KR20160047827A - Method, device and system for online contents data expiration - Google Patents

Abstract

The present invention relates to a method for removing online content data, an apparatus thereof, and a system thereof. The method for removing online content data of the present invention comprises the steps of: receiving a request to play original content; analyzing metadata included in a header of the original content; determining a removal rate for the original content based on the metadata; removing the original content according to the removal rate; revising the metadata; and playing the original content. The method for removing online content data of the present invention can gradually remove content in a corresponding period by allowing a producer of digital content to set an expiration period, thereby protecting privacy.

Description

TECHNICAL FIELD [0001] The present invention relates to an online content data destruction method,

The present invention relates to a method, apparatus and system for eliminating online content data.

DRM (Digital Rights Management) is a technology for managing copyright of digital contents. That is, goods and services that prevent illegal distribution and copying of various digital contents such as e-books, music, video, games, software, stock information, images and so on, and provide the copyrighted interests to them. DRM includes a cryptographic technique for giving a secret key to a user and a watermarking technique for inserting copyright information into the content to track illegal use.

In connection with such DRM technology, Korean Patent Laid-Open Publication No. 2014-0047834 discloses a content security system and method.

Recently, not only the copyright of the contents but also the right of the individual to be forgotten online has become important. The right to be forgotten means that digital data is not lost, which means that privacy is more important than freedom of expression on the Internet. With this in mind, technologies are being developed that eliminate personal information and related content online.

An apparatus and a system for destroying online contents data by allowing a producer of digital contents to set a circulation period in the contents and gradually destroying the contents within the period, thereby protecting privacy. Also, an object of the present invention is to provide a method, apparatus, and system for destroying online content data, in which, when an individual generates a content, content related to an individual over time is extinguished on-line. An apparatus and a system for destroying an online content data in which the content is gradually destroyed when the viewer is specialized for the content and the content is available in a conventional manner when there is no viewer specialized for the content. It is to be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to an aspect of the present invention, there is provided a method of reproducing a content including the steps of receiving a playback request for an original content, analyzing metadata included in a header of the original content, A method of decrypting the online content data, the method comprising: determining an extinction ratio of the original content; destroying the original content according to the extinction ratio; modifying the metadata; and playing the original content Can be provided.

According to another embodiment of the present invention, there is provided an information processing apparatus including a receiving unit for receiving a reproduction request for an original content, an analyzing unit for analyzing the metadata included in the header of the original content, An extinction ratio determiner for determining an extinction ratio of the original content, an original content destruction unit for destroying the original content according to the extinction ratio, a management unit for modifying the metadata, and a playback unit for playing back the original content can do.

According to still another embodiment of the present invention, there is provided a server including a server for generating metadata and adding it to a header, and a content reproduction apparatus, wherein the content reproduction apparatus receives a reproduction request for the original content, Determining the extinction ratio of the original content based on the meta data, destroying the original content according to the extinction ratio, modifying the meta data, and reproducing the original content Can be provided.

The above-described task solution is 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 the detailed description of the invention.

According to any one of the above-mentioned objects of the present invention, there is provided an online content data destruction method and apparatus which enable a manufacturer of a digital content to set a distribution period in a content and progressively destroying the content within the period, And a system. In addition, it is possible to provide a method, apparatus, and system for destroying online content data, in which, when an individual generates a content, the content related to the individual is extinguished online over time. An apparatus and a system for destroying an online content data in which the content is progressively destroyed when the viewer is specialized for the content and the content is available in a conventional 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 exemplary 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 configuration diagram of a content reproduction apparatus according to an embodiment of the present invention.
5A to 5C are views for explaining a process of adding noise to original contents according to an embodiment of the present invention.
FIGS. 6A and 6B are diagrams for explaining a process of destroying original content and correcting metadata of original content according to an embodiment of the present invention.
FIG. 7 is a flowchart illustrating a method for destroying online content data according to whether 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.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "including" an element, it is to be understood that the element may include other elements as well as other elements, And does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

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

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

Hereinafter, embodiments 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 playback apparatus 120. The server 110 and the content reproduction apparatus 120 shown in FIG. 1 illustratively show the components that can be controlled by the online content data destruction system 1.

