixth aspect of the present invention, in the fifth aspect, the time notary center accesses the time stamp server via a network to acquire the ID and specific information of the time stamp server. The date and time is determined by the voice recording system.

  According to a seventh aspect of the present invention, in the fifth or sixth aspect, the time notary center transmits a time calibration certificate to the time stamp server when performing time calibration, and the time stamp server determines the time stamp. The date and time fixed voice recording system is characterized in that the digital certificate is issued including a calibration certificate.

  According to an eighth aspect of the present invention, in the sixth or seventh aspect, the specific information is a public key certificate of a public key paired with a secret key used by the time stamp server. It is in the fixed voice recording system.

  According to a ninth aspect of the present invention, a user is provided with a voice digital recording device for converting a call voice recording and / or facsimile data of a telephone connected to a public telephone network via a telephone exchange into digital voice recording. On the other hand, a content notary center that has a time stamp server that issues a digital certificate digitally signed by adding time information to electronic information composed of a one-way function value of electronic data, and the time information of the time stamp server A time notary center for calibration and a content verification center for verifying the validity of the digital certificate are provided so as to be connected to each other via a network, and the call voice before the voice digital recording device is digitally converted. The time signal obtained from the time stamp server is added to the recorded and / or facsimile data. A time signal embedding means for embedding at a regular interval to make a time signal embedded call voice record is provided, and the time digital signal embedded call voice record is digitally converted by the voice digital recording device and recorded as a digital voice record. Exchange record data holding means for recording exchange record data relating to the call voice record and / or facsimile data held by the telephone exchange in association with the digital voice record; and used by an operator who is talking via the telephone. Terminal operation recording means for recording operation record data of the computer terminal in association with the digital audio record; and obtaining the digital audio record and exchanging the exchange record data and the operation record data relating to the digital audio record. And obtain the one-way function value of all these data A time stamp acquisition unit for acquiring and storing the digital certificate by sending the digital certificate to a time stamp server, wherein the time notary center engraves a reliable reference time that has been calibrated based on Coordinated Universal Time, and Time calibration means for performing time calibration of a time stamp server, and information of a public key paired with a secret key uniquely used by the time stamp server or information for specifying the public key, Management means for storing the specific information included together with the ID of the time stamp server; and the content verification center includes verification means for verifying the validity of the digital certificate. It is in the date and time confirmed voice data authentication system.

  According to a tenth aspect of the present invention, in the ninth aspect, the time stamp acquiring means acquires a one-way function value of the digital audio recording from the audio digital recording device. In the system.

  According to an eleventh aspect of the present invention, in the ninth or tenth aspect, the time notary center receives a verification request based on the digital certificate and performs time verification based on information accumulated by the management unit. There is provided a date-and-time-determined voice data authentication system comprising a verification unit.

  According to a twelfth aspect of the present invention, in any one of the ninth to eleventh aspects, the verification means performs verification using data used for creating the digital certificate, such as the digital voice recording, together with the digital certificate. And a date and time fixed voice data authentication system.

  According to a thirteenth aspect of the present invention, in the twelfth aspect, the verification means previously acquires and stores the same data as the one-way function value sent to the time stamp server from the time stamp means. A date and time fixed voice data authentication system is characterized in that:

  According to a fourteenth aspect of the present invention, in any one of the ninth to thirteenth aspects, the time stamp server is placed close to the user's voice digital recording device and managed by the content notary center. The date and time fixed voice data authentication system is characterized in that:

  A fifteenth aspect of the present invention is the date / time-determined voice data authentication system according to any one of the ninth to fourteenth aspects, wherein the content notary center and the content verification center are integrally provided.

  According to the present invention, the digital certificate is obtained from the one-way function value of the digital voice recording, the exchange recording data and the terminal recording data and stored, so that the digital certificate of the digital voice recording, the exchange recording data and the terminal recording data is obtained. It is possible to prevent the included time information from being falsified. In addition, by placing the time stamp server at a location away from the user, falsification in the time stamp server can be reliably prevented, objectivity can be provided, and data that can be notarized can be obtained. .

  Further, by verifying the data by a content verification center independent of the user, the data can be made notarized with more objectivity.

