KR20140130292A - Server apparatus and method for modifying license corresponding to encrypted contents applied drm - Google Patents

Server apparatus and method for modifying license corresponding to encrypted contents applied drm Download PDF

Info

Publication number
KR20140130292A
KR20140130292A KR1020130048356A KR20130048356A KR20140130292A KR 20140130292 A KR20140130292 A KR 20140130292A KR 1020130048356 A KR1020130048356 A KR 1020130048356A KR 20130048356 A KR20130048356 A KR 20130048356A KR 20140130292 A KR20140130292 A KR 20140130292A
Authority
KR
South Korea
Prior art keywords
license
terminal device
modification
management server
binding
Prior art date
Application number
KR1020130048356A
Other languages
Korean (ko)
Inventor
이성우
Original Assignee
(주)잉카엔트웍스
인텔렉추얼디스커버리 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)잉카엔트웍스, 인텔렉추얼디스커버리 주식회사 filed Critical (주)잉카엔트웍스
Priority to KR1020130048356A priority Critical patent/KR20140130292A/en
Publication of KR20140130292A publication Critical patent/KR20140130292A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

Disclosed is a method of modifying a license corresponding to content which is encrypted by a digital rights management scheme of a license management server device. The modifying method according to the present invention comprises: a step of receiving a modification request for a first license from a terminal device having the first license, whose usage rights are to be modified; a step of modifying a binding element, which binds the first license, to generate a new license according to the received modification request; and a step of transmitting the generated new license to the terminal device.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for modifying a license corresponding to content encrypted by a DRM method,

The present invention relates to an apparatus and a method for modifying a license corresponding to content encrypted by a DRM method, and more particularly, to a DRM method for transferring a license corresponding to content encrypted by a DRM method to another person, The present invention relates to an apparatus and a method for modifying a license corresponding to content encrypted with a license.

As computer technology has developed and popularized, the contents of general commerce (books, comics, recordings, movies, broadcasts, newspapers, etc.), which are produced, stored and managed in analog form, are becoming digitized.

It is easy to modify and copy (persistent high quality), easy to copy and modify even though it is used repeatedly indefinitely, and it is possible to transmit and distribute even a large amount of works in a short time using a high speed communication network The digital characteristics and advantages of easy to transfer and distribute are digitizing the analog form of work quickly.

However, the merits of such digital contents are also a factor that infringes on the rights and interests of original authors. Because it is the same as the original even if it has a copy, it weakens the intention to purchase the original, and because it is easy to modify and copy without the author's consent, the copyright theft becomes easy and the ease of delivery and distribution is illegal. It is possible to make even legal control impossible.

These negative factors can reduce the morale of the authors, reduce the willingness to make the works, and even cause the digitalization to hesitate. Therefore, there is a need for a technical protection device capable of efficiently managing copyright while fully utilizing the advantages of digital for digital contents.

In order to protect the interests and rights of digital contents, DRM (Digital Rights Management) technology has been applied to digital contents and various DRM methods have been used.

Here, the DRM is a right of each subject (content creator, distributor, distributor, user, copyright holder, etc.) participating in the lifecycle of digital contents (i.e., creation, processing, distribution and consumption of contents) And protects profits, and supports a series of technologies that support billing and payment processing for digital content usage.

Accordingly, the server for providing the digital contents using the DRM scheme encrypts and transmits the digital contents, and the license management server transmits the license to the legitimate user so that the legitimate user can reproduce and output the digital contents. Here, the license includes a digital content encryption key used for decrypting the digital content and digital content use right information, which is information about digital content use.

On the other hand, conventionally, there has been no provision for activating transfer / transfer of the above-mentioned license to another person or transfer of the license from another person. For example, when DRM-based content is distributed from a primary user to a secondary user (DRM Super-Distribution), the secondary user issues a license for the content in order to issue a license corresponding to the distributed content I was able to get a license only from the pre-designated license management server that issued it.

