KR101585121B1 - Sound recording certification system and sound recording certification method - Google Patents

Sound recording certification system and sound recording certification method Download PDF

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Publication number
KR101585121B1
KR101585121B1 KR1020150113276A KR20150113276A KR101585121B1 KR 101585121 B1 KR101585121 B1 KR 101585121B1 KR 1020150113276 A KR1020150113276 A KR 1020150113276A KR 20150113276 A KR20150113276 A KR 20150113276A KR 101585121 B1 KR101585121 B1 KR 101585121B1
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South Korea
Prior art keywords
recording
terminal
sound signal
time
signal
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KR1020150113276A
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Korean (ko)
Inventor
양일호
소병민
김명재
허희수
유하진
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대한민국
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • H04L9/3228—One-time or temporary data, i.e. information which is sent for every authentication or authorization, e.g. one-time-password, one-time-token or one-time-key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • H04L9/3231—Biological data, e.g. fingerprint, voice or retina

Abstract

The present invention relates to a recording authorization system and a recording authorization method using the same. According to the present invention, the recording authorization method, which uses the recording authorization system including a sound signal generation terminal and a recording authorization server, includes: a step in which the recording authorization server generates a one-time code after receiving a code request signal from the sound signal generation terminal and transmits the one-time code to the sound signal generation terminal; and a step in which the sound signal generation terminal generates a sound signal varying according to time in a pattern corresponding to the one-time code and outputs the sound signal through a speaker. The recording authorization method can be used to mix and record the sound signal in an audio file currently being recorded in a recording terminal adjacent to the sound signal generation terminal on a real-time basis. The present invention can easily capture the motivation and intent of file forgery by recognizing detailed sections actually being edited as well as easily determining the authenticity of the recorded audio file and whether the recorded audio file is edited, thereby being effectively utilized to analyze the audio data submitted to court.

Description

[0001] The present invention relates to a recording authentication system and a recording authentication method using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording authentication system and a recording authentication method using the recording authentication system, and more particularly, to a recording authentication system for determining whether an audio file is edited and a recording authentication method using the same.

Recently, as the spread of mobile devices such as smart phones is activated, there are more and more cases of recording audio files and acquiring them as proof data by executing a recording function easily during a call or during a conference using a mobile device.

In addition, audio editing software is now commonplace, making it easier for ordinary people without expertise to edit audio files. As a result, more and more audio files are being submitted as court evidence, and it is increasingly necessary to determine whether or not the submitted audio file is edited.

There are two general situations in which it is necessary to determine whether an audio file is edited. One is the case where an already edited (falsified) audio file has been submitted as evidence and a good victim has occurred, and the other is that an unedited audio file has been submitted as evidence, but the suspect has been manipulated It is a case to assert.

1 is a diagram showing a case where an already edited audio file is submitted as a court evidence. Actually, the original audio file is recorded as "I did not receive that money" as the audio information of person A. However, Person B has deleted some voice segments and submitted an audio file edited as "I received that money" as court evidence, and Person B is a false witness in a court based on manipulated evidence.

2 is a diagram showing a case where an unedited audio file is submitted as a court evidence. Actually, the original audio file is recorded in the voice information of the person A as "I received that money". Person B submits this original audio file as court evidence as it is, but person A in the court is falsely testifying that the evidence has been tampered with.

In both of these cases, it is necessary to check whether the audio file is edited. Therefore, if the original audio file is artificially edited, it is necessary to ensure that the digital victim is not caused by the digital forgery file by proving that it has no value or effect as an evidence.

BACKGROUND ART [0002] The technology of the present invention is disclosed in Korean Patent No. 0534056 (published on Dec. 12, 2005).

An object of the present invention is to provide a recording authentication system capable of easily discriminating the authenticity of a recorded audio file and a recording authentication method using the recording authentication system.

The present invention provides a recording authentication method using a recording authentication system including a sound signal generating terminal and a recording authentication server, wherein the recording authentication server generates a one-time code upon receiving a code request signal from the sound signal generating terminal, And generating a sound signal varying with time in a pattern corresponding to the one-time code and outputting the sound signal through a speaker, wherein the sound signal generating terminal comprises: There is provided a recording authentication method in which the sound signal is mixed and recorded on an audio file currently being recorded on a recording terminal in real time.

Here, the sound signal generating terminal may transmit the code request signal when receiving an external command signal.

In addition, the sound signal generating terminal may output the sound signal filtered in an audible frequency band.