  As described above, according to the date and time confirmation voice recording system and the date and time confirmation voice data authentication system of the present invention, it is possible to issue a digital certificate including time stamp information that can be notarized in the record of the call contents and / or the facsimile. it can.

  Hereinafter, the present invention will be described in detail based on embodiments.

  FIG. 1 is a diagram showing an outline of a date and time fixed voice recording system, and FIG. 2 is a diagram showing an outline of a date and time fixed voice recording.

  As shown in FIGS. 1 and 2, a company serving as a user has a telephone exchange 50 connected to a public telephone network and also connected to an operator 2, and a client exchanged via the telephone exchange 50. A date and time fixed voice recording center 100 for recording a call and facsimile data between the first and second operators and facsimile data together with a digital certificate to which time stamp information is added, as a date and time fixed voice recording center. The three-party organization is provided with a time notarization center 200 for calibrating the time information of the date and time confirmation voice recording center 100.

  The telephone exchange 50 is a private branch exchange (PBX) facility, and is installed in a company having a large number of telephone lines, and connects between extensions within the company or between a public network or a private line office line and an extension.

  Also, in the telephone exchange 50, as shown in FIG. 2, exchange record data 14 such as an incoming time, which is a time at which a telephone call arrives, an end time, which is a time at which a call ends, a connected extension number, and a caller number. Is stored.

  The date and time fixed voice recording center 100 stores a voice voice record 10 between the client 1 and the operator 2 exchanged via the telephone exchange 50, a digital voice record 13 obtained by digitally converting facsimile data, and an exchange record data 14 of the telephone exchange 50. A recording means 110 for recording digital recording data 16 such as terminal recording data 15 of the operator 2; a time signal 11 embedded in an analog communication voice recording 10; and a communication voice recording 10 or facsimile data between the client 1 and the operator 2. An application server 120 for acquiring and storing a digital certificate 17 to which time stamp information has been added to digital record data 16 related to the time stamp 11 and a time signal 11 embedded in the call voice record 10 or facsimile data of the application server 120. De A time stamp server 130 to issue a barrel certificate 17, and a storing storage server 140 a digital certificate 17 associated therewith together with the digital recording data 16 acquired in the application server 120 as date and time determined audio recording.

  The recording unit 110 includes a digital voice recording unit 111, an exchange recording data holding unit 112, and a terminal operation recording unit 113.

  The digital voice recording means 111 records the voice voice recording 10 between the client 1 and the operator 2 exchanged via the telephone exchange 50 or the time at which the time signal 11 is embedded by an application server 120 which will be described later in detail by facsimile. The signal-embedded call voice record 12 is converted to digital and recorded as a digital voice record 13.

  The digital conversion by the digital audio recording means 111 is preferably performed with high compression without deteriorating the sound quality. For example, PCM (Pulse Code Modulation) which converts analog data into digital data by A / D conversion at a constant period. Also, ADPCM (Adaptive Differentia Pulse Code Modulation) is a method of sampling analog data at regular intervals, taking the difference from the data immediately before sampling, and further compressing the data to reduce the data amount to digital data. And the like.

  The exchange record data holding means 112 is held by the above-described telephone exchange 50 in association with the digital voice record 13 relating to the call or facsimile data exchange between the client 1 and the operator 2 exchanged via the telephone exchange 50. The exchange record data 14 is recorded.

  Further, the terminal operation recording means 113 records the terminal record data 15 of the computer terminal operated by the operator 1 through the call with the client 2. The operation record data 15 includes, for example, image data obtained by capturing a screen displayed on a computer terminal, and numerical data input to the computer terminal by the operator 2.

  On the other hand, the application server 120 includes a built-in clock 121, a call voice record 10 for communication between the client 1 and the operator 2, or a time signal 11 obtained from the clock 121 by embedding the time signal 11 obtained from the clock 121 in facsimile data. A time signal embedding unit 122 for acquiring a digital certificate 17 related to the digital voice record 13, the exchange record data 14, and the operation record data 15 from the time stamp server 130, and storing the digital certificate 17 in the storage server 140. Is provided.