In other words, conventionally, there has not been proposed a method of modifying an existing license so that it can be transferred to another person or transferred from another person. Accordingly, a license transfer server or another license management server that performs a function of a used license transaction market, But it did not provide a way to do it.

It is an object of the present invention to provide an apparatus and a method for generating a modified license by modifying a binding element for a license corresponding to content encrypted with a DRM method.

According to another aspect of the present invention, there is provided a method of modifying a license corresponding to content encrypted with a DRM method of a license management server apparatus according to an exemplary embodiment of the present invention, 1 licenses, modifying a binding element binding the first license according to the received modification request to generate a new license, and transmitting the generated new license to the terminal device .

The binding element may be unique identification information of the terminal device or unique identification information of the user to the terminal device, and the modification request may include at least one of the first license, the content information corresponding to the first license, And may include a scope of modification of the permissions for the license.

The generating step generates a second license from which a binding element binding the first license is removed if the modification range is a range that removes all the usage rights for the first license, A third license having a binding element that removes some usage rights of the first license and binds the first license and a third license having a binding element that binds the first license to a part removed from the third license, It is possible to generate a fourth license having the use permission and the binding element removed.

According to another aspect of the present invention, there is provided a license management server apparatus for modifying a license corresponding to content encrypted with a DRM scheme, the apparatus comprising: A communication unit for receiving the modification request of the first license and a binding unit for binding the first license according to the received modification request to generate a new license and to transmit the generated new license to the terminal device And a control unit for controlling the communication unit.

The binding element may be unique identification information of the terminal device or unique identification information of the user to the terminal device, and the modification request may include at least one of the first license, the content information corresponding to the first license, And may include a scope of modification of the permissions for the license.

The control unit may generate a second license from which the binding element binding the first license is removed if the modification range is a range that removes all use rights to the first license, 1 license, a third license having a binding element that removes some of the usage rights of the first license and binds the first license, and a third license having a binding permission to bind some of the usage rights removed from the third license To generate a fourth license with the binding element removed.

According to various embodiments of the present invention described above, it is possible to remove the binding element from the modification requested license and generate a modified license that can be transferred to another person. Accordingly, the transaction of the license corresponding to the content encrypted by the DRM method can be activated.

FIG. 1 illustrates a system for modifying a license corresponding to content encrypted with a DRM scheme according to an embodiment of the present invention; FIG.
2 is a flowchart illustrating a method for modifying a device binding license corresponding to content encrypted with a DRM scheme according to an embodiment of the present invention;
3 is a flowchart illustrating a method for modifying a user binding binding license corresponding to content encrypted according to the DRM scheme according to an embodiment of the present invention.
4 is a diagram illustrating a license management server apparatus for modifying a user binding corresponding to content encrypted with a DRM scheme according to an embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, only intended for the purpose of enabling understanding of the concepts of the present invention, and are not to be construed as limited to such specifically recited embodiments and conditions do.

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of the currently known equivalents as well as the equivalents to be developed in the future, i.e., the structure.

Thus, for example, it should be understood that the block diagrams herein represent conceptual views of exemplary circuits embodying the principles of the invention. Similarly, all flowcharts, state transition diagrams, pseudo code, and the like are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether or not the computer or processor is explicitly shown .

The functions of the various elements shown in the figures, including the functional blocks depicted in the processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

Also, the explicit use of terms such as processor, control, or similar concepts should not be interpreted exclusively as hardware capable of running software, and may be used without limitation as a digital signal processor (DSP) (ROM), random access memory (RAM), and non-volatile memory. Other hardware may also be included.

In the claims hereof, the elements represented as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements performing the function or firmware / microcode etc. , And is coupled with appropriate circuitry to execute the software to perform the function. It is to be understood that the invention defined by the appended claims is not to be construed as encompassing any means capable of providing such functionality, as the functions provided by the various listed means are combined and combined with the manner in which the claims require .

