KR101120688B1 - Method and device for delivering drm content between two drm-enabled device - Google Patents

Abstract

The present invention relates to a method for delivering digital rights management (DRM) content between devices, and an apparatus for delivering the same. The present invention relates to a device capable of using DRM content when a device transmits DRM content between devices. Even if the hardware specification or software specification is different, the DRM content is received by using the programs after receiving the programs necessary to download and use the DRM content from the content issuer directly to the user's ability to operate the content. You can download and use it.

Digital Copyright, DRM, Rights, Content Issuer

Description

METHOD AND DEVICE FOR DELIVERING DRM CONTENT BETWEEN TWO DRM-ENABLED DEVICE}

1 is a block diagram of a general DRM system.

2 is a block diagram of a digital rights management (DRM) system according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a procedure of delivering DRM content when device usage is the same according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a procedure of delivering DRM content when device usage differs between devices according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating a procedure for delivering DRM content when device-to-device usage is the same according to the second embodiment of the present invention.

FIG. 6 is a diagram illustrating a procedure for delivering DRM content when device usage differs between devices according to a second embodiment of the present invention.

7 is a schematic block diagram of an apparatus (terminal) according to the invention.

******* Description of the symbols for the main parts of the drawing ********

10: device 1 20: device 2

30: Rights Issuer (RI)

40: Content Issuer

100: device (terminal)

The present invention relates to digital rights management (DRM), and more particularly, to a method for delivering digital rights management (DRM) content between devices and an apparatus for delivering the same.

In general, digital rights management (DRM) is a technology to securely and systematically manage the rights of digital content (Rights Object: RO), to prevent illegal copying of content and to acquire the right to use content. It provides a set of protection and management mechanisms for the creation, distribution, and use of the product.

1 is a block diagram of a general DRM system.

As shown in FIG. 1, the DRM system controls the content provider to use the content transmitted to the user only as much as the user right granted to the user. Here, the content provider is an entity corresponding to a content issuer (CI) and / or a right issuer (RI).

The content issuer (CI) issues protected content (hereinafter referred to as DRM content) using a specific encryption key to protect the content from users who do not have access rights, and the rights issuer (RI) Issue the right to use DRM content.

The DRM agent is mounted on the terminal, receives the content and the right from the content issuer and the right issuer, respectively, and interprets the permissions and / or constraints included in the right to use the content on the device. To control. That is, the terminal may use the DRM content under the permission or restriction of the right of use held by the terminal.

In addition to this conventional DRM technology, the implementation of the following new technology is required.

When the DRM content is delivered between devices, even if the usage ability between the transmitting device and the receiving device (collectively, the hardware or software specification of the device that can use the digital content) is different, the receiving device can use its own ability from the content issuer. There is a need for a technical method to receive and use DRM content suitable for.

Accordingly, an object of the present invention is to match the user's ability to use the content directly from the content issuer directly at the receiving device even when the usage ability according to hardware or software specifications between the transmitting device and the receiving device is different. The DRM content can be downloaded and used.

In order to achieve the above object, the device-to-device DRM content delivery method according to the present invention comprises the steps of receiving a first request message including the first information from the first device; And checking whether the second device can use the DRM content by using the first information.

In order to achieve the above object, the device-to-device DRM content delivery method according to the present invention comprises the steps of: receiving a first request message including the first information from the first device; Checking whether the second device can use DRM content using the first information; And if it is determined that the use of the DRM content is unavailable, the second device includes transmitting an error message to the first device.

In addition, if it is determined that the use of the DRM content is not available, the second device further comprises the step of directly requesting the content issuer to download the DRM content suitable for the use capability of the second device.

In addition, if there is a request for downloading the DRM content, characterized in that it further comprises the step of receiving a Download Descriptor loaded with various information for downloading the DRM content from the content issuer.

In addition, if there is a request for downloading the DRM content, characterized in that it further comprises the step of receiving xHTML to browse from the content issuer.