According to another aspect of the present invention, there is provided a recording authentication method using a recording authentication system including a recording terminal and a recording authentication server, the recording authentication server generating a one-time code upon receiving a code request signal from the recording terminal, And the recording terminal generates a sound signal varying with time in a pattern corresponding to the one-time code, and mixing the recorded audio file on the currently recorded audio file in real time.

Here, the recording terminal can transmit the code request signal when receiving a recording start signal from a user.

In addition, the recording terminal corresponds to a user terminal equipped with a recording authentication mobile app provided by the recording authentication server, and can transmit the code request signal when the recording start signal is received while the mobile app is running.

In addition, the recording authentication server may compare the transmitted one-time code and the audio signal extracted from the audio file to determine whether the audio file is edited.

Also, the recording authentication server may receive at least one of the date and time of occurrence of the sound signal, the time of occurrence, the position information at the time of occurrence, and the ID of the terminal that generated the sound signal, and may store the information by mapping the time code to the one- .

The recording authentication server generates a one-time code when receiving the code request signal from the sound signal generating terminal, and transmits the one-time code to the sound signal generating terminal. The sound signal generating terminal generates a sound signal varying with time in a pattern corresponding to the one-time code, outputs the sound signal through a speaker, and outputs the sound signal to the recording terminal in real time And a recording authentication system in which mixed recording is performed.

The present invention is a recording authentication system including a recording terminal and a recording authentication server, wherein the recording authentication server generates a one-time code upon receiving a code request signal from the recording terminal and transmits the code to the recording terminal, The recording terminal generates a sound signal varying with time in a pattern corresponding to the one-time code, and provides a recording authentication system for real-time mixing on an audio file currently being recorded.

According to the recording authentication system and the recording authentication method using the recording authentication system according to the present invention, not only whether the recorded audio file is edited and the authenticity can be easily discriminated, but also the detailed section in which the edited audio file is actually edited can be grasped, It has the advantage of being able to easily capture the intention and to be effectively used for the analysis of the audio data submitted to the court.

1 is a diagram showing a case where an already edited audio file is submitted as a court evidence.
2 is a diagram showing a case where an unedited audio file is submitted as a court evidence.
3 is a diagram illustrating a recording authentication system according to a first embodiment of the present invention.
4 is a diagram for explaining a recording authentication method using the recording authentication system shown in FIG.
5 is a diagram illustrating a recording authentication system according to the first embodiment of the present invention.
FIG. 6 is a diagram for explaining a recording authentication method using the recording authentication system shown in FIG.
FIG. 7 is a diagram illustrating a scenario in which a recording authentication system according to the present invention is reversed through re-recording.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention relates to a recording authentication system and a recording authentication method using it, and proposes a server-client type system in which an authenticity of an audio file can be easily discriminated. In the embodiment of the present invention, the server is assumed to be operated by a public institution or a comparable firm.

The present invention consists of two types of subsystems according to the function of the client. Hereinafter, the two types of systems will be described in detail as separate embodiments.

3 is a diagram illustrating a recording authentication system according to a first embodiment of the present invention. Referring to FIG. 3, the recording authentication system according to the first embodiment of the present invention includes a recording authentication server 100, a sound signal generating terminal 200, and a recording terminal 300.

The recording authentication server 100 generates a one-time code corresponding to the request of the code signal from the sound signal generating terminal 200 corresponding to the client, and responds to the sound signal generating terminal 200.

Here, the one-time code corresponds to an element for determining a generation pattern of a sound signal to be output from the sound signal generating terminal 200, and is randomly generated by the recording authentication server 100 when a code request is made. The recording authentication server 100 separately stores and stores the one-time code transmitted to the sound signal generating terminal 200.

The sound signal generating terminal 200 generates an acoustic signal corresponding to the one-time code received from the recording authentication server 100, that is, a sound signal having a variable pattern according to time, and outputs the sound signal through the speaker in real time. Here, the sound signal generating terminal 200 can transmit a code request signal when receiving a command signal from the outside via a separate button or a command input unit. For example, when the user operates a code request key or a button, And may transmit a code request signal by wirelessly receiving a command signal from a recording terminal 300 forming a wireless pair with the sound signal generating terminal 200. [

The acoustic signal generating terminal 200 may include an audio reproducing software programmed with an algorithm or an algorithm for analyzing a received one-time code and reproducing an acoustic signal varying in a pattern corresponding to the analyzed one-time code. Of course, such an algorithm or rule corresponds to the information that is already managed and stored in the recording authentication server 100 as well.