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a system for modifying a license corresponding to content encrypted with a DRM scheme according to an embodiment of the present invention. Referring to FIG. 1, a system 1000 includes a DB connected to a terminal device 100, a license management server device 200, and a license management server device 200.

The terminal device 100 can store a license corresponding to the content encrypted with the DRM method and the content encrypted with the DRM method. Also, the terminal device 100 can request the license management server device 200 to modify the stored license.

Here, the terminal device 100 may be implemented using various devices such as a smart phone, a tablet computer, a notebook computer, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and the like.

The license management server apparatus 200 may provide a license management page for license modification. Also, the license management server apparatus 200 can process the license modification according to the license modification request from the terminal device 100. [

Here, the license management server device 200 may be a license issuing server device that issued a license requested by the terminal device 100. In this case, the license management server device 200 performs all functions of license issuance and management . Alternatively, the license management server apparatus 200 may be implemented as a separate server apparatus from the license issuing server apparatus. In this case, the license management server 200 can perform only the license management function issued by the license issuing server .

The DB connected to the license management server apparatus 200 can store the purchase history of content encrypted by the DRM method purchased by the user with the terminal device unique identification information or the user unique identification information. Here, the DB may be implemented in the form of a storage unit in the license management server 200, or may be implemented as a separate DB connected to the license management server 200. [

 Hereinafter, the mutual operation of the terminal device 100 and the license management server device 200 included in the system 1000 will be described in detail with reference to FIGS.

FIG. 2 is a flowchart illustrating a method of modifying a device binding license corresponding to content encrypted according to an embodiment of the present invention. Referring to FIG. Here, FIG. 2 differs from FIG. 3 in that the license requested for modification is a device-bound license.

Referring to FIG. 2, the terminal device 100 may request the license management server 200 to modify the license (S201). Concretely, the user of the terminal device 100 executes the license modification program stored in the terminal device 100 or inputs the web address of the license management server device 200 in the terminal device 100, And can be connected to the device 200. In this case, the license management server apparatus 200 can provide a license management page for displaying a screen for inputting a login, a license modification, a license modification range and the like, and the user can modify the license in the above- Can be requested.

Here, the license modification request may include a license to be modified, content information corresponding to a license to be modified, and terminal device unique identification information.

The terminal unique identification information may be information such as a MAC address and a telephone number of the terminal apparatus that can identify the terminal apparatus to other terminal apparatuses.

The license to be modified may be a device binding license, and the device binding license may mean a license bound to the above-described terminal device unique identification information.

The license management server apparatus 200 compares the license information included in the received license modification request with content information to be modified, information unique to the terminal device, and information stored in the DB, It can be determined whether or not the registered terminal device has purchased the content corresponding to the license (S202).

If the terminal device 100 that requested the modification of the license is the registered terminal device (Y in S203), the license management server device 200 can transmit a response indicating that the license modification is possible to the terminal device 100 that requested the modification of the license (S204).

Then, the terminal device 100 requesting modification of the license can transfer the license modification range to the license management server 200 (S205). Here, the license modification range can be received from the license management page provided when the terminal device 100 that requested the modification of the license accesses the license management server 200.

On the other hand, in accordance with the license modification range input from the user, the license management server apparatus 200 determines whether to remove all the usage rights of the license to be modified provided from the terminal device 100 that has requested the modification of the license, (S206). For example, when the total number of reproducible times of licenses corresponding to movie contents encrypted by the DRM method is 10, it is possible to judge whether to delete all ten usage rights or only three times.

If all the usage rights of the license to be modified are removed (S206: Y), the license management server apparatus 200 can generate a first license from which the device binding element is removed from the license to be modified (S207). The difference here is that the license you are trying to modify is a device binding license or that the generated first license is a license that removes the device binding element. Thus, a first license with all the usage rights and the device binding element removed can be generated.

If the license management server apparatus 200 deletes only some of the usage rights (S206: N), the license management server apparatus 200 deletes some of the usage rights from the second license having the device binding element, You can create a third license that removes the binding elements.

