KR20210084375A - Method, device and system for online contents data expiration - Google Patents

Abstract

An online content data expiration method includes: a step of receiving a playback request with respect to original content; a step of analyzing metadata in the header of the original content; a step of determining the expiration ratio of the original content based on the metadata; a step of causing the original content to expire in accordance with the expiration ratio; a step of correcting the metadata; and a step of playing back the original content. The metadata includes the final inspection date of the original content and an inspection cycle set for causing the original content to expire. The metadata correction step includes a step of correcting the final inspection date of the original content in a case where the original content is played back based on the set inspection cycle.

Description

Online content data destruction method, device and system {METHOD, DEVICE AND SYSTEM FOR ONLINE CONTENTS DATA EXPIRATION}

The present invention relates to an online content data destruction method, apparatus and system.

DRM (Digital Rights Management) refers to a technology for managing the copyright of digital content. In other words, it refers to products and services that prevent illegal distribution and copying of various digital contents such as e-books, music, video, games, software, stock information, and images, and provide profits generated through this to the copyright party. DRM includes encryption technology that gives users a secret key and watermarking technology that tracks illegal use by inserting copyright information into content.

In relation to this DRM technology, the prior art Korean Patent Application Laid-Open No. 2014-0047834 discloses a content security system and method.

In recent years, not only the copyright of the content, but also the individual's right to be forgotten online has become important. The right to be forgotten means to prioritize the protection of personal privacy over freedom of expression on the Internet, as the fact that digital data does not disappear is increasingly becoming a problem. In accordance with this purpose, technologies for making personal information and related contents disappear online are being developed.

An object of the present invention is to provide a method, apparatus and system for erasing online content data so that a digital content producer can protect privacy by setting a distribution period for content and gradually destroying the content within the period. Another object of the present invention is to provide a method, apparatus and system for erasing online content data so that, when an individual creates content, the content related to the individual disappears online over time. An object of the present invention is to provide a method, apparatus and system for erasing online content data that gradually destroys content when there is a viewer specialized for content, and enables content to be used in the existing way when there is no viewer specialized for content. However, the technical problems to be achieved by the present embodiment are not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, an embodiment of the present invention includes the steps of receiving a playback request for original content, analyzing metadata included in a header of the original content, based on the metadata to determine the extinction ratio of the original content, destroying the original content according to the extinction ratio, modifying the metadata, and reproducing the original content, wherein the metadata is a final inspection date of the original content and an inspection period set for destruction processing of the original content, wherein the step of modifying the metadata includes a final inspection date of the original content when the original content is reproduced based on the set inspection period It is possible to provide a method of destroying online content data including the step of modifying the

In addition, another embodiment of the present invention provides a receiving unit for receiving a reproduction request for the original content, an analysis unit for analyzing metadata included in a header of the original content, and an extinction rate of the original content based on the metadata. and a extinction ratio determining unit that determines the extinction ratio, an original content extinction unit that destroys the original content according to the extinction ratio, a management unit that corrects the metadata, and a playback unit that reproduces the original content, wherein the metadata is the original content. and a final inspection date of the original content and an inspection period set for destruction processing of the original content, wherein the management unit modifies the final inspection date of the original content when the original content is reproduced based on the set inspection period A device for destroying data may be provided.

In addition, another embodiment of the present invention includes a server and a content playback device that generate and add metadata to a header, wherein the content playback device receives a playback request for the original content, and adds it to the header of the original content. Analyze included metadata, determine an extinction rate of the original content based on the metadata, destroy the original content according to the extinction rate, modify the metadata, and reproduce the original content; The metadata includes a final inspection date of the original content and an inspection period set for destruction processing of the original content, and the content reproducing apparatus determines whether the original content is reproduced based on the set inspection period. It is possible to provide an online content data destruction system that corrects the last inspection date.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and detailed description.