The components of the online content data destruction system 1 of FIG. 1 are generally connected through a network. For example, as shown in FIG. 1, the content reproduction apparatus 120 may be connected to the server 110 through a network.

A network refers to a connection structure in which information can be exchanged between nodes such as terminals and servers. An example of such a network is Wi-Fi, Bluetooth, Internet, LAN Network, wireless LAN, WAN, PAN, 3G, 4G, LTE, and the like.

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

2 is a flowchart illustrating a method of generating metadata in a server according to an exemplary embodiment of the present invention. Referring to FIG. 2, the server 110 receives from the content manager terminal (not shown) or the content creator terminal (not shown) whether or not to generate the meta data in the original content (S210). When the server 110 receives input from the content manager terminal (not shown) or the content creator terminal (not shown) so as not to generate the metadata about the original content (S211), the server 110 may not generate the metadata have. Alternatively, when the server 110 is inputted from the content manager terminal (not shown) or the content creator terminal (not shown) to generate metadata for the original content (S212), the server 110 stores the metadata May be generated and added to the header of the original content (S220). At this time, the server 110 generates a digital signature using a part of the original content and the metadata (S230), and may add the generated digital 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. Also, some of the steps may be omitted as necessary, and the order between the 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 examination date, a destruction method, and the like. For example, the server 110 generates metadata associated with the original content having the generation date of the original content as '2014.1.1' and the lifetime of the original content as '12Month' through the <Age> through the <CreateDay> can do.

Referring back to FIG. 1, when the content reproduction apparatus 120 receives the reproduction request for the original content from the user, the content reproduction apparatus 120 may analyze the metadata included in the header of the original content. At this time, the content reproduction apparatus 120 may analyze the metadata according to whether or not the viewer for reproducing the content includes a data destruction function. For example, when the content reproduction viewer does not include the data destruction function, the content reproduction apparatus 120 can directly reproduce the original content. In another example, when the content playback viewer includes a data destruction function, the content playback apparatus 120 may analyze the metadata of the original content.

The content reproduction apparatus 120 can determine the extinction ratio of the original content based on the meta data. At this time, the extinction ratio can be calculated based on the generation date of the original content, the final inspection date, and the content lifetime.

The content reproduction apparatus 120 may extinguish the original content according to the extinction ratio. At this time, the content reproduction apparatus 120 may progressively or temporarily extinguish the original content based on the extinction method included in the meta data of the original content. For example, the content reproduction apparatus 120 may add noise to the original content according to the extinction ratio. The content reproduction apparatus 120 may add noise to the original content to a predetermined position or a random position based on the extinction method included in the metadata of the original content.

The content reproduction apparatus 120 can reproduce the original content after correcting the metadata. The content reproduction apparatus 120 may modify the final inspection date included in the metadata of the original content. For example, if the final check date of the metadata included in the originally uploaded original content is '2014.1.1' and the original content is reproduced through the viewer including the data destruction function in '2014.4.1' Quot; 2014.4.1 &quot;, which is included in the original content.

4 is a configuration diagram of a content reproduction apparatus according to an embodiment of the present invention. 4, the contents reproducing apparatus 120 includes a receiving unit 410, an electronic signature extracting unit 420, an operation determining unit 430, an analyzing unit 440, an extinction ratio determining unit 450, An extinction unit 460, a management unit 470, and a playback unit 480. At this time, the content reproduction apparatus 120 is provided with a viewer including a data destruction function, and a configuration in which original content is reproduced through the viewer will be described.

The receiving unit 410 may receive a playback request for the original content through the user interface.

The digital signature extracting unit 420 can extract the digital signature contained in the header of the original content. In this case, the digital signature may be generated based on the original content and the metadata of the original content. If the digital signature is not included in the header of the original content, Analysis of the metadata can be performed.