If the second device determines that the DRM content is available, the second device transmits a message indicating that the DRM content is available to the first device; Transmitting, by the first device, the corresponding DRM content to the second device; And transmitting a transmission result message indicating that the second device has received the corresponding DRM content to the first device.

In order to achieve the above object, the device-to-device DRM content delivery method according to the present invention comprises the steps of receiving the capability information of the second device requested by the first device to the second device; Checking whether the first device can use the DRM content by using the capability information of the second device; If it is determined that the DRM content is not available, the first device may include transmitting second information necessary for downloading the DRM content to the second device.

In addition, when the second device receives the second information required to download the DRM content from the first device, the second device sends an OK message to the first device; Requesting, by the second device, directly from a content issuer to download DRM content suitable for the usage capability of the second device; The method may further include receiving DRM content corresponding to the capability information of the second device from the content issuer.

In addition, if there is a request for downloading the DRM content, characterized in that it further comprises the step of receiving a Download Descriptor loaded with various information for downloading the DRM content from the content issuer.

In addition, if there is a request for downloading the DRM content, characterized in that it further comprises the step of receiving xHTML to browse from the content issuer.

In order to achieve the above object, the apparatus for DRM content delivery according to the present invention, the communication module unit including a transceiver for receiving the DRM content from the content issuer, and performs communication between the device and the content issuer If it is determined that the DRM content, the content UID and the content issuer URI information are received and the memory unit that stores the device's usability information, and the availability of the DRM content provided from another device is found to be impossible, the content issuer is requested to download the content. It characterized in that it comprises a processing unit for.

The present invention is applied to a DRM system and apparatus using digital copyrights. However, the present invention can be applied to wired and wireless communication as well.

The basic concept of the present invention is that even when the DRM content is transmitted between devices, even when the transmission capability between the transmitting device and the receiving device is different (collectively referred to as hardware specifications or software specifications of the device enabling the DRM content to be used). The receiving device directly downloads the DRM content from the content issuer, and then downloads the download descriptor or download the DRM content, and then uses the programs to download and use the DRM content.

The device according to the present invention may be commonly used as a terminal, and includes all terminals capable of using digital content. That is, the device according to the present invention, i.e., the terminal, is a mobile communication terminal (e.g., a user equipment (UE), a mobile phone, a cellular phone, a DMB phone, a DVB-H phone, a PDA phone, and a PTT phone) that can use a VCC service. And digital TV, GPS navigation, handheld game consoles, MP3 and other consumer electronics, and so forth. Therefore, in the description of the present invention, the device is used interchangeably in the same meaning as the terminal. In addition, the apparatus according to the present invention internally includes a communication module, Web / WAP browser, DRM agent, media player & library and memory.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the embodiment of the method for delivering the right of use in digital rights management according to the present invention.

2 is a block diagram of a digital rights management (DRM) system in accordance with the present invention.

As shown in FIG. 2, the DRM system according to the present invention includes a rights issuer (RI) 30 for issuing a usage right required to use DRM content, and a content issuer (CI) for issuing DRM content actually used. 40 and at least one or more devices (terminals) receiving the usage right and the DRM content from the usage right issuer 30 and the content issuer 40, for example, device 1 10 and device 2 in FIG. And (20).

Each device, that is, device 1 (10) and device 2 (30) internally includes a communication module, Web / WAP browser, DRM agent, media player & library and memory.

In addition, the DRM agent embedded in each of the device 1 (10) and the device 2 (30) is issued a usage right from the usage rights issuer, the DRM content is issued from the content issuer.

In addition, after the device 1 downloads the DRM content from the content issuer, the device 1 makes a request for delivery to the device 2 to deliver the downloaded DRM content.

In this case, the delivery request signal (or message) includes specific information. The specific information includes the profile of the DRM content and the URL of the content issuer to provide a criterion for checking whether the device 2 can use the corresponding DRM content.

In addition, the device 2 receives the delivery request signal and checks whether the device 2 has the ability to use the DRM content.