According to any one of the above-described problem solving means of the present invention, a method and apparatus for erasing online content data so that a producer of digital content sets a distribution period for the content and gradually destroys the content within the period to protect privacy and systems. In addition, when an individual creates content, it is possible to provide a method, apparatus and system for erasing online content data so that the content related to the individual is destroyed online over time. It is possible to provide a method, apparatus and system for erasing online content data that gradually destroys the content when there is a viewer specialized for the content, and allows the content to be used in an existing manner when there is no viewer specialized for the content.

1 is a block diagram of an online content data destruction system according to an embodiment of the present invention.
2 is a flowchart illustrating a method of generating metadata in a server according to an embodiment of the present invention.
3 is a diagram illustrating an example of metadata according to an embodiment of the present invention.
4 is a block diagram of a content reproducing apparatus according to an embodiment of the present invention.
5A to 5C are diagrams for explaining a process of adding noise to original content according to an embodiment of the present invention.
6A and 6B are diagrams for explaining a process of destroying original content and modifying metadata of original content according to an embodiment of the present invention.
7 is a flowchart illustrating a method of destroying online content data according to whether or not metadata is manipulated according to an embodiment of the present invention.
8 is a flowchart illustrating a method of destroying online content data according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. . Also, when a part "includes" a component, it means that other components may be further included, rather than excluding other components, unless otherwise stated, and one or more other features However, it is to be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

In this specification, a "part" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. In addition, one unit may be implemented using two or more hardware, and two or more units may be implemented by one hardware.

Some of the operations or functions described as being performed by the terminal or device in the present specification may be instead performed by a server connected to the terminal or device. Similarly, some of the operations or functions described as being performed by the server may also be performed in a terminal or device connected to the server.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an online content data destruction system according to an embodiment of the present invention. Referring to FIG. 1 , the online content data destruction system 1 may include a server 110 and a content reproducing apparatus 120 . The server 110 and the content reproducing apparatus 120 shown in FIG. 1 exemplarily show components that can be controlled by the online content data destruction system 1 .

Each component of the online content data destruction system 1 of FIG. 1 is generally connected through a network. For example, as shown in FIG. 1 , the content reproducing apparatus 120 may be connected to the server 110 through a network.

The network refers to a connection structure in which information exchange is possible between each node, such as terminals and servers, and an example of such a network is Wi-Fi, Bluetooth, Internet, and Local Area (LAN). Network), Wireless Local Area Network (LAN), Wide Area Network (WAN), Personal Area Network (PAN), 3G, 4G, LTE, and the like.

The server 110 may receive a metadata generation request for the original content uploaded from the content manager terminal (not shown) or the content creator terminal (not shown). The server 110 may generate metadata associated with the original content according to the metadata generation request, and add the generated metadata to the header of the original content. A method of generating metadata related to content in the server 110 will be described in detail with reference to FIG. 2 .

2 is a flowchart illustrating a method of generating metadata in a server according to an embodiment of the present invention. Referring to FIG. 2 , the server 110 receives an input from a content manager terminal (not shown) or a content creator terminal (not shown) whether to generate metadata in the original content (S210). When the server 110 receives an input from the content manager terminal (not shown) or the content creator terminal (not shown) to not generate metadata for the original content (S211), the server 110 may not generate the metadata. have. Alternatively, when the server 110 receives an input to generate metadata for the original content from the content manager terminal (not shown) or the content creator terminal (not shown) ( S212 ), the server 110 transmits metadata associated with the original content. can be created and added to the header of the original content (S220). In this case, the server 110 may generate an electronic signature by using a part of the original content and metadata (S230), and may add the generated electronic signature to the header of the original content (S240).

In the above description, steps S210 to S240 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between steps may be changed.

3 is a diagram illustrating an example of metadata according to an embodiment of the present invention. Referring to FIG. 3 , the metadata may include a creation date of original content, a content lifetime, a final inspection date, an extinction method, and the like. For example, the server 110 generates metadata associated with the original content in which the creation date of the original content is '2014.1.1' through <CreateDay> and the lifetime of the original content is '12Month' through <Age>. can do.