In addition, the sound signal generating terminal 200 can be installed in a fixed place such as an office or a conference room, and can generate a fine acoustic signal in the surroundings. To this end, the sound signal generating terminal 200 outputs a sound signal filtered to a human audible frequency band. For example, it outputs an acoustic signal to the extent that it can be heard finely, such as a ventilation fan operation sound, a daily noise sound,

Of course, the embodiment of the present invention is not necessarily limited to this, and the acoustic signal generating terminal 200 may generate an acoustic signal of an inaudible frequency band which is not recognized by a person. In this case, the recording terminal 300 may be configured to recognize not only the audio frequency band but also the sound of the non-audible frequency band.

When a recording terminal 300 having a built-in recording function such as a sound recorder or a smart phone performs voice recording in a conference room in which the acoustic signal generating terminal 200 is installed, The acoustic signals are mixed and recorded in real time. Therefore, the original audio file recorded in the recording terminal 300 has a form in which a sound signal varying with time is mixed with a real audio signal.

Here, if editing (deletion or insertion of a specific section) is performed on an audio file by a malicious user in the future, the edited sound signal of the corresponding section is damaged. Accordingly, if the audio signal in the audio file is compared with the information stored in the recording authentication server 100, it is possible to easily determine whether the audio file is authentic, edited or not.

4 is a diagram for explaining a recording authentication method using the recording authentication system shown in FIG. Hereinafter, a recording authentication method according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG.

First, the acoustic signal generating terminal 200 installed in a target space such as a conference room transmits a code request signal to the recording authentication server 100 (S410). Here, the sound signal generating terminal 200 can transmit a code request signal based on a command received from the outside. Also, when transmitting the code request signal, the terminal ID is transmitted together to identify the device.

Upon receiving the code request signal, the recording authentication server 100 generates a one-time code and transmits it to the corresponding sound signal generating terminal 200 (S420).

Then, the sound signal generating terminal 200 generates an acoustic signal varying with time in a pattern corresponding to the one-time code, and outputs the generated acoustic signal through the speaker (S430). At this time, the output sound signal is mixed and recorded on the audio file currently being recorded in the recording terminal 300 in the object space in operation S440. Therefore, in this case, the original audio file is recorded not only in the audio signal but also in a state in which the audio signal for editing being output is varied in real time and mixed in real time.

When the audio file to be authenticated is received, the recording authentication server 100 can determine whether the audio file is edited by comparing the audio signal extracted from the audio file with the previously transmitted one-time code have.

Here, in this embodiment, since acoustic signals of a pattern varying with time in accordance with a one-time code are recorded together with a voice signal, if a specific section of the voice signal is edited, the acoustic signal of the corresponding section is also edited, It is easy to check whether the edit is made or the edit information is made. In addition, since the edited section information can be specifically confirmed from the entire recorded data, the specific motive and intention of the file forgery can be captured easily.

On the other hand, despite this effort, a malicious user previously edits (forgery) a separate audio file in which only a voice signal is recorded at a different time and location unrelated to the target space, and then the edited audio file May be re-recorded together with the acoustic signal while being simply reproduced without the other party in the object space as described above. This may be the case of exploiting the system of the present invention to decorate the forged audio file as if it were a ghost.

In the case where the audio signal is mixed with the already-falsified audio file in this way, no damage is caused to the audio signal. If the speaker of the audio signal can prove alibi at the point of falsification of the sound, It can not be proved to be a counterfeit file, so it will be damaged.

In order to prevent such a problem, the embodiment of the present invention includes a step of additionally receiving additional information from the sound signal generating terminal 200 as in step S450 of FIG.

That is, the recording authentication server 100 determines whether at least one of the generation date of the sound signal, the generation time, the position information at the time of occurrence, and the ID of the terminal 200 that generated the sound signal, Information as additional information (S450), and maps the received additional information to the one-time code (S460). Here, the additional information may further include radio signals (AM and FM information) received by the terminal in response to the time of occurrence, in addition to those described above.

In this manner, the recording authentication server 100 maps and stores the collected additional information for each one-time code. According to this, it is possible to grasp the specific situation (ex, time, place, etc.) in which the recording is made on the system of the present invention, and if the speaker proves that the place has not been visited, the malicious user can obtain an alibi It becomes difficult to do.

5 is a diagram illustrating a recording authentication system according to a second embodiment of the present invention. Referring to FIG. 5, the recording authentication system according to the second embodiment of the present invention includes a recording authentication server 400 and a recording terminal 500.

In the second embodiment of the present invention, the recording authentication server 400 carries out the same functions as those of the first embodiment described above and operates on the same principle, so a detailed description thereof will be omitted. However, in the second embodiment of the present invention, the recording terminal 500 corresponds to a direct client and has a function of covering the sound signal generating terminal and the recording terminal described in the first embodiment.