If it is checked that it is available, it sends a message that it is available (for example, OK message) to the device1 to receive the DRM content, and if it is not available, it downloads Download Descriptor or xHTML to download the DRM content directly from the content issuer. By receiving the DRM content can be downloaded from the device 2.

3 and 4 illustrate a procedure of moving digital content in the DRM system according to the first embodiment of the present invention.

3 and 4, first, the DRM agent embedded in the device 1 receives rights objects for specific DRM content from a rights issuer (RI) and issues DRM content from the content issuer (CI). Receive.

That is, when the content issuer transmits the DRM content to the device 1, the device 1 downloads the transmitted DRM content.

The device 1 transmits a DRM content delivery request signal to the device 2 to exchange, copy, move, or ad-hoc share the DRM content downloaded from the content issuer.

The delivery request signal includes a URL of a content issuer and profile information of a DRM content. In this case, the profile information includes a screen resolution, a codec, a security algorithm, and the like of the DRM content.

The device 2 collectively refers to the hardware capability or software specification of the device (DRM content that can use the DRM content) based on the profile information of the DRM content received from the device 1, that is, the screen resolution, codec, and security algorithm. Check that the DRM content is available.

As a result of the check, if the device 2 confirms that the corresponding DRM content is available, the device 2 sends an OK response message to the device 1.

Accordingly, the device 1 transmits the corresponding DRM content to the device 2.

When the transmission of the DRM content is completed, the device 2 transmits a transmission result message indicating that the transmission is completed to the device 1 again.

If the device 2 confirms that the corresponding DRM content is not available by its use capability, the device 2 sends an error message to the device 1.

In this case, the device 2 directly accesses the URL of the content issuer obtained from the device 1 and requests the download of the DRM content.

At this time, the download request signal of the device 2 includes the content UID (User Identification) and the capability information of the device 2, that is, information including hardware specifications and software specifications having a screen resolution, codec, security algorithm, memory capacity or CPU capacity. Are sent together.

The content UID is an ID issued by a content provider, and content having the same content has one ID. For example, certain movie content has a single ID regardless of its resolution, issue time, encryption algorithm, or codec.

In addition, since the capability information of the device 2 includes hardware specification and software specification information such as a screen resolution, a codec, a storage capacity, a CPU processing speed, and the like, the current capability of the device 2 can be determined.

Therefore, the content issuer can check the usage capability information of the device 2 as described above, determine the usage capability of the device 2, and then provide the device 2 with DRM content suitable for the usage capability of the device 2.

As a response to the download request signal of the device 2, the content issuer delivers a Download Descriptor for downloading DRM content or xHTML for browsing. In particular, the Download Descriptor has various kinds of information necessary for downloading content.

Accordingly, the device 2 may download the corresponding DRM content through the Download Descriptor and browse through the xHTML.

If the content issuer cannot issue the DRM content that matches the profile of the device 2, it transmits an error message to the device 2 indicating that it is impossible to issue.

On the other hand, when the user of the device 2 needs to pay a fee for newly downloaded content, the content issuer may pay a fee through browsing using xHTML.

5 and 6 illustrate a procedure of delivering digital content in a DRM system according to a second embodiment of the present invention.

Referring to FIG. 5, first, a DRM agent embedded in the device 1 receives rights objects for specific DRM content from a rights issuer (RI) and receives DRM content from a content issuer (CI).

That is, when the content issuer transmits the DRM content to the device 1, the device 1 downloads the transmitted DRM content.

The device 1 sends a capability information request signal of the device 2 to the device 2 to exchange, copy, move or temporarily share the DRM content downloaded from the content provider.

Accordingly, the device 2 transmits its usage capability information to the device 1.

In this case, the capability information is information necessary for checking whether or not the DRM content can be used by the device 2. Examples of the information include screen resolution, codec, security algorithm, storage capacity, processing speed of the CPU, and the like. There is information including hardware specifications and software specifications.

The device 1 analyzes the device 2 capability information, that is, hardware specification or software specification of the device that can use the DRM content, based on profile information (screen resolution, codec, security algorithm, etc.) of the DRM content. Check if the DRM content is available.