Returning to FIG. 1 , when receiving a reproduction request for the original content from the user, the content reproducing apparatus 120 may analyze metadata included in the header of the original content. In this case, the content reproducing apparatus 120 may analyze the metadata according to whether a viewer to play the content includes a data destruction function. For example, when the content playback viewer does not include a data destruction function, the content playback apparatus 120 may directly play the original content. As another example, when the content playback viewer includes a data destruction function, the content playback apparatus 120 may analyze metadata of the original content.

The content reproducing apparatus 120 may determine the extinction rate of the original content based on the metadata. In this case, the extinction rate may be calculated based on the creation date of the original content, the last inspection date, and the content lifetime.

The content reproducing apparatus 120 may destroy the original content according to the extinction ratio. In this case, the content reproducing apparatus 120 may gradually or temporarily destroy the original content based on the extinction method included in the metadata of the original content. For example, the content reproducing apparatus 120 may add noise to the original content according to the extinction ratio. The content reproducing apparatus 120 may add noise to the original content at a predetermined position or at a random position based on the extinction method included in the metadata of the original content.

The content reproducing apparatus 120 may reproduce the original content after modifying the metadata. The content reproducing apparatus 120 may correct the last inspection date included in the metadata of the original content. For example, if the final inspection date of metadata included in the first uploaded original content is '2014.1.1' and the original content is played through a viewer with data destruction function in '2014.4.1', the content playback device 120 may modify the final inspection date included in the original content to '2014.4.1'.

4 is a block diagram of a content reproducing apparatus according to an embodiment of the present invention. Referring to FIG. 4 , the content reproducing apparatus 120 includes a receiving unit 410 , a digital signature extracting unit 420 , a manipulation determination unit 430 , an analysis unit 440 , an extinction ratio determining unit 450 , and original content. It may include an extinction unit 460 , a management unit 470 , and a reproduction unit 480 . In this case, a viewer including a data destruction function is installed in the content reproducing apparatus 120, and a configuration in which the original content is reproduced through the viewer will be described.

The receiver 410 may receive a reproduction request for the original content through the user interface.

The digital signature extraction unit 420 may extract the digital signature included in the header of the original content. In this case, the electronic signature may be generated based on the original content and metadata of the original content, and when the electronic signature is not included in the header of the original content, the analysis unit 440 immediately includes the information contained in the header of the original content. Metadata analysis can be performed.

The manipulation determination unit 430 may determine whether to manipulate the metadata based on the digital signature. In this case, when the metadata of the original content has been manipulated, the manipulation determination unit 430 may discard the original content or set the lifetime of the original content to a minimum value. For example, when the metadata of the original content is manipulated, the manipulation determination unit 430 may discard the original content or change the lifetime set in the metadata of the original content from '12Month' to '1Day'.

The analyzer 440 may analyze metadata included in the header of the original content. The metadata may include, for example, a creation date of the original content, a content lifetime, a last inspection date, an extinction method, and the like. For example, the analysis unit 440 analyzes the metadata included in the header of the original content, the initial creation date of the original content is '2014.1.1', the lifetime is '12 months', and the final inspection date is '2014.1.1'. , the extinction method can acquire information such as 'gradual extinction'.

The extinction rate determiner 450 may determine the extinction rate of the original content based on the metadata. Referring to Equation 1,

The extinction rate determining unit 450 may calculate the extinction rate of the original content based on the first creation date, the final inspection date, and the content lifetime of the original content.

The original content extinction unit 460 may destroy the original content according to the extinction ratio. For example, the original content annihilation unit 460 may destroy the original content by adding noise to the original content, and gradually or temporarily destroy the original content based on the extinction method included in the metadata of the original content. can do. A method of destroying the original content will be described in detail with reference to FIGS. 5A to 5C.

5A to 5C are diagrams for explaining a process of adding noise to original content according to an embodiment of the present invention.

5A is a diagram illustrating an image of an original original content. Referring to FIG. 5A , the first original content is an image uploaded to the server 110 from a content manager terminal (not shown) or a content creator terminal (not shown), and shows an image that has not been destroyed at all.