  The time signal embedding means 122 embeds the time signal 11 acquired from the clock 121 at predetermined intervals in the call voice record 10 composed of analog data between the client 1 and the operator 2 connected via the telephone exchange 50.

  More specifically, as shown in FIG. 3, the time signal embedding means 122 adds the time, which is digital data, to the call voice record 10 or facsimile data, The signal 11 is embedded to be a time signal embedded call voice recording 12.

  As described above, the time signal embedded call voice recording 12 in which the time signal 11 is embedded at predetermined intervals by the time signal embedding means 122 is digitally converted by the digital voice recording means 111 of the recording means 110 as described above. Recorded as record 13.

  At this time, since the time signal embedded call voice record 12 which is analog data in which the time signal 11 is embedded is digitally converted into the digital voice record 13, the embedding state of the time signal 11 is verified to be recorded by the digital voice recording means 111. The altered digital audio recording 13 can be overlooked.

  The time stamp obtaining unit 123 obtains the digital audio recording 13 recorded by the recording unit 110 described above, obtains the exchange recording data 14 and the terminal recording data 15 related to the digital audio recording 13, To the time stamp server 130, and obtains and stores the digital certificate 17 from the time stamp server 130.

  As described above, the digital recording data 16 and the digital certificate 17 obtained by the time stamp obtaining unit 123 are stored in the storage server 140 in the form of a database as the date and time fixed voice recording 18.

  Here, the digital recording data 16 created by the date and time confirmation voice recording center 100 and the time notary center 200 will be described in detail with reference to FIG.

  First, as shown in FIG. 2, the call voice record 10 or facsimile data between the client 1 and the operator 2 exchanged via the telephone exchange 50 is stored in the time signal embedding means 122 of the application server 120 by the time signal embedding call voice. Recorded as record 12. The call voice recording 12 with the time signal embedded therein is recorded as a digital voice record 13 by the digital voice recording means 111 of the recording means 110.

  Further, various data of the telephone exchange 50 for a call or facsimile communication between the operator 1 and the client 2 exchanged via the telephone exchange 50 are recorded as exchange record data 14 by the exchange record data holding means 112 of the recording means 110. Is done.

  Further, a terminal operation of the operator 1 through a call or facsimile communication with the client 2 is recorded as terminal record data 15 by the terminal operation recording unit 113 of the recording unit 110.

  The digital recording data 16 composed of the digital audio recording 13 recorded in this way and the exchange recording data 14 and the terminal recording data 15 related thereto is converted into a one-way function value 16A by the time stamp obtaining means 123 of the application server 120. Is passed to the time stamp server 130. Here, the one-way function value 16A is also called, for example, a hash (HASH) value or a message digest, and is, for example, a fixed-length pseudo-random number generated by an irreversible one-way function such as a hash function. Although the same one-way function value is obtained from the same data, the original data cannot be reproduced from the one-way function value. Then, the time stamp server 130 receives the one-way function value 16A of the digital recording data 16 from the time stamp obtaining means 123, and creates a digital certificate 17 in which time stamp information is added to this. Although details of the digital certificate 17 will be described later, it is preferable that the digital certificate 17 be encrypted and signed by a predetermined procedure.

  In addition, the time stamp obtaining unit 123 obtains the digital certificate 17 issued from the time stamp server 130 in association with the digital voice record 13, the exchange record data 14, and the terminal record data 15, and stores the digital certificate 17 in the storage server 140.

  That is, the storage server 140 of the date and time fixed voice recording center 100 stores the digital recorded data 16 including the digital voice recording 13 and the exchange recording data 14 and the terminal recording data 15 related thereto, and the digital recording data 16 related to the digital recording data 16. The certificate 17 and the date and time are recorded in a database as a fixed date and time voice record 18. The date and time fixed voice record 18 and the digital voice record 13 related to the date and time are stored in a database from a search terminal (not shown) connected to the date and time fixed voice recording center 100, for example, an incoming time, an end time, and an extension number. The data can be easily retrieved from various types of data such as the exchange record data 14 such as the caller number, the call start time and the call end time, and the terminal record data 15.