If it is determined that the device 2 can use the corresponding DRM content, the device 1 delivers the DRM content to the device 2.

When the transmission of the DRM content is completed, the device 2 transmits the transmission completion result message back to the device 1.

As shown in FIG. 6, if the device 2 determines that the corresponding DRM content is not available by checking the device 1, the device 1 may first download the DRM content from the content issuer directly from the content issuer. Send the URL information to the device 2.

The device 2 receiving the content UID and the content issuer URL information has received the content UID and the content issuer URL information necessary for making a request to the content issuer server in order to receive the content optimized for playback. Send a message (eg OK message, etc.) back to Device1.

In this case, the device 2 directly accesses the URL of the content issuer obtained from the device 1 and requests the download of the DRM content.

In this case, the content requesting device (UID) and the capability information of the device 2 are transmitted together with the download request signal of the device 2.

The content UID is an ID issued by a content provider, and content having the same content has one ID. For example, certain movie content has a single ID regardless of its resolution, issue time, encryption algorithm, or codec.

In addition, since the capability information of the device 2 includes hardware specification and software specification information such as a screen resolution, a codec, a security algorithm, a storage capacity, a CPU processing speed, and the like, the current capability of the device 2 can be determined.

Therefore, the content issuer can check the usage capability information of the device 2 as described above, determine the usage capability of the device 2, and then provide the device 2 with DRM content suitable for the usage capability of the device 2.

As a response to the download request signal of the device 2, the content issuer delivers a Download Descriptor for downloading DRM content or xHTML for browsing. In particular, the Download Descriptor has various kinds of information necessary for downloading content.

Accordingly, the device 2 may download the corresponding DRM content through the Download Descriptor and browse through the xHTML.

If the content issuer cannot issue the DRM content corresponding to the use capability of the device 2, the content issuer transmits an error message indicating that the content issuer cannot execute the device.

Hereinafter, the configuration and operation of the apparatus according to the present invention will be described with reference to FIG.

The device (terminal) 100 according to the present invention internally includes a communication module unit 101, a Web / WAP browser 102, a DRM agent 103, a memory 104, and a media player & library (not shown). The hardware configuration is included.

In other words, the device 100 according to the present invention is connected to the license issuer (RI), transmits and receives a signal for performing registration, receives the DRM content from the content issuer (CI), and performs communication between the devices. It includes a communication module unit 101 including a transceiver.

In addition, the device 100 according to the present invention, stores the usage rights received from the rights issuer (RI), and stores the DRM content, content UID and content issuer URI information received from the content provider and other devices It includes a memory 105 that stores the capability information of the.

In addition, the device 100 according to the present invention includes a processor 106 for checking whether the device 2 can use the DRM content provided from the device 1. The processor 106 may also be referred to as a controller.

However, the device 100 according to the present invention, in addition to the components shown in FIG. 7, essential essential components of the device (terminal) required for using the DRM content are obvious to those skilled in the art. The description thereof is omitted.

In the above, the present invention has been described with reference to the embodiments shown in the drawings, but this is merely exemplary, and those skilled in the art may realize various modifications and other equivalent embodiments therefrom. I will understand.

As described above, the present invention, even if the usage ability according to hardware or software specifications between the device and the receiving device when transmitting the DRM content between the device is different from the content issuer directly from the content issuer to the user's ability to use By downloading and using the DRM content, it is possible to increase the usability of the DRM content.

Claims (24)

