WO2012150727A1 - 특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 - Google Patents
특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000004044 response Effects 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 11
- 230000006870 function Effects 0.000 description 63
- 238000005516 engineering process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
Definitions
- the present invention relates to digital rights management (DRM), and more particularly, to an apparatus and a method for supporting a DRM function in a user device.
- DRM digital rights management
- Digital Rights Management is a technology that continually manages and protects the rights to intellectual property of digital content using encryption technology. That is, it is a technology for safely delivering various contents to a user from a content provider (CP), and preventing the user from illegally distributing the contents.
- This DRM technology protects information throughout the entire process of creating, distributing, using and disposing of digital content, and protects the use and rights of users according to their rights online as well as offline.
- DRM content content to which the DRM technology is applied
- the user device In order to use the content to which the DRM technology is applied (hereinafter, “DRM content”) on the user device, the user device must be equipped with a DRM function.
- One of the important requirements for downloadable DRM systems is that the software being downloaded must be up-to-date in order to ensure high security. If the device is performing an inappropriate version of the DRM function, it may be desirable for the content provider or service provider to be able to restrict or prohibit DRM content playback. To do this, the device must be able to download and install a new version of the DRM feature.
- DRM standards such as Open Mobile Alliance (OMA) DRM and Marlin DRM have not been enacted to provide a version of a DRM function suitable for playing such DRM contents. Therefore, when a version of a specific DRM function is required for a specific DRM content, it is necessary to prepare a countermeasure.
- OMA Open Mobile Alliance
- the present invention provides an apparatus and method for providing a DRM function corresponding to specific content to a user device.
- the present invention also provides an apparatus and method for allowing a user device to upgrade the DRM function.
- a digital rights management (DRM) function corresponding to a specific content in a user device, the method comprising: acquiring a rights object for a content; Determining requirements for content playback; determining whether a valid DRM function is present in the user device based on the requirements; and if the valid DRM function is absent, It includes the process of downloading a new DRM function.
- DRM digital rights management
- the present invention in a user device provided with a digital rights management (DRM) function corresponding to a specific content, obtains a rights object for the content, and determines the requirements for playing the content included in the rights object
- DRM digital rights management
- a DRM controller that determines whether a valid DRM function is present in the user device based on the requirements, and provides download information of the valid DRM function when the valid DRM function is absent, and the valid DRM function
- a download agent for downloading a new DRM function corresponding to the content based on the download information of the.
- the DRM function installed in the user device may be changed. And new DRM functionality can be added to user devices.
- a DRM function required when a specific content requires a specific DRM function or a newer version of a specific DRM function can be installed in a user device.
- FIG. 1 is a flowchart of a method for obtaining a rights object used in the present invention
- FIG. 2 is a structural diagram of a rights object obtained through the process of FIG. 1;
- FIG. 3 is an internal block diagram of a user device according to an embodiment of the present invention.
- FIG. 4 is a structural diagram of a rights object according to an embodiment of the present invention.
- FIG. 5 is a structural diagram of a rights object according to another embodiment of the present invention.
- FIG. 6 is an operational flow diagram for obtaining a rights object according to an embodiment of the invention.
- the present invention proposes a method for acquiring a DRM function for reproducing digital right management (DRM) content in a user device as needed.
- DRM digital right management
- the present invention obtains a rights object corresponding to the request, and uses the rights object to obtain information on the current DRM function. If a new DRM function is required, a new DRM function is installed or an existing DRM function is upgraded.
- the service system can restrict playback of specific DRM contents by allowing a user device to directly acquire a specific DRM function even if the service system does not have the information of the DRM functions for all the user devices.
- the user device can obtain the latest DRM function required to play specific DRM content.
- the user device is any portable terminal, a computer, a personal digital assistant (PDA), an MP3 player, a portable device that can play with a rights object (for example, a right to use a music file or a video file).
- PDA personal digital assistant
- MP3 player a portable device that can play with a rights object (for example, a right to use a music file or a video file).
- Multimedia Palyer PSP (PlayStation Portable) and the like.
- the user device 100 accesses a system for providing corresponding DRM content and transmits a message for requesting the DRM content.
- the content server transmits the DRM-applied content, that is, the DRM content to the user device 100.
- the application of DRM means that content is encrypted using an encryption key and an encryption format defined in DRM, and usage restriction information for the content is recorded according to a format defined in DRM.
- the user device 100 In order to play such DRM content, the user device 100 must acquire a specific license, called a Rights Object, for the DRM content.