  Here, the time notarization center 200 that performs the time calibration of the time stamp server 130 includes a time calibration unit 201. The time calibration unit 201 includes, for example, a master clock 203 and a master clock to which a time source is supplied from a cesium atomic clock 202. The system includes a time distribution server 204 that distributes time from the clock 203. The time distribution server 204 periodically calibrates a clock that is built in the time stamp server 130 and that outputs time information. Here, it is assumed that the master clock 203 and the time distribution server 204 are separately or directly audited from Coordinated Universal Time or Japan Standard Time.

  The time notarization center 200 periodically accesses the time stamp server 130 to calibrate the built-in clock, and also a unique ID 20 of the time stamp server 130 and a public key certificate of a public key used by the time stamp server 130. 22 and issues a time calibration certificate including a hash value that is a one-way function value of the public key certificate.

  Here, an example of the time stamp server 130 and an example of a digital certificate issued by the time stamp server 130 will be described in more detail with reference to FIG. FIG. 4 is a diagram illustrating a time stamp server and a digital certificate according to the first embodiment of the present invention.

  As shown in FIG. 4, the time stamp server 130 has a unique ID 20 managed by the time notary center 200, incorporates a clock 131, and includes a digital certificate creation unit 132. Further, the digital certificate 17 includes a secret key 21 used for encryption when creating the digital certificate 17 and a public key certificate 22 of a public key paired with the secret key 21. As described above, the clock 131 of the time stamp server 130 is periodically calibrated at a predetermined timing by the time calibrating unit 201 of the time notary center 200, and receives the time calibration certificate 30 at the time of this calibration. I keep this.

  The digital certificate creating means 132 creates time stamp information 23 obtained by adding the time information acquired from the clock 131 to the one-way function value 16A acquired from the time stamp acquiring means 123, and uses the time stamp information 23 as the secret key 21 A digital signature 24 that is encrypted and signed is created and output as a digital certificate 17. Therefore, the digital certificate 17 includes the time stamp information 23 and the electronic signature 24, and further includes the public key certificate 22 of the time stamp private key and the time calibration certificate 30. It should be noted that the digital certificate 17 is not limited to this, and it is sufficient that the digital certificate 17 includes at least the time stamp information 23 and the electronic signature 24.

  As described above, the time signal 11 is embedded in the call voice record 10 or the facsimile data which is the analog data before the digital conversion into the digital voice record 13, and the digital certificate of the digital voice record 13, the exchange record data 14, and the terminal record data 15 are obtained. By issuing the certificate 17 from the time stamp server 130 certified by the time notary center 200, which is a third party organization, it becomes impossible to falsify the time information of the digital recording data 16 and the digital audio recording 13 and to obtain the notarized information. Since the recorded time is retained, the digital record data 16 can be made objective and impartial notary data.

  FIG. 5 is a diagram illustrating an outline of a date and time fixed voice recording system according to the second embodiment of the present invention. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 5, the date and time fixed voice recording system includes a telephone exchange 50 provided in a company serving as a user and a date and time fixed voice recording center 100A, and a third date and time independent of the user. A time notary center 200 is provided in the third party organization, and a content notary center 135 having a time stamp server 130A is provided in a third party organization independent of the time notary center 200.

  The date and time confirmed voice recording center 100A includes a recording unit 110, an application server 120, and a storage server 140.

  The content notary center 135 is a third party independent of the user having the date and time confirmed voice recording center 100A, and includes a time stamp server 130A. The time stamp server 130A also obtains the one-way function value 16A from the application server 120 similarly to the time stamp server 130 provided adjacent to the date and time confirmed voice recording center 100 according to the first embodiment, and obtains the digital certificate. 17 is issued.

  Further, the time notarization center 200 is provided in a third party organization independent of each of the date and time confirmation voice recording center 100A and the content notarization center 135, as in the first embodiment.

  The time notary center 200 also periodically calibrates a clock that is built in the time stamp server 130A and outputs time information, as in the first embodiment.

  The date and time confirmation voice recording center 100A and the contents notary center 135 are connected to each other via a network such as the Internet or a dedicated line, and both the time stamp server 130A and the time notary center 200 are connected to a network such as the Internet and a dedicated line. Connected to each other.