5B is a diagram in which noise is added to original content in a random manner. Referring to FIG. 5B , when the extinction rate determining unit 450 determines the extinction rate of the original content based on metadata included in the original content, the original content extinction unit 460 may destroy the original content according to the extinction rate. can In this case, the original content annihilation unit 460 may destroy the original content according to a random method, which is a policy of extinction of the original content. The original content extinction unit 460 may select a location to which the extinction ratio is applied within the range of the original content through a random algorithm. In this case, when the original content is an image, the original content extinction unit 460 may select a pixel position to which the extinction ratio is to be applied among the total number of X*Y pixels. The original content extinction unit 460 may select a location to which the extinction ratio is to be applied, and then add noise to the location. In this case, the original content destructor 460 may transform the corresponding position of the original content into a predetermined character or convert the value of the corresponding position to '0' to add noise to the corresponding position.

5C is a diagram in which noise is added to the original content in a predetermined positional manner. Referring to FIG. 5C , when the extinction rate determining unit 450 determines the extinction rate of the original content based on metadata included in the original content, the original content extinction unit 460 may destroy the original content according to the extinction rate. can In this case, the original content destruction unit 460 may destroy the original content according to a predetermined location method, which is a policy of extinction of the original content. The original content extinction unit 460 may calculate the modulus of pixels of the original content and select a location to which the extinction ratio is applied within the range of the original content. In this case, when the original content is an image, the original content destructor 460 may divide all X*Y pixels by modular 100 and classify them as 1 to 100. The original content extinction unit 460 may select a location to which the extinction ratio is to be applied, and then add noise to the corresponding location. In this case, the original content annihilator 460 may transform the noise into a character at the corresponding position of the original content or convert the value of the corresponding position to '0' to add noise to the corresponding position.

Returning to FIG. 4 again, the management unit 470 may modify metadata. In this case, the management unit 470 may correct the final inspection date included in the metadata of the original content. Also, the management unit 470 may update the digital signature included in the header of the original content. For example, in the case of an original content first created on '2014.5.1', the final inspection date of the corresponding original content may be '2014.5.1'. In this case, if it is set to perform the metadata check of the original content every three months, when performing the next metadata check, the management unit 470 may modify the final check date from '2014.5.1' to '2014.8.1'.

The playback unit 480 may reproduce the original content. In this case, the playback unit 480 may reproduce the original content through the content playback viewer.

6A and 6B are diagrams for explaining a process of destroying original content and modifying metadata of the original content according to an embodiment of the present invention.

6A is a diagram illustrating original content. Referring to FIG. 6A , the original content 610 may include metadata 620 and a digital signature 630 in a header. In this case, the content reproducing apparatus 120 may extract the electronic signature 630 of the original content, determine whether the metadata has been manipulated, and then analyze the metadata 620 . The content playback device 120 analyzes the metadata to analyze original content such as 'first creation date: 2014.1.1', 'lifetime: 12 months', 'last inspection date: 2014.1.1', 'processing method: gradual disappearance' It is possible to obtain information necessary for the destruction of In this case, the metadata of the original content may be set to be checked every month.

에 따라, 원본 콘텐츠의 소멸 비율을

로 계산해내고, 원본 콘텐츠의 영상 또는 이미지를 25% 소멸되도록 노이즈(660)를 추가할 수 있다. 또한, 콘텐츠 재생 장치(120)는 메타데이터(670)의 검사가 완료되면, 메타데이터(670)의 최종 검사일을 '2014.4.1'로 수정하고, 전자서명을 갱신하여 저장할 수 있다. 6B is a diagram illustrating an original content that has been partially destroyed. Referring to FIG. 6B , the original content 650 may include metadata 670 and a digital signature 680 in a header. In this case, the content reproducing apparatus 120 extracts the electronic signature 680 of the original content, determines whether the metadata has been manipulated, and then analyzes the metadata 670 . For example, if the metadata of the original content is set to be checked every one month and the metadata of the original content is checked when 3 months have elapsed from the first creation date, the content playback device 120 is

Accordingly, the rate of extinction of the original content

, and noise 660 may be added so that the image or image of the original content is destroyed by 25%. Also, when the inspection of the metadata 670 is completed, the content reproducing apparatus 120 may modify the final inspection date of the metadata 670 to '2014.4.1', and update and store the electronic signature.