The operation determination unit 430 can determine whether to operate the meta data based on the digital signature. At this time, when the metadata of the original content is manipulated, the operation determination unit 430 can discard the original content or set the life span of the original content to a minimum value. For example, when the metadata of the original content is manipulated, the operation determination unit 430 may discard the original content or change the lifetime set in the metadata of the original content from '12 Mon' to '1 Da'.

The analyzer 440 may analyze the metadata included in the header of the original content. The metadata may include, for example, the date of creation of the original content, the life of the content, the date of the last examination, and the method of extinction. For example, the analysis unit 440 analyzes the metadata included in the header of the original content to determine that the first generation date of the original content is '2014.1.1', the lifetime is '12 months', the final inspection date is '2014.1.1' , And the extinction method can acquire information such as 'gradual disappearance'.

The extinction ratio determining unit 450 can determine the extinction ratio of the original content based on the metadata. Referring to Equation 1,

The extinction ratio determining unit 450 can calculate the extinction ratio of the original content based on the date of the first creation of the original content, the date of the last examination, and the life of the content.

The original content destruction unit 460 may destroy the original content according to the destruction ratio. For example, the original content destruction unit 460 may add the noise to the original content, thereby destroying the original content. The original content may be progressively or temporarily extinguished based on the destruction method included in the metadata of the original content can do. With respect to the method of destroying the original contents, the details will be described with reference to FIGS. 5A to 5C.

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

5A is a diagram showing an image of the original content. Referring to FIG. 5A, the first original content is an image uploaded from the content manager terminal (not shown) or the content creator terminal (not shown) to the server 110, showing no image at all.

5B is a diagram in which noise is added to the original content in a random manner. Referring to FIG. 5B, when the extinction ratio determining unit 450 determines the extinction ratio of the original content based on the metadata included in the original content, the original content destructor 460 cancels the original content according to the extinction ratio . At this time, the original content destruction unit 460 can destroy the original content according to the random method, which is a destruction policy of the original content. The original content destruction unit 460 can select a location to which the extinction ratio is to be applied within the range of the original content through the random algorithm. At this time, if the original content is an image, the original content destruction unit 460 can select a pixel location to which the extinction ratio is applied from the total number of X * Y pixels. The original content destruction unit 460 may add a noise to a corresponding location after selecting a location to which the destruction rate is to be applied. At this time, the original content destruction unit 460 may transform the corresponding position of the original content into the pre-designated character or add the noise to the corresponding position by converting the value of the corresponding position to '0'.

5C is a diagram in which noise is added to the original content in a fixed position manner. Referring to FIG. 5C, when the extinction ratio determining unit 450 determines the extinction ratio of the original content based on the metadata included in the original content, the original content extinction unit 460 cancels the original content according to the extinction ratio . At this time, the original content destruction unit 460 can destroy the original content according to the fixed position method, which is a policy of disappearance of the original content. The original content destruction unit 460 may calculate a modulus of pixels of the original content and select a location to which the destruction rate is applied within the range of the original content. In this case, if the original content is an image, the original content destruction unit 460 may divide the entire X * Y pixel into the modular 100 and divide it into 1 to 100. The original content destruction unit 460 may add a noise to a corresponding location after selecting a location to which the destruction rate is to be applied. At this time, the original content destruction unit 460 may transform the noise to a predetermined character of the corresponding position of the original content, or convert the value of the corresponding position to '0', and add noise to the corresponding position.

Returning to FIG. 4, the management unit 470 may modify the metadata. At this time, the management unit 470 can modify the final inspection date included in the metadata of the original content. In addition, the management unit 470 can update the digital signature contained in the header of the original content. For example, for original content originally created in '2014.5.1,' the final date of the original content review may be '2014.5.1.' At this time, when the inspection of the metadata of the original content is set to be performed every three months, the management unit 470 may change the final inspection date from '2014.5.1' to '2014.8.1' at the next metadata inspection.

The reproducing unit 480 can reproduce the original content. At this time, the playback unit 480 can play back the original content through the content playback viewer.