  As described above, the time stamp server 130A is issued by the time stamp server 130A by providing the time stamp server 130A at the content notarization center 135, which is a third party independent of the company serving as the user, and connecting them via a network. The digital certificate 17 that can be a notary public with further enhanced objectivity of the digital certificate 17 can be provided.

  FIG. 6 is a diagram showing an outline of a date and time fixed voice data authentication system according to Embodiment 3 of the present invention. The same components as those in the first and second embodiments are denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 6, the date and time fixed voice data authentication system includes a telephone exchange 50 and a date and time fixed voice recording center 100A provided in a company serving as a user, and a third and independent date and time fixed voice recording center 100A. A time stamp server 130A provided in the content notary center 135 which is a third party organization, and a time notary center 200A provided in a third party organization which is independent of the date and time fixed voice recording center 100A and the content notary center 135, respectively. In addition, a date verification voice recording center 100A, a content notary center 135, and a time notary center 200A are each provided with a content verification center 300 provided in a third party independent of each other.

  The date and time confirmed voice recording center 100A includes a recording unit 110, an application server 120, and a storage server 140, as in the second embodiment.

  Further, the time notarization center 200A includes a time calibration unit 201, a management unit 210, and a time verification unit 211.

  In the notarization center 200A, the management unit 210 acquires the unique ID 20 and the public key certificate 22 of the time stamp server 130A at the time of time calibration by the time calibration unit 201, and issues the time calibration certificate 30 to the time stamp server 130A. Therefore, with the time calibration certificate 30 included in the digital certificate 17 issued by the time stamp server 130A, the time verification unit 211 monitors whether the time stamp server 130A has generated an appropriate digital certificate 17, Can be verified.

  In addition, the time notary center 200A periodically calibrates a clock that is built in the time stamp server 130A and outputs time information.

  On the other hand, the content verification center 300 acquires the one-way function value 16A of the digital record data 16 used for creating the digital certificate 17, stores it, and verifies the validity of the content of the digital certificate 17 with the verification unit 301. Have.

  The verification unit 301 receives the digital certificate 17 issued by the time stamp server 130A, verifies the digital certificate 17, and issues the result as a verification certificate or the like.

  Here, the time notary center 200A and the content verification center 300 will be described with reference to FIG. FIG. 7 is a diagram showing details of the time notary center and the content verification center.

  As shown in FIG. 7, the time notary center 200A or the content verification center 300 provides the digital certificate 17 and the necessary information from the user using the date and time fixed voice recording center 100A or a third party such as the client 1 or a court. , Data of the digital audio recording 13 or the like is transmitted.

  The time verification unit 211 of the time notarization center 200A converts the time calibration certificate 30 and the time stamp information 23 included in the received digital certificate 17 and the unique ID 20 and the public key certificate 22 stored in the management unit 210 into a digital form. It verifies whether the time calibration certificate 30 and the time stamp information 23 of the certificate 17 have not been tampered with. The verification result is issued as a time verification certificate 40 to the sender of the digital certificate 17. Thereby, the notarity of the time stamp information 23 of the digital certificate 17 can be improved.

  On the other hand, the verification unit 301 of the content verification center 300 determines the one-way function value 16A included in the time stamp information 23 of the received digital certificate 17 and the one-way function value of the digital record data 16 used to create the digital certificate 17. By comparing the function value 16 </ b> A with the function value 16 </ b> A, more accurate verification such as falsification of the received digital certificate 17 is performed. Further, by comparing and verifying the one-way function value 16A stored in the content verification center 300 and data such as the digital voice recording 13 stored in the date and time confirmed voice recording center 100A, the digital data stored in the storage server 140 is verified. It verifies that the voice record 13 and the like have not been tampered with, and proves this. Such a verification result is issued as a verification certificate 41 to the sender of the digital certificate 17. Thereby, the notarization of the digital certificate 17 and the digital audio recording 13 can be improved.

  In order to verify the falsification of the digital voice record 13 stored in the date and time fixed voice recording center 100A, for example, the digital voice record 13 stored in the recording unit 110, the exchange record data 14 and the terminal record The digital recording data including the data 15 is obtained again, a new one-way function value is generated from the obtained digital recording data, and the generated one-way function value and the digital certificate 17 stored in the content verification center 300 are stored. This can be performed by comparing the one-way function value 16A used for the creation. The verification of the digital audio recording 13 can also be performed by confirming the disturbance of the time signal 11 embedded in the digital audio recording 13.