7 is a flowchart illustrating a method of destroying online content data according to whether or not metadata is manipulated according to an embodiment of the present invention. Referring to FIG. 7 , the content reproducing apparatus 120 determines whether an extinction verification time for the original content has been reached ( S710 ). At this time, if the original content has not reached the expiration verification time (S711), the content playback device 120 immediately plays the original content, and when the original content reaches the expiration verification time (S712), the content playback device ( 120) determines whether or not the metadata is manipulated based on the digital signature (S720). At this time, if it is determined that the metadata has been manipulated (S731), the content playback device 120 discards the original content or sets the lifetime of the original content to the minimum value (S740), and determines the extinction rate of the original content, (S750), when it is determined that the metadata has not been manipulated (S732), the content reproducing apparatus 120 may directly determine the extinction rate of the original content (S750). The content reproducing apparatus 120 may gradually or temporarily destroy the original content based on the extinction method (S760). The content reproducing apparatus 120 may correct the last inspection date of the metadata (S770) and update the electronic signature (S780).

In the above description, steps S710 to S780 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between steps may be changed.

8 is a flowchart illustrating a method of destroying online content data according to an embodiment of the present invention. The online content data destruction method performed by the content reproducing apparatus 120 according to the embodiment shown in FIG. 8 includes steps processed in time series in the online content data destruction system 1 according to the embodiment shown in FIG. 1 . include Therefore, even if omitted below, the content already described with respect to the online content data destruction system 1 according to the embodiment shown in FIG. 1 is performed by the content reproducing apparatus 120 according to the embodiment shown in FIG. 8 . It also applies to the method of destroying online content data.

In step S810, the content reproducing apparatus 120 receives a reproduction request for the original content. In step S820, the content reproducing apparatus 120 analyzes metadata included in the header of the original content. In this case, the metadata may include one or more of a creation date of the original content, a content lifespan, a final inspection date, and an extinction method. In step S830, the content reproducing apparatus 120 determines the extinction rate of the original content based on the metadata. In this case, the extinction rate may be calculated based on the creation date of the original content, the last inspection date, and the content lifetime. In step S840, the content reproducing apparatus 120 may destroy the original content according to the extinction ratio. At this time, the content reproducing apparatus 120 may destroy the original content by adding noise to the original content, and may gradually or temporarily destroy the original content based on the extinction method included in the metadata of the original content. have. In operation S850, the content reproducing apparatus 120 may modify metadata. In this case, in step S850, the content reproducing apparatus 120 may further include the step of correcting the last inspection date of the original content. In step S860, the content reproducing apparatus 120 may reproduce the original content.

Although not shown in FIG. 8 , the content reproducing apparatus 120 may further include extracting the digital signature included in the header of the original content and determining whether metadata is manipulated based on the digital signature. The digital signature may be generated based on the original content and metadata. In this case, if it is determined that the metadata has been manipulated, the content reproducing apparatus 120 may further include discarding the original content or setting the lifetime of the original content to a minimum value.

Although not shown in FIG. 8 , the content reproducing apparatus 120 may further include updating the digital signature included in the header of the original content.

In the above description, steps S810 to S860 may be further divided into additional steps or combined into fewer steps according to an embodiment of the present invention. In addition, some steps may be omitted as necessary, and the order between steps may be changed.