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

6A is a diagram showing an original content. Referring to FIG. 6A, the original content 610 may include metadata 620 and an electronic signature 630 in a header. At this time, the content reproduction apparatus 120 can analyze the metadata 620 after extracting the digital signature 630 of the original content and determining whether the metadata is manipulated. The content reproduction apparatus 120 may analyze the metadata to analyze the original contents such as 'first creation date 2014.1.1', 'life span 12 months', 'final inspection date 2014.1.1', 'processing method: progressive disappearance' It is possible to acquire information necessary for the annihilation processing of FIG. At this time, 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. FIG. 6B is a diagram showing an original content in which some annihilation processing has been performed. Referring to FIG. 6B, the original content 650 may include metadata 670 and an electronic signature 680 in a header. At this time, the content reproduction apparatus 120 can analyze the metadata 670 after extracting the digital signature 680 of the original content to determine whether the metadata is manipulated. For example, if the metadata of the original content is set to be inspected every month and the metadata of the original content is inspected 3 months after the first creation date, the content reproduction apparatus 120

, The rate of extinction of the original content

And the noise 660 can be added so that the image or image of the original content is eliminated by 25%. When the metadata 670 is checked, the content reproduction apparatus 120 may modify the final inspection date of the metadata 670 to '2014.4.1', and update and store the digital signature.

FIG. 7 is a flowchart illustrating a method for destroying online content data according to whether metadata is manipulated according to an embodiment of the present invention. Referring to FIG. 7, the content reproduction apparatus 120 determines whether the expiration verification time for the original content has been reached (S710). At this time, if the original content has not reached the destruction verification time (S711), the content reproduction apparatus 120 immediately reproduces the original content. When the original content reaches the destruction verification time (S712) 120 determines whether the metadata is manipulated based on the digital signature (S720). At this time, if it is determined that the metadata has been operated (S731), the content reproduction apparatus 120 discards the original content or sets the lifetime of the original content to the minimum value (S740), determines the extinction ratio of the original content (S750). If it is determined that the metadata is not operated (S732), the content reproduction apparatus 120 can immediately determine the extinction ratio of the original content (S750). The content reproduction apparatus 120 may progressively or temporarily extinguish the original content based on the destruction method (S760). The content reproduction apparatus 120 may modify the final inspection date of the metadata (S770) and update the digital signature (S780).

In the above description, steps S710 to S780 may be further divided into further steps or combined into fewer steps, according to an embodiment of the present invention. Also, some of the steps may be omitted as necessary, and the order between the 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 method for destroying on-line content data performed by the content reproducing apparatus 120 according to the embodiment shown in FIG. 8 includes steps performed in a time-series manner in the online content data destroying system 1 according to the embodiment shown in FIG. 1 . 1, 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 playback apparatus 120 according to the embodiment shown in FIG. 8 And the method of destroying online content data.

In step S810, the content reproduction apparatus 120 receives a reproduction request for the original content. In step S820, the content reproduction apparatus 120 analyzes the metadata included in the header of the original content. At this time, the metadata may include at least one of a generation date of the original content, a life span of the content, a final inspection date, and a destruction method. In step S830, the content reproduction apparatus 120 determines the extinction ratio of the original content based on the meta data. At this time, the extinction ratio can be calculated based on the generation date of the original content, the final inspection date, and the content lifetime. In step S840, the content reproduction apparatus 120 may extinguish the original content according to the extinction ratio. At this time, the content reproduction apparatus 120 can annihilate the original content by adding noise to the original content, and can gradually or temporarily extinguish the original content based on the destruction method included in the meta data of the original content have. In step S850, the content reproduction apparatus 120 may modify the metadata. At this time, in step S850, the content reproduction apparatus 120 may further include a step of modifying the final inspection date of the original content. In step S860, the content reproduction apparatus 120 can reproduce the original content.