  As described above, in the present embodiment, the time notary center 200A provided in the third party independent of the date and time fixed voice recording center 100A and the content notary center 135 monitors the digital certificate 17 generated by the time stamp server 130A. In addition, the objectivity can be improved for verification. In addition, the validity of the digital certificate 17 is verified by the content verification center 300 provided in a third party independent of each of the date and time confirmed voice recording center 100A, the content notary center 135, and the time notary center 200A. Further, the notarity of the digital record data 16 and the digital certificate 17 can be proved with enhanced objectivity.

  The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments.

  For example, in the above-described first to third embodiments, the digital certificate 17 is stored in a database together with the digital record data 16. In addition, the time stamp information 23 included in the digital certificate 17 is stored in the client 1. You may tell to. Thereby, the client 1 can grasp the storage status of the call voice transmitted to the operator 2. The notification of the time stamp information 23 to the client 1 can be performed by e-mail or the like.

  Further, for example, in the above-described first to third embodiments, the call voice record 10 and the facsimile data in which the client 1 and the operator 2 talk via the telephone exchange 50 connected to the public telephone network are recorded. However, the present invention is not particularly limited to this. For example, it is also possible to increase both the call voice recording and the facsimile data to improve the accuracy of transaction recording. You may. In this case as well, by using the date and time fixed voice recording system or the date and time fixed voice recording data authentication system of the first to third embodiments described above between the client 1 and the automatic voice guidance, the same as in the first to third embodiments described above. The effect of can be obtained.

  Further, in the above-described first to third embodiments, the time signal 11 of the clock 121 built in the application server 120 is embedded in the call voice recording 10, but the time signal 11 of the clock 121 is obtained from the time stamp server 130. You may make it.

FIG. 1 is a diagram illustrating an outline of a date and time fixed voice recording system according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating an outline of date and time fixed voice recording according to the first embodiment of the present invention. It is a figure which shows typically the time signal embedded call | voice audio | voice recording based on Embodiment 1 of this invention. FIG. 2 is a diagram illustrating a time stamp server and a digital certificate according to the first embodiment of the present invention. It is a figure showing the outline of the date and time fixed sound recording system concerning Embodiment 2 of the present invention. It is a figure showing the outline of the date and time fixed voice data authentication system concerning Embodiment 3 of the present invention. It is a figure showing details of a time notary center and a contents verification center concerning Embodiment 3 of the present invention.

Explanation of reference numerals

Reference Signs List 1 client 2 operator 10 call voice record 11 time signal 12 time embedded call voice record 13 digital voice record 14 exchange record data 15 terminal record data 50 telephone exchange 100, 100A date and time fixed voice record center 110 recording means 111 digital voice record 112 exchange Recorded data holding means 113 Terminal operation recording means 120 Application server 121 Clock 122 Time signal embedding means 123 Time stamp acquisition means 130, 130A Time stamp server 135 Content notary center 200, 200A Time notary center 300 Content verification center

Claims (15)