- the license is data of contents that specify the decryption key used to decrypt the encrypted DRM content and the access authority (eg, the number and duration) of the content.
- the user device 100 transmits a rights object request (RO Request) message to the rights issuer (RI) 110 using a 2-Pass Rights Object Acquisition Protocol (ROAP) in step 120.
- ROAP 2-Pass Rights Object Acquisition Protocol
- a license is obtained by receiving a rights object response (RO Response) message from the rights issuing server 110. If the DRM content and the license are both stored through the above process, the user device 100 can use the corresponding DRM content.
- This rights object request message includes an identifier of the requested rights object and security parameters for verifying the rights object request message.
- the rights object response message includes a protected rights object (Protected RO) and other parameters as shown in Table 1 below.
- the rights object response message includes a "Protected RO" of each DRM content, and includes status, device ID, rights issuing server ID, and device nonnce. ), At least one of parameters such as a certification chain, an online certificate status protocol response, an extension, a signature, and the like.
- OMA DRM the messages of the protocol defined in OMA DRM are encoded in XML.
- the OMA DRM specification defines "Protected RO” as a structure used to protect an actual rights object, the structure of which is shown in FIG.
- the rights object response message includes a portion 200 and a rights object definition portion 210 indicating that "Protected RO" is included.
- an embodiment of the present invention proposes a method for the rights issuing server 110 to provide DRM information such as DRM system requirements and related meta information using 1-Pass ROAP or 2-Pass ROAP.
- the DRM information provided from the rights issuing server 110 includes information for installing a DRM client necessary for consuming content in the user device 100.
- the user device 100 determines whether the DRM function is downloaded by checking whether the DRM function is required for the DRM content, the version of the DRM function required for the DRM content, and the like. It becomes possible. The configuration and operation of the user device 100 will be described with reference to FIG. 3.
- the user device 100 includes a DRM controller 310, a DRM client 320, a communication unit 330, a memory 340, a user input unit 350, a display unit 360, and a download agent 370. It includes.
- the communication unit 330 transmits and receives a message or data with a network or other devices, and transmits the received message or data to the DRM controller 310 or the DRM client 320. For example, the communication unit 330 transmits a rights object request message or receives a rights object response message.
- the user input unit 350 is a component that provides an interface between the user and the user device 100 and transmits data input from the user to the DRM controller 310.
- the memory 340 stores a program for processing and controlling the DRM controller 310, reference data, various kinds of updatable storage data, and the like, and is provided as a working memory of the DRM controller 310.
- the display unit 360 displays various data and DRM contents under the control of the DRM controller 310.
- the download agent 370 performs an operation of downloading the DRM function necessary to play the DRM content.
- the download agent 370 obtains information on a specific DRM function to download, and downloads a new DRM function based on the obtained DRM information. For example, the download agent 370 downloads the DRM function by connecting to the server using the address of the server providing the DRM function.
- the DRM controller 310 receives a new DRM function from the download agent 370 and installs it or upgrades an existing DRM function.
- the DRM client 320 may be installed in the user device 100.
- the DRM controller 310 obtains the rights object RO from the rights object response message, and parses the rights to determine requirements related to playing DRM content.
- the DRM controller 310 determines whether there is a currently valid DRM system version for the DRM content to be played. For example, the DRM controller 310 determines whether a DRM system version corresponding to the DRM system version specified in the rights object exists in the user device 100.
- DRM system version If it is a valid DRM system version, rights parsing continues. In contrast, if it is not a valid DRM system version, it is determined whether the DRM function of the DRM system version specified in the rights object is downloadable. If the download is possible, the download agent 380 provides information about a specific DRM function to be downloaded.
- the DRM client 320 is a logical component that controls an operation for applying a DRM function when executing DRM content. Accordingly, the DRM client 320 controls to execute the DRM content by using information on the content access authority related to the specific DRM content. Information about the content access right can be obtained from the rights object response message.
- the DRM controller 310 and the DRM client 320 may be combined to configure a DRM agent in the DRM of the OMA.
- the DRM Agent downloads and parses the rights object (RO) to identify the requirements related to DRM content playback. Then, the DRM content is played back according to the requirements.
- RO rights object
- the DRM client 320 may not be mounted in the user device 100 according to the type of the user device 100.
- the download agent 370 generates a DRM client by downloading a DRM function related to the DRM content to be played.
- the relevant DRM function should be installed whenever necessary, and the download of the DRM function is performed by the download agent 370, and the installation of the downloaded DRM function is performed by the DRM.