Although not shown in FIG. 8, the content reproduction apparatus 120 may further include extracting a digital signature included in the header of the original content, and determining whether the metadata is manipulated based on the digital signature. The digital signature can be generated based on the original content and the metadata. At this time, if it is determined that the metadata has been manipulated, the content reproduction 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 reproduction 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 further steps or combined into fewer steps, according to an embodiment of the present invention. Also, some of the steps may be omitted as necessary, and the order between the steps may be changed.

8 may 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. In addition, the computer-readable medium can 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 any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

110: Server
120: Content playback device
410:
420: Digital signature extracting unit
430: Operation judgment unit
440: Analysis section
450: extinction ratio determining section
460: original content destruction unit
470:
480:

Claims (21)

A method for destroying online content data,
Receiving a playback request for original content;
Analyzing the metadata included in the header of the original content;
Determining an extinction ratio of the original content based on the metadata;
Destroying the original content according to the extinction ratio;
Modifying the metadata; And
Reproducing the original content
And decrypting the online content data.
The method according to claim 1,
Extracting an electronic signature included in a header of the original content; And
Determining whether the metadata is manipulated based on the electronic signature
Further comprising the steps of:
3. The method of claim 2,
Wherein the electronic signature is generated based on the original content and the metadata.
3. The method of claim 2,
Wherein the step of determining whether the metadata is manipulated comprises:
Further comprising discarding the original content or setting a lifetime of the original content to a minimum value when the metadata is manipulated.
The method according to claim 1,
Wherein the metadata includes at least one of a generation date of the original content, a life span of a content, a final inspection date, and a destruction method.
The method according to claim 1,
Preferably,
Wherein the content is calculated based on a date of creation of the original content, a date of final examination, and a lifetime of the content.
The method according to claim 1,
The step of destroying the original content comprises:
Wherein the original content is progressively or temporarily extinguished based on an extinction method included in the meta data of the original content.
The method according to claim 1,
Wherein the modifying the metadata comprises:
Further comprising modifying a last date of the inspection of the original content.
The method according to claim 1,
Further comprising the step of updating the electronic signature included in the header of the original content.
The method according to claim 1,
The step of destroying the original content comprises:
And adding noise to the original content.
An apparatus for destroying online content data,
A receiver for receiving a playback request for original content;
An analyzer for analyzing the metadata included in the header of the original content;
An extinction ratio determining unit that determines an extinction ratio of the original content based on the metadata;
An original content destruction unit for destroying the original content according to the destruction ratio;
A management unit for modifying the metadata; And
And a playback unit for playing back the original content.
12. The method of claim 11,
An electronic signature extracting unit for extracting an electronic signature included in a header of the original content; And
Further comprising an operation determination unit operable to determine whether the meta data is manipulated based on the digital signature.
13. The method of claim 12,
Wherein the electronic signature is generated based on the original content and the metadata of the original content.
13. The method of claim 12,
Wherein the operation-
And when the metadata is manipulated, discarding the original content or setting the lifetime of the original content to a minimum value.
12. The method of claim 11,
Wherein the meta data includes at least one of a generation date of the original content, a life span of the content, a final inspection date, and a destruction method.
12. The method of claim 11,
Preferably,
And the content is calculated on the basis of a generation date of the original content, a final inspection date, and a content life span.
12. The method of claim 11,
Wherein the original content destruction unit comprises:
Wherein the original content is progressively or temporarily extinguished based on an extinction method included in the meta data of the original content.
12. The method of claim 11,
Wherein,
And corrects the final inspection date included in the metadata of the original content.
12. The method of claim 11,
Wherein,
And updates the electronic signature included in the header of the original content.
12. The method of claim 11,
Wherein the original content destruction unit comprises:
And adding noise to the original content based on a method of destroying the metadata included in the original content.
A system for destroying online content data,
A server for generating and adding metadata to a header; And
A content reproduction apparatus comprising:
The content playback apparatus may further include:
A method of processing a content, comprising: receiving a playback request for an original content; analyzing the metadata included in the header of the original content; determining an extinction ratio of the original content based on the meta data; The metadata is modified, and the original content is played back.

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