A voice digital recording device for converting a voice voice recording and / or facsimile data of a telephone connected to a public telephone network via a telephone exchange into a digital voice record and recording the data as a one-way function value of electronic data. A date and time fixed voice recording system that saves a date and time fixed voice record by sending the digital voice record to a time stamp server that issues a digital certificate digitally signed by adding time information to the information and acquires the digital certificate So,
A time signal embedding unit for embedding a time signal obtained from the time stamp server into the call voice record and / or the facsimile data before the digital conversion by the voice digital recording device at a constant interval to make a time signal embedded call voice record; While the audio signal digital recording device is provided with the time signal embedded call voice record is digitally converted and recorded as a digital voice record,
Exchange record data holding means for recording exchange record data relating to the call voice record and / or the facsimile data held by the telephone exchange in association with the digital voice record, and used by an operator who is talking via the telephone Terminal operation recording means for recording operation record data of a computer terminal to be associated with the digital voice record, and acquiring the digital voice record and obtaining the exchange record data and the operation record data related to the digital voice record And a time stamp obtaining means for transmitting the one-way function value of all the data to the time stamp server to obtain and store the digital certificate. .   2. The date-determined voice recording system according to claim 1, wherein said time stamp obtaining means obtains a one-way function value of said digital voice recording from said voice digital recording device.   3. The date-determined voice recording system according to claim 1, wherein the time stamp server is mounted at a place separated from the voice digital recording device, and both are connected via a network. Confirmed voice recording system.   3. The date-fixed voice recording system according to claim 1, wherein the time stamp server is placed at a location adjacent to the digital voice recording device, but is managed by a third party independent of the user. 4. A date and time fixed voice recording system characterized by the following.   5. The date notifying voice recording system according to claim 1, wherein the time information of the time stamp server includes a reference time means for marking a reliable reference time which is calibrated based on Coordinated Universal Time. A date and time fixed voice recording system that is periodically calibrated by the center.   6. The date fixed voice recording system according to claim 5, wherein the time notarization center accesses the time stamp server via a network to obtain the ID and specific information of the time stamp server. Recording system.   7. The date confirmation voice recording system according to claim 5, wherein the time notary center transmits a time calibration certificate to the time stamp server when performing time calibration, and the time stamp server transmits the time calibration certificate. The digital certificate is issued including the following.   8. The date-determined voice recording system according to claim 6, wherein the specific information is a public key certificate of a public key paired with a secret key used by the time stamp server. system. While a user uses a voice digital recording device that converts a call voice record and / or facsimile data of a telephone connected to a public telephone network via a telephone exchange into a digital voice record, the user uses one-way electronic data. A content notary center having a time stamp server for issuing a digital certificate digitally signed by adding time information to electronic information consisting of function values, a time notary center for calibrating the time information of the time stamp server, Set up a content verification center to verify the validity of certificates, and connect them to each other via a network.
A time signal embedding unit for embedding a time signal obtained from the time stamp server into the call voice record and / or the facsimile data before the digital conversion by the voice digital recording device at a constant interval to make a time signal embedding call voice record; While the audio signal digital recording device is provided with the time signal embedded call voice record is digitally converted and recorded as a digital voice record,
Exchange record data holding means for recording exchange record data relating to the call voice record and / or the facsimile data held by the telephone exchange in association with the digital voice record, and used by an operator who is talking via the telephone Terminal operation recording means for recording operation record data of a computer terminal to be associated with the digital audio record, and acquiring the digital audio record and exchanging the exchange record data and the operation record data relating to the digital audio record And obtaining a digital certificate by sending a one-way function value of all of these data to the time stamp server to acquire and store the digital certificate,
The time notarization center is a pair of a time calibration unit that ticks a reliable reference time that is calibrated based on Coordinated Universal Time and performs time calibration of the time stamp server, and a secret key uniquely used by the time stamp server. Management means for storing information of a public key to be formed or information for specifying the public key, and specifying information included in the digital certificate together with the ID of the time stamp server,
The date verification voice data authentication system, wherein the content verification center includes verification means for verifying the validity of the digital certificate.   10. The date and time confirmed sound data authentication system according to claim 9, wherein said time stamp acquiring means acquires a one-way function value of said digital sound recording from said sound digital recording device.   11. The date verification sound data authentication system according to claim 9, wherein the time notary center receives a verification request based on the digital certificate and performs time verification based on information accumulated by the management unit. A date-and-time-determined voice data authentication system comprising:   12. The date confirmation sound data authentication system according to claim 9, wherein the verification unit performs verification using data used for creating the digital certificate such as the digital voice record together with the digital certificate. A date and time confirmed voice data authentication system characterized by the following.   13. The date confirmation sound data authentication system according to claim 12, wherein the verification unit previously acquires and stores the same data as the one-way function value sent to the time stamp server from the time stamp unit. A date and time fixed voice data authentication system, characterized in that:   14. The date confirmation sound data authentication system according to claim 9, wherein the time stamp server is mounted close to the user's voice digital recording device, and is managed by the content notary center. Date and time confirmed voice data authentication system.   15. The date and time confirmation voice data authentication system according to claim 9, wherein the content notarization center and the content verification center are integrally provided.

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