- the user device 100 based on the DRM information provided from the rights issuing server 110, for example, the version information of the DRM function, the DRM function required for the DRM content based on the address information to download the DRM function. It is possible to determine whether the installation of. By doing so, the user device 100 can install an optimal DRM function corresponding to each DRM content.
- the service system may control the user device 100 to directly acquire the specific DRM function or limit the playback of the specific DRM content even if the service system does not have the information of the DRM function for all the user devices.
- the user device 100 does not need to provide information on the installed DRM function even if the installation of the DRM function is completed.
- both the service system and the user device 100 can manage convenient DRM functions.
- an embodiment of the present invention proposes the following rights object structure.
- OMA DRM technology has defined a technical specification called Right Expression Language (REL) to express a rights object (RO), and the present invention proposes the following rights object structure using the REL.
- REL Right Expression Language
- RO rights object
- the general content described in the REL will be omitted, but the content of the REL omitted in the present invention is in accordance with the OMA DRM REL standard, and only the content related to the present invention will be described.
- DRM information that can play specific DRM content is provided.
- the DRM information is included in the rights object response message and transmitted, and the attribute positions including the DRM information in the rights object response message are shown in Table 2 below.
- the DRM information is included in the "Protected RO", and the DRM information means an address from which the DRM can be downloaded.
- the user device may use the attribute to find a server that provides a download and installation service for the OMA DRM system.
- User devices will also be able to check for updates or obtain OMA DRM distribution information for download.
- the structure of encoding the rights object response message as shown in Table 2 in XML is shown in FIG. 3.
- the DRM information is inserted into the rights object definition portion 400 in the form of "downloadableDrmURL" 410.
- the present invention defines requirements for DRM system version information that the user device 100 should use in the rights object. Until the requirements defined in the rights object are satisfied, the DRM controller 310 should not proceed with content playback. In order to satisfy this requirement, the DRM controller 310 accesses an address corresponding to the "downloadableDrmURL" to download, install, and upgrade a new DRM function.
- the DRM controller 310 must comply with the requirements.
- the requirements for playing the DRM content are included in the right part in the right object as shown in FIG. 5.
- the REL in OMA DRM divides the XML components into several models. For example, referring to FIG. 5, in the case of the permission model 500, the permission model 500 indicates a permission to use content, and has ⁇ play> as an element, and the ⁇ play> indicates a permission to play related content. .
- the requirement model 510 also includes conditions that must be met before the permission model is performed.
- the present invention proposes a structure in which a new element ⁇ system-version> is added to the requirement model by extending the requirement model defined in the REL.
- An example of "system-version" by extending the REL requirement model may be represented as in Tables 1 to 3 below.
- Table 3 shows "ELEMENT ⁇ requirements>" and newly defines a requirement of REL for "system-version” proposed in the present invention. This requirement consists of a new element, system-version, as shown in Table 4 below.
- Table 4 shows "ELEMENT ⁇ system-version>", and "system-version” refers to the DRM system version that must be installed in the user device 100 in order to play DRM content.
- the version of the specific DRM function required for playing the specific DRM content is defined as "system-version”.
- the DRM system version shown in Rights of FIG. 5 Even if a DRM system of a newer version than the DRM system version shown in Rights of FIG. 5 is installed, if the user device 100 includes information to ignore the current version, the DRM system shown in the right. Even if the version is lower than the current version, the DRM system version indicated in the right must be installed.
- RELs are used to illustrate rights including elements newly proposed in the present invention. 5 illustrates what is described in Tables 1 to 3 using a method called REL.
- the ⁇ system-version> of the ⁇ requirement> associated with the ⁇ play> forces the use of the OMA DRM 2.2.1 version.
- the "system-override" is set to false means that the DRM content can be played in the new version (e.g., 2.2.2).
- FIG. 6 illustrates an operation flow in the user device 100 for obtaining a rights object according to an embodiment of the present invention.
- the DRM controller 310 of the user device 100 obtains a rights object from the rights issue server 110 in step 600. As the user wants to play the DRM content, the DRM controller 310 verifies the rights object in step 605 and starts parsing the rights to perform the analysis. Accordingly, the DRM controller 310 determines the requirements related to the playback of the DRM content in step 610.
- the DRM controller 310 determines that there is a ⁇ system-version> for the DRM system version while determining the requirements related to playback. In step 615, it is determined whether a valid DRM system version. In detail, the DRM controller 310 determines whether the currently installed DRM function satisfies the requirements based on the information displayed in the ⁇ system-version>. If the currently installed DRM system version satisfies the above requirements, that is, if it is a valid DRM system version, the DRM controller 310 proceeds to step 630.