In the case of the second embodiment, unlike the first embodiment, since the means of the sound signal generating terminal is not required, the recording terminal 500 does not necessarily have to be located at a designated place such as a conference room or the like. The recording terminal 500 may correspond to the recording authentication server 400 and a general recording device, or may correspond to a mobile user terminal such as a smart phone.

The recording terminal 500 can perform direct wired communication with the recording authentication server 400 and transmits a code request signal to the recording authentication server 400. The recording terminal 500 receives the one-time code from the recording authentication server 400 in response thereto. Here, the recording terminal 500 can transmit a code request signal when receiving a recording start signal from a user through a separate button, a keypad, a touch pad, or the like.

In addition, when the recording terminal 500 corresponds to a general user terminal such as a smart phone, the recording terminal 500 may be provided with a recording authentication mobile app provided by the recording authentication server 400. [ In this case, the recording terminal 500 may be configured to automatically transmit a code request signal when a recording start signal is received in the application in a state where the mobile app is executed. Of course, the recording function may be activated immediately upon inputting the recording start signal to the recording terminal 500, or the recording function may be activated after the one-time code is received.

When the recording terminal 500 receives the one-time code from the recording authentication server 400, the recording terminal 500 generates a sound signal that varies with time in a pattern corresponding to the one-time code, real- do.

At this time, it is possible to implement such that the corresponding sound signal is not transmitted through the speaker of the recording terminal 500 at all, or the sound signal filtered in the audio frequency band may be transmitted as in the first embodiment. In case of the former, the sound signal generated internally by the recording terminal 500 may be implemented by a method of digitally mixing the sound signal actually recorded with the sound signal not outputted outside. Of course, in the case of the second embodiment, since the recording terminal 500 itself includes a function of generating a sound signal, it is not necessarily required to transmit the sound signal through the speaker regardless of whether it is an audio frequency band or not.

FIG. 6 is a diagram for explaining a recording authentication method using the recording authentication system shown in FIG. Hereinafter, a recording authentication method according to a second embodiment of the present invention will be described with reference to FIG. 5 and FIG.

First, the recording terminal 500 transmits a code request signal to the recording authentication server 400 (S610). Here, the recording terminal 500 can transmit a code request signal based on a command (ex, recording start signal) received from the outside as described above. When transmitting the code request signal, the terminal ID is transmitted together for device identification.

The recording authentication server 400 receiving the transmitted code request signal generates a one-time code and transmits it to the recording terminal 500 (S620).

Then, the recording terminal 500 generates a sound signal varying with time in a pattern corresponding to the one-time code, and mixes the recorded audio file on the currently recorded audio file in real time (S630). In this case, the original audio file is recorded not only in the audio audio signal but also in real-time mixed audio signals for editing which are generated by varying with time.

When the audio file to be authenticated is received, the recording authentication server 400 may compare the audio signal extracted from the audio file with the previously transmitted one-time code to determine whether the audio file is edited have.

In the case of the second embodiment, as a method for preventing damage caused by re-recording a file already falsified through the system of the present invention as in the first embodiment, In response to a request from the user.

That is, the recording authentication server 400 may transmit at least one of the date and time of occurrence of the sound signal, the position information at the time of occurrence, and the ID of the terminal 500 that generated the sound signal during or after the process of step S630 (S640), and stores it as a one-time code (S650). Here, the additional information may further include radio signals (AM and FM information) received by the terminal 500 in response to the time of occurrence.

7 is a diagram illustrating a scenario in which a recording authentication system according to the present invention is reversed through re-recording by a malicious user. FIG. 7 shows a case where an audio file edited by forgery of a voice recording file in advance is recorded while being reproduced in the vicinity of the recorder, before using the system of the present invention. In this case, since the audio signal is mixed with the already-edited audio file, the audio signal is not damaged at all. However, when the additional information as described above is compared with the behavior and alibi of the users, it is proved that the file is already abused .

An exemplary use case of a recording prevention system according to an embodiment of the present invention is as follows. The editing-prohibited acoustic signal generating terminal according to the embodiment of the present invention is installed in a conference room or a private office of a public institution, a company, or the like, and makes it difficult for someone to record a conversation at the place and edit it for malicious purposes. In addition, since the edited voice recording terminal according to the second embodiment of the present invention can easily grasp the authenticity of a recorded audio file, it is possible to easily obtain an audio file having a high statutory evidence capability by a media worker, an investigator, I can do it.