The online content data destruction method performed by the content reproducing apparatus 120 described with reference to FIG. 8 may also be implemented in the form of a recording medium including instructions executable by a computer, such as a program module executed by a computer. . Computer-readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. Also, computer-readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism, and includes any information delivery media.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

110: server
120: content playback device
410: receiver
420: digital signature extraction unit
430: operation determination unit
440: analysis unit
450: extinction rate determining unit
460: original content extinction part
470: management
480: playback unit

Claims (17)

A method of destroying online content data performed in a content reproducing device, the method comprising:
receiving a play request for the original content;
analyzing metadata included in a header of the original content;
determining an extinction rate of the original content based on the metadata;
destroying the original content according to the extinction ratio;
modifying the metadata; and
Playing the original content
including,
The metadata includes a final inspection date of the original content and an inspection period set for destruction processing of the original content,
Modifying the metadata includes:
and when the original content is reproduced based on the set inspection period, correcting a last inspection date of the original content.
The method of claim 1,
determining whether the metadata has been manipulated; and
When the metadata is manipulated, the method further comprising the step of setting the lifetime of the original content to a minimum value.
3. The method of claim 2,
The method of destroying online content data, wherein the metadata further includes a content lifespan and an extinction method.
4. The method of claim 3,
When the metadata has been manipulated, the method further comprising the step of shortening a content lifespan of the original content based on the extinction method.
4. The method of claim 3,
The extinction rate is
The method of destroying online content data, which is calculated based on the creation date of the original content, the last inspection date, and the content lifetime.
The method of claim 1,
The step of destroying the original content comprises:
Selecting some pixels at random positions to be destroyed from among all the pixels of the original content, and adding noise to the positions of the partial pixels, the method of destroying online content data.
7. The method of claim 6,
The step of adding noise to the position of some pixels includes:
The method of destroying online content data, comprising the step of transforming the position of some of the pixels into a predetermined character or converting the value of the corresponding position to 0.
The method of claim 1,
The step of analyzing the metadata includes:
and analyzing the metadata only when a viewer to play the original content includes a data destruction function.
An apparatus for destroying online content data, comprising:
a receiving unit for receiving a reproduction request for the original content;
an analysis unit for analyzing metadata included in the header of the original content;
an extinction rate determining unit configured to determine an extinction rate of the original content based on the metadata;
an original content extinction unit that destroys the original content according to the extinction ratio;
a management unit for modifying the metadata; and
and a playback unit for playing the original content,
The metadata includes a final inspection date of the original content and an inspection period set for destruction processing of the original content,
When the original content is reproduced based on the set inspection period, the management unit modifies the last inspection date of the original content.
10. The method of claim 9,
Further comprising a manipulation determination unit for determining whether the metadata has been manipulated,
The manipulation determination unit, when the metadata is manipulated, sets the lifetime of the original content to a minimum value.
11. The method of claim 10,
Wherein the metadata further includes a content lifespan and an extinction method.
12. The method of claim 11,
Wherein the manipulation determination unit shortens the content lifespan of the original content based on the destruction method when the metadata is manipulated.
12. The method of claim 11,
The extinction rate is
The device for destroying online content data, which is calculated based on the creation date of the original content, the last inspection date, and the content lifetime.
10. The method of claim 9,
The device for destroying online content data, wherein the original content extinction unit selects some pixels at random positions to be destroyed among all the pixels of the original content, and adds noise to the positions of the partial pixels.
15. The method of claim 14,
The device for destroying online content data, wherein the original content extinction unit transforms the position of some pixels into a predetermined character or converts the value of the corresponding position to 0.
10. The method of claim 9,
The apparatus for destroying online content data, wherein the analyzing unit analyzes the metadata only when a viewer that plays the original content includes a data destruction function.
In the online content data destruction system,
a server that generates metadata and adds it to the header; and
including content playback devices;
The content playback device,
Receive a playback request for the original content, analyze metadata included in the header of the original content, determine the extinction ratio of the original content based on the metadata, and destroy the original content according to the extinction ratio and modify the metadata, play the original content,
The metadata includes a final inspection date of the original content and an inspection period set for destruction processing of the original content,
The content playback device,
When the original content is reproduced based on the set inspection period, the last inspection date of the original content is corrected.

Images