       Receiving, by the second device, a first request message that includes the first information from the first device;        Confirming whether the second device can use the DRM content by using the first information; wherein checking whether the DRM content is available comprises using the second device based on profile information of the DRM content. A method for delivering device-to-device DRM content, comprising determining whether the DRM content can be used through capability information.        Receiving, by the second device, a first request message that includes the first information from the first device;        Checking whether the second device can use the DRM content by using the first information, and checking whether the DRM content is available by using the first device based on the capability information of the second device based on the profile information of the DRM content. Confirming whether or not the DRM content is available through; If it is determined that the DRM content is not available, sending, by the second device, an error message to the first device; If it is determined that the use of the DRM content is unavailable, And requesting, by the second device, directly from a content issuer to download DRM content available in the usage capability of the second device. The method of claim 1 or 2, wherein the first request message is DRM content delivery method between the device, characterized in that any one of the exchange, copy, move or temporary sharing request message. The method of claim 1 or 2, wherein the first information is And transmitting the profile information of the DRM content and URL information of the content issuer. The method of claim 4, wherein the profile information of the DRM content, A method for delivering DRM content between devices, including screen resolution, codec, security algorithm, required memory capacity, or CPU capacity. delete According to claim 1 or 2, wherein the capability information of the second device is DRM content delivery method, characterized in that the information including the hardware resolution and software specifications of the screen resolution, codec, security algorithm, storage capacity, CPU processing speed of the second device. delete The method of claim 2, wherein the DRM content download request Method for delivering DRM content between devices, including content UID and the capability information of the second device. 10. The method of claim 9, wherein the capability information of the second device, Method for delivering DRM content between devices, comprising information including a screen resolution, a codec, a security algorithm, a storage capacity, a hardware specification and a software specification of a CPU processing speed. The method of claim 2, wherein the DRM content download request is The method of claim 1, further comprising the step of receiving a download descriptor (Download Descriptor) is loaded with a variety of information for downloading the DRM content from the content issuer. The method of claim 2, wherein the DRM content download request is And receiving xHTML to browse from the content issuer. The method of claim 1 or 2, wherein if it is confirmed that the DRM content is available in the second device, Sending, by the second device, a message to the first device indicating that DRM content is available; Transmitting, by the first device, the corresponding DRM content to the second device; And transmitting, to the first device, a transmission result message indicating that the second device has received the corresponding DRM content. Receiving, by a first device, usage information of the second device requested by the second device; Checking whether the first device can use the DRM content by using the capability information of the second device; And if it is determined that the DRM content is not available, transmitting the second information necessary for downloading the DRM content to the second device by the first device. The method of claim 14, wherein the second information is Method for delivering DRM content between devices comprising the profile of the DRM content and the URL information of the content issuer. 15. The method of claim 14, wherein if the second device receives second information necessary to download DRM content from the first device, Sending, by the second device, an OK message to the first device; Requesting, by the second device, directly from a content issuer to download DRM content available in the capability of the second device; And receiving DRM content corresponding to the capability information of the second device from the content issuer. The method of claim 16, wherein the capability information of the second device, Method for delivering DRM content between devices, comprising information including a screen resolution, a codec, a security algorithm, a storage capacity, a hardware specification having a CPU processing speed, and a software specification. The method of claim 14, wherein checking availability of the DRM content comprises: And determining whether or not the DRM content can be used by analyzing the capability information of the second device based on the profile information of the DRM content. 17. The method of claim 16, wherein the DRM content download request Method for delivering DRM content between devices, including content UID and the capability information of the second device. 17. The method of claim 16, wherein if there is a request to download the DRM content, The method of claim 1, further comprising the step of receiving a download descriptor (Download Descriptor) is loaded with a variety of information for downloading the DRM content from the content issuer. 17. The method of claim 16, wherein if there is a request to download the DRM content, And receiving xHTML to browse from the content issuer. The method of claim 14, wherein if the second device determines that the DRM content is available, Transmitting, by the first device, the corresponding DRM content to the second device; And transmitting, to the first device, a transmission result message indicating that the second device has received the corresponding DRM content. The method of claim 16, wherein when the DRM content is downloaded to the second device and the user needs to pay a fee for the downloaded DRM content, Method for delivering DRM content between devices, wherein the content issuer pays a fee through browsing using xHTML. A communication module unit for receiving DRM content from a content issuer and including a transceiver configured to perform communication between devices; A memory unit for storing the DRM content, the content UID, and the content issuer URL information received from the content issuer and the device capability information; And a processing unit that checks the availability of the DRM content provided from the other device and requests a download request to the content issuer.

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