- the DRM controller 310 proceeds to step 620 to determine whether the required DRM system version is downloadable. To this end, the DRM controller 310 checks whether the required DRM system version is downloadable using "downloadableDrmURL" in the rights object response message. If the download is not possible, the user cannot play the DRM content.
- the DRM controller 310 downloads the new DRM system in step 625 through the download agent 370 to perform installation or upgrade. The process then proceeds to step 605 to perform the above-described process.
- the DRM controller 310 may perform an operation of downloading and installing a new DRM system, there may be a separate module for downloading and installing the DRM system in the user device 100 as in the download agent 310. have.
- the DRM controller 310 continues to parse and interpret the right parsing in step 630. If the right interpretation is successful in step 635, that is, all the requirements of the right are satisfied, the DRM controller 310 proceeds to step 640 to allow the DRM content to be played. Accordingly, the DRM content can be played through the DRM function suitable for the specific DRM content. In contrast, if the requirements are not satisfied, the user cannot play DRM content.
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Abstract
Description
Claims (14)
- 사용자 디바이스에서 특정 컨텐츠에 대응하는 DRM(Digital Rights Management) 기능을 제공받는 방법에 있어서,컨텐츠에 대한 권리 객체를 획득하는 과정과,상기 권리 객체에 포함된 상기 컨텐츠 재생에 대한 요구 사항들을 판단하는 과정과,상기 요구 사항들을 근거로 상기 컨텐츠에 대응하여 유효한 DRM 기능이 상기 사용자 디바이스에 있는지를 판단하는 과정과,상기 유효한 DRM 기능이 없는 경우 상기 컨텐츠에 대응하는 새로운 DRM 기능을 다운로드하는 과정을 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제1항에 있어서, 상기 유효한 DRM 기능이 상기 사용자 디바이스에 있는지를 판단하는 과정은,상기 요구 사항에 포함된 DRM 기능의 버전과 일치하는 DRM 기능이 있는지를 판단하는 과정임을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제2항에 있어서, 상기 다운로드하는 과정은,상기 요구 사항에 상기 사용자 디바이스에 있는 DRM 기능의 버전을 무시하라는 정보가 포함되어 있는지를 판단하는 과정과,상기 사용자 디바이스에 있는 DRM 기능의 버전을 무시하라는 정보가 포함되어 있는 경우 상기 요구 사항에 포함된 DRM 기능의 버전에 해당하는 DRM 기능을 다운로드하는 과정을 더 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제1항에 있어서, 상기 다운로드하는 과정은,상기 요구 사항에 포함된 다운로드 주소 정보를 이용하여 상기 새로운 DRM 기능을 다운로드하는 과정임을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제1항에 있어서, 상기 다운로드한 새로운 DRM 기능을 설치하거나 상기 다운로드한 새로운 DRM 기능을 이용하여 기존의 DRM 기능을 업그레이드하는 과정을 더 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제1항에 있어서, 상기 요구 사항들은,상기 컨텐츠에 대응하여 유효한 DRM 기능의 버전, 상기 사용자 디바이스에 있는 DRM 기능의 버전 무시 여부 및 상기 컨텐츠에 대응하는 유효한 DRM 기능을 다운로드받을 주소 정보 중 적어도 하나를 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 제1항에 있어서,상기 유효한 DRM 기능이 없는 경우 상기 컨텐츠에 대응하여 유효한 DRM 기능의 다운로드가 가능한지를 판단하는 과정을 더 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 방법.