On the other hand, the license management server apparatus 200 can transmit the created license to the license modification request terminal device 100 (S209).

Then, the license modification request terminal device 100 can store the generated license transmitted from the license management server 200 (S210).

The generated first license and the generated third license do not have a device binding element and can not be used in the terminal device 100 that requested the license modification unless the device binding is performed again. Can be used. For example, the terminal device 100 requesting modification of the license may transmit the created first and third licenses to a license transaction server or another license management server that performs the function of the used license transaction market to transfer the license to another person. On the other hand, the first and third licenses transferred to another person are bound to the unique identification information of the terminal device of the other person who has acquired the first and third licenses or to the user-specific information of the other person by the license transaction server or another license management server And can be used in other terminal devices.

Also, the generated second license can be used in the terminal device 100 which has requested the modification of the license since some usage rights have been removed but it has a device binding element.

3 is a flowchart illustrating a method for modifying a user binding binding license corresponding to content encrypted according to the DRM scheme according to an embodiment of the present invention. Here, FIG. 3 differs from FIG. 2 in that the modification requested license is a user binding.

Referring to FIG. 3, the terminal device 100 may request the license management server 200 to modify the license (S301).

Here, the license modification request may include a license to be modified, content information corresponding to a license to be modified, and user unique identification information. Here, the user's unique identification information may be information capable of identifying a user, such as a resident registration number, a login ID, etc., from other users.

The license to be modified may be a user binding license, and the user binding license may mean a license bound to the above-described user unique identification information. That is, the user may have a license having a usage right that can be used in a plurality of terminal devices such as a smart phone, a tablet computer, a PDA (Personal Digital Assistants), etc. In this case, the license may be a user binding license .

Then, the license management server apparatus 200 compares the license included in the received license modification request with the content information to be modified, information unique to the user, and information stored in the DB, and obtains the license requested by the user of the terminal device 100, (Step S302). In step S302, it is determined whether the registered terminal device is a registered terminal device.

If the user of the terminal device 100 requested to modify the license is a registered user (Y in S303), the license management server device 200 can transmit a response indicating that the license modification is possible to the terminal device 100 that requested the license modification (S304).

Then, the terminal device 100 requesting the modification of the license can transfer the license modification range to the license management server 200 (S305). Here, the license modification range can be received from the license management page provided when the terminal device 100 that requested the modification of the license accesses the license management server 200.

On the other hand, in accordance with the license modification range inputted by the user, the license management server apparatus 200 deletes all the usage rights of the license to be modified provided from the terminal device 100 requesting the license modification, or removes only a part of the usage rights (S306). 2, in the case of a license having a usable right for use in both a smart phone, a tablet computer, and a PDA, it is possible to judge whether to remove the usage right for all the devices or to remove only a part thereof.

If all the usage rights of the license to be modified are removed (S306: Y), the license management server apparatus 200 may generate a fourth license in which the user binding element is removed from the license to be modified (S307). The license to be modified here differs from the user binding license in that the generated fourth license is a license in which the user binding element is removed. Thus, a fourth license with all user rights and with the user binding element removed can be generated.

If only some of the usage rights are removed (S306: N), the license management server device 200 can delete some of the usage rights from the fifth and fifth licenses with the user binding element removed, You can create a sixth license that removes the binding elements.

Meanwhile, the license management server apparatus 200 can transmit the created license to the license modification request terminal device 100 (S309).

Then, the license modification request terminal device 100 can store the generated license transferred from the license management server device 200 (S310).

Meanwhile, the fourth license generated here and the generated sixth license do not have a user binding element, so that they can not be used in the terminal device 100 of the user who has requested modification of the license unless another user binding is performed, It can be used for transfer. For example, the terminal device 100 requesting modification of the license may transmit the created first and third licenses to a license transaction server or another license management server that performs the function of the used license transaction market to transfer the license to another person. On the other hand, the first and third licenses transferred to another person are bound to the unique identification information of the terminal device of the other person who has acquired the first and third licenses or to the user-specific information of the other person by the license transaction server or another license management server And can be used in other terminal devices.