According to the recording authentication system and the recording authentication method using the same according to the present invention as described above, not only whether the recorded audio file is edited and authenticity can be easily discriminated, but also the detailed section in which the edited audio file is actually edited can be grasped, It can easily capture specific motives and intentions, and has the advantage of being effectively utilized in the analysis of audited audio data.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100, 400: recording authentication server 200: sound signal generating terminal
300,500: Recording terminal

Claims (16)

A recording authentication method using a recording authentication system including a sound signal generating terminal and a recording authentication server,
Receiving the code request signal from the sound signal generating terminal and transmitting the generated one-time code to the sound signal generating terminal; And
Wherein the sound signal generating terminal generates an acoustic signal varying with time in a pattern corresponding to the one-time code and outputting the generated acoustic signal through a speaker,
The acoustic signals are mixed and recorded on an audio file currently being recorded on the recording terminal in real time,
The recording authentication server includes:
And comparing the transmitted one-time code and the audio signal extracted from the audio file to determine whether the audio file is edited. The method according to claim 1,
The sound signal generating terminal includes:
And transmitting the code request signal when receiving a command signal from the outside. The method according to claim 1,
The sound signal generating terminal includes:
And outputting the acoustic signal filtered in an audible frequency band. A recording authentication method using a recording authentication system including a recording terminal and a recording authentication server,
Receiving the code request signal from the recording terminal, generating the one-time code and transmitting the one-time code to the recording terminal; And
Wherein the recording terminal includes a step of generating a sound signal varying with time in a pattern corresponding to the one-time code and mixing the audio signal on the currently recorded audio file in real time,
The recording authentication server includes:
And comparing the transmitted one-time code and the audio signal extracted from the audio file to determine whether the audio file is edited. The method of claim 4,
Wherein the recording terminal transmits the code request signal when receiving a recording start signal from a user. The method of claim 5,
Wherein the recording terminal corresponds to a user terminal equipped with a recording authentication mobile app provided by the recording authentication server and transmits the code request signal when receiving the recording start signal in a state in which the mobile app is running. delete The method according to claim 1 or 4,
The recording authentication server includes:
Receiving at least one of a date of occurrence of the sound signal, a time of occurrence of the sound signal, position information of the sound signal at the time of occurrence, and an ID of a terminal that generates the sound signal, and mapping the received information to the one-time code. A recording authentication system including a sound signal generating terminal and a recording authentication server,
The recording authentication server includes:
Upon receipt of the code request signal from the sound signal generating terminal, generates a one-time code and transmits it to the sound signal generating terminal,
The sound signal generating terminal includes:
Generates a sound signal varying with time in a pattern corresponding to the one-time code, and outputs the generated sound signal through a speaker,
The acoustic signal is mixed and recorded on the audio file currently being recorded on the recording terminal in the vicinity of the sound signal generating terminal in real time,
The recording authentication server includes:
And comparing the transmitted one-time code and the audio signal extracted from the audio file to determine whether the audio file is edited. The method of claim 9,
The sound signal generating terminal includes:
And transmits the code request signal when receiving a command signal from the outside. The method of claim 9,
The sound signal generating terminal includes:
And outputting the acoustic signal filtered in an audible frequency band. A recording authentication system including a recording terminal and a recording authentication server,
The recording authentication server includes:
Upon receiving a code request signal from the recording terminal, generates a one-time code and transmits the code to the recording terminal,
The recording terminal,
Generating a sound signal varying with time in a pattern corresponding to the one-time code, real-time mixing and recording on an audio file currently being recorded,
The recording authentication server includes:
And comparing the transmitted one-time code and the audio signal extracted from the audio file to determine whether the audio file is edited. The method of claim 12,
Wherein the recording terminal transmits the code request signal when receiving a recording start signal from a user. 14. The method of claim 13,
Wherein the recording terminal corresponds to a user terminal equipped with a recording authentication mobile app provided by the recording authentication server and transmits the code request signal when receiving the recording start signal in a state in which the mobile app is executed. delete The method according to claim 9 or 12,
The recording authentication server includes:
Wherein the at least one information is at least one of an occurrence date and time of the sound signal, a time at which the sound signal is generated, position information at the time of the occurrence, and an ID of a terminal that generates the sound signal.
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KR20090058146A (en) * 2007-12-04 2009-06-09 한국전자통신연구원 Forgery-proof digital sound recording device
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Cited By (2)

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KR20200064711A (en) * 2018-11-29 2020-06-08 (주)드림시큐리티 Verification apparatus of smart speaker user using 2-channel authentication and method thereof
KR102168663B1 (en) * 2018-11-29 2020-10-22 (주)드림시큐리티 Verification apparatus of smart speaker user using 2-channel authentication and method thereof

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