- 특정 컨텐츠에 대응하는 DRM(Digital Rights Management) 기능을 제공받는 사용자 디바이스에 있어서,컨텐츠에 대한 권리 객체를 획득하고, 상기 권리 객체에 포함된 상기 컨텐츠 재생에 대한 요구 사항들을 판단하고, 상기 요구 사항들을 근거로 상기 컨텐츠에 대응하여 유효한 DRM 기능이 상기 사용자 디바이스에 있는지를 판단하고, 상기 유효한 DRM 기능이 없는 경우 상기 유효한 DRM 기능의 다운로드 정보를 제공하는 DRM 컨트롤러와,상기 유효한 DRM 기능의 다운로드 정보를 근거로 상기 컨텐츠에 대응하는 새로운 DRM 기능을 다운로드하는 다운로드 에이전트를 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제8항에 있어서, 상기 요구 사항들은,상기 컨텐츠에 대응하여 유효한 DRM 기능의 버전, 상기 사용자 디바이스에 있는 DRM 기능의 버전 무시 여부 및 상기 컨텐츠에 대응하는 유효한 DRM 기능을 다운로드받을 주소 정보 중 적어도 하나를 포함함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제9항에 있어서, 상기 DRM 컨트롤러는,상기 컨텐츠에 대응하여 유효한 DRM 기능의 버전과 일치하는 DRM 기능이 설치되어 있는지를 판단함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제9항에 있어서, 상기 DRM 컨트롤러는,상기 요구 사항에 상기 사용자 디바이스에 있는 DRM 기능의 버전을 무시하라는 정보가 포함되어 있는지를 판단하고, 상기 사용자 디바이스에 있는 DRM 기능의 버전을 무시하라는 정보가 포함되어 있는 경우 상기 다운로드 에이전트를 통해 상기 요구 사항에 포함된 DRM 기능의 버전에 해당하는 DRM 기능을 다운로드함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제9항에 있어서, 상기 다운로드 에이전트는,상기 컨텐츠에 대응하는 유효한 DRM 기능을 다운로드받을 주소 정보를 이용하여 상기 새로운 DRM 기능을 다운로드함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제8항에 있어서, 상기 DRM 컨트롤러는,상기 다운로드한 새로운 DRM 기능을 설치하거나 상기 다운로드한 새로운 DRM 기능을 이용하여 기존의 DRM 기능을 업그레이드함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
- 제8항에 있어서, 상기 DRM 컨트롤러는,상기 유효한 DRM 기능이 없는 경우 상기 컨텐츠에 대응하여 유효한 DRM 기능의 다운로드가 가능한지를 판단하고, 상기 다운로드가 가능한 경우 상기 유효한 DRM 기능의 다운로드 정보를 제공함을 특징으로 하는 특정 컨텐츠에 대응하는 DRM 기능을 제공받는 사용자 디바이스.
Priority Applications (3)
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KR1020137030826A KR20140043077A (ko) | 2011-05-03 | 2011-05-03 | 특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 |
PCT/KR2011/003283 WO2012150727A1 (ko) | 2011-05-03 | 2011-05-03 | 특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 |
US14/115,329 US20140157438A1 (en) | 2011-05-03 | 2011-05-03 | User device and method for receiving drm function corresponding to specific contents |
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PCT/KR2011/003283 WO2012150727A1 (ko) | 2011-05-03 | 2011-05-03 | 특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 |
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PCT/KR2011/003283 WO2012150727A1 (ko) | 2011-05-03 | 2011-05-03 | 특정 컨텐츠에 대응하는 drm 기능을 제공받기 위한 사용자 디바이스 및 방법 |
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US (1) | US20140157438A1 (ko) |
KR (1) | KR20140043077A (ko) |
WO (1) | WO2012150727A1 (ko) |
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US9383989B1 (en) | 2014-06-16 | 2016-07-05 | Symantec Corporation | Systems and methods for updating applications |
US9767324B2 (en) | 2014-11-22 | 2017-09-19 | Intel Corporation | Transparent execution of secret content |
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KR20070099493A (ko) * | 2006-07-21 | 2007-10-09 | (주)잉카엔트웍스 | Drm이 적용된 컨텐츠를 저장 및 사용하기 위한 포터블저장매체 그리고 이를 구현하기 위한 방법 및 시스템 |
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KR100692589B1 (ko) * | 2005-01-06 | 2007-03-13 | 삼성전자주식회사 | Drm 시스템에 적용되는 컨텐츠 재생장치 및 방법그리고 모바일코드 제공장치 및 방법 |
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KR101012006B1 (ko) * | 2008-07-22 | 2011-02-08 | 삼성전자주식회사 | 이동통신 시스템에서 디알엠을 이용한 미들렛 수트 관리를위한 장치 및 방법 |
-
2011
- 2011-05-03 KR KR1020137030826A patent/KR20140043077A/ko not_active Application Discontinuation
- 2011-05-03 US US14/115,329 patent/US20140157438A1/en not_active Abandoned
- 2011-05-03 WO PCT/KR2011/003283 patent/WO2012150727A1/ko active Application Filing
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KR20070099493A (ko) * | 2006-07-21 | 2007-10-09 | (주)잉카엔트웍스 | Drm이 적용된 컨텐츠를 저장 및 사용하기 위한 포터블저장매체 그리고 이를 구현하기 위한 방법 및 시스템 |
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US20140157438A1 (en) | 2014-06-05 |
KR20140043077A (ko) | 2014-04-08 |
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