In addition, the generated second license can be used in the terminal device 100 of the user who has requested the modification of the license, even though some usage rights have been removed but have a user binding element.

Meanwhile, the communication between the terminal device 100 and the license management server 200 that requested the modification of the license in FIGS. 2 to 3 may be performed using a secure channel formed to enable secure mutual communication. Here, the secure channel may be formed using a Public Key Infrastructure (PKI) scheme between the terminal device 100 and the license management server device 200 requesting modification of the license, The communication data between the server apparatuses 200 can be protected. Also, the newly generated license can be digitally signed by the license management server device 200. [

4 is a diagram illustrating a license management server apparatus for modifying a user binding corresponding to content encrypted with a DRM scheme according to an embodiment of the present invention. 4, the license management server apparatus 200 includes all or a part of the communication unit 210, the storage unit 220, and the control unit 230.

The communication unit 210 enables communication between the license server apparatus 200 and the external apparatus.

Here, the communication unit 210 may be connected in a wireless or wired manner via a local area network (LAN) and an Internet network, a form connected through a USB (Universal Serial Bus) port, a mobile communication network Or a short-range wireless communication method such as NFC (Near Field Communication), Radio Frequency Identification (RFID), Wi-Fi, or the like.

The storage unit 220 functions to store various programs and data necessary for driving the license server apparatus 200. In particular, the storage unit 220 may store the purchasing history of content encrypted by the DRM method purchased by the user with the terminal device unique identification information or the user unique identification information.

Herein, the storage unit 220 may be implemented as a random access memory (RAM), a flash memory, a ROM, an erasable programmable ROM (EPROM), an electronically erasable and programmable ROM (EEPROM), a register, a hard disk, Card, or the like, as well as a detachable type storage device such as a USB memory, a CD-ROM, or the like.

The control unit 230 controls the overall operation of the license management server apparatus 200. Specifically, the control unit 230 can control all or a part of the communication unit 210 and the storage unit 220. Here, the control unit 230 may include all or part of the license modification module 231 and the license management page provision module 232.

The license management page providing module 232 of the control unit 230 can provide the license management page to the terminal device 100 when the terminal device 100 approaches the license management server device 200. [

The control unit 230 may determine whether the terminal device 100 is a registered device or a registered user of the terminal device 100 when a license modification request is received from the terminal device 100. [ If it is a registered device or a registered user, the control unit 230 may control the communication unit 210 to transmit a response indicating that the license modification is possible to the terminal device 100 requesting modification of the license.

In accordance with the license modification range input by the user, the license modification module 231 of the control unit 230 determines whether to remove all usage rights of the license to be modified provided from the terminal device 100 that requested the license modification, It is possible to judge whether or not to remove only a part.

The license modification module 231 of the control unit 230 can generate a modified license using the determination result.

Also, the control unit 230 can control the communication unit 210 to transmit the generated license to the terminal device 100 that requested the license modification.

Meanwhile, the method according to various embodiments of the present invention described above may be implemented in program code and provided to each server or devices in a state stored in various non-transitory computer readable media.

A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

100: Terminal device 200: Licensor management server device
210: communication unit 220:
230:

Claims (6)

A license modification method corresponding to content encrypted with a DRM method of a license management server apparatus,
Receiving a modification request for the first license from a terminal device having a first license to modify the usage right;
Modifying a binding element binding the first license according to the received modification request to generate a new license; And
And transmitting the generated new license to the terminal device. The method according to claim 1,
Wherein the binding element comprises:
The unique identification information of the terminal device or the unique identification information of the user to the terminal device,
The modification request,
The content information corresponding to the first license, the content information corresponding to the first license, and the modification range of the usage right for the first license. 3. The method of claim 2,
Wherein the generating comprises:
Generating a second license from which the binding element binding the first license is removed if the modification range is a range for removing all usage rights for the first license,
A third license having a binding element that removes some usage rights of the first license and binds the first license when the modification range is a range that removes some usage rights for the first license, To generate a fourth license with some usage rights removed from the binding element removed from the first license. A license management server apparatus for modifying a license corresponding to content encrypted by a DRM method,
A communication unit for receiving a modification request for the first license from a terminal apparatus having a first license for which a use right is to be modified; And
And a controller for modifying a binding element binding the first license according to the received modification request to generate a new license and to control the communication unit to transmit the generated new license to the terminal device, Server device. 5. The method of claim 4,
Wherein the binding element comprises:
The unique identification information of the terminal device or the unique identification information of the user to the terminal device,
The modification request,
The content information corresponding to the first license, the content information corresponding to the first license, and the modification range of the usage right for the first license. 6. The method of claim 5,
Wherein,
Generating a second license from which the binding element binding the first license is removed if the modification range is a range for removing all usage rights for the first license,
A third license having a binding element that removes some usage rights of the first license and binds the first license when the modification range is a range that removes some usage rights for the first license, And generates a fourth license in which the binding element has been removed with some use authority removed from the license management server apparatus.
KR1020130048356A 2013-04-30 2013-04-30 Server apparatus and method for modifying license corresponding to encrypted contents applied drm KR20140130292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130048356A KR20140130292A (en) 2013-04-30 2013-04-30 Server apparatus and method for modifying license corresponding to encrypted contents applied drm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130048356A KR20140130292A (en) 2013-04-30 2013-04-30 Server apparatus and method for modifying license corresponding to encrypted contents applied drm

Publications (1)

Publication Number Publication Date
KR20140130292A true KR20140130292A (en) 2014-11-10

Family

ID=52452258

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130048356A KR20140130292A (en) 2013-04-30 2013-04-30 Server apparatus and method for modifying license corresponding to encrypted contents applied drm

Country Status (1)

Country Link
KR (1) KR20140130292A (en)

Similar Documents

Publication Publication Date Title
KR101135145B1 (en) Secure Multimedia Card, Rights object issue method and apparatus for using digital contents
CN102024128B (en) For equipment and the method for digital copyright management
CN102073826B (en) Utilize the system and method for the digital copyright management of lightweight digital watermark adding component
CN101014944A (en) Method and apparatus for digital rights management
CN101681405B (en) Digital rights management method and apparatus
CN100555205C (en) Portable memory and in portable memory the method for management document
US20140325676A1 (en) Method and system for digital contents lending
KR20140130300A (en) Sns server apparatus and method for transacting contents
KR20140130292A (en) Server apparatus and method for modifying license corresponding to encrypted contents applied drm
KR20140129671A (en) Apparatus and method for providing drm service based on cloud
KR20140130293A (en) Terminal apparatus and method for adjusting use right of contents applied drm
JP4981821B2 (en) Method and device for roaming and using DRM content on a device
KR20140129676A (en) Terminal apparatus and method for taking action on error related drm
KR20140130283A (en) Terminal apparatus and method for using encrypted multimedia contents applied drm
JP6463337B2 (en) Remote installation of digital content
KR101561771B1 (en) The software license authentication apparatus and the method of using the portable terminal
KR20120002079A (en) System for protecting copyright of application, apparatus and method for protecting copyright of application, and terminal device and method for protecting copyright of application of the terminal device
KR20140129666A (en) Server apparatus and method for transacting license corresponding to encrypted contents applied drm
KR20140130298A (en) Terminal apparatus, advertisement management server and method for distributing contents inserted advertisement contents
KR20140130304A (en) Contents market server and method for providing contents
KR20140129689A (en) License menagement server and method for managing license corresponding to contents applied drm
KR20140130290A (en) Contents providing apparatus and method for providing contents applied drm
KR20140129734A (en) Contents providing server and method for providing drm contents
KR20140127124A (en) Electronic device for managing access to system resource
KR101262010B1 (en) Method of domain seting-up for Digital Rights Management system

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination