KR100681332B1 - General purpose integrated circuit card, content providing method and mobile communication terminal using same - Google Patents

Abstract

The present invention relates to a content providing method using a general purpose integrated circuit card and a mobile communication terminal equipped with the same.

The present invention is characterized by reproducing the purchased DRM content even if the terminal is changed through the general-purpose integrated circuit card including the DRM content and the rights object.

According to the present invention, even if the terminal is changed, an effect of continually using the purchased content using a general-purpose integrated circuit card can be expected.

Description

Unified Integrated Circuit Card, Method for Providing Contents by Using Unified Integrated Circuit Card and Mobile Terminal Embedding Universal Integrated Circuit Cards}

1 is a block diagram schematically illustrating a system for providing DRM contents using a general purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

2 is a block diagram schematically illustrating an internal configuration of a general purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

3 is a diagram illustrating a structural relationship between files existing in the memory unit 140 of the general-purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

4 is a view showing a content providing method using a general-purpose integrated circuit card 110 according to an embodiment of the present invention.

5 is a diagram illustrating an example of use of a general-purpose integrated circuit card 110 according to an embodiment of the present invention.

The present invention relates to a content providing method using a general-purpose integrated circuit card and a mobile communication terminal equipped with the same, and more particularly, to a content providing method for providing content information from a portable storage device to a terminal and a mobile communication terminal equipped with the same. It is about.

In modern times, copyright infringement is increasing day by day due to the rapid transition from the analog era to the digital age, the spread of the Internet, the development of multimedia and digital technologies, and the expansion of new copying devices.

In order to effectively protect such digital contents, the concept of digital rights management (DRM) has been introduced.

DRM allows unrestricted access to encrypted digital content, and requires a license called the Rights Object to decrypt and play the encrypted digital content. Therefore, digital content can be effectively protected by applying DRM.

Conventional Unified Integrated Circuit Card (Unified Integrated Circuit Card) due to the limitation of the memory size could not provide a lot of additional services in addition to the basic authentication, identification, roaming function.

Recently, the general-purpose integrated circuit card is able to provide various additional services by increasing the memory capacity by applying the flash memory.

The DRM agent (decryption of encrypted data) provided by the conventional mobile communication terminal is a module embedded in the terminal that can reproduce the DRM content as usable content when driving the DRM content implemented on the platform of the terminal.

Since the structure of the terminal manages rights objects and DRM contents in the memory and the platform of the terminal, when the user changes the terminal, there is a problem in that the purchased digital content cannot be used again or the content must be downloaded again.

In order to solve the above problems, the present invention is to provide a content providing method using a general-purpose integrated circuit card for transmitting the content information from the portable storage device to the terminal and a mobile communication terminal equipped with the same.

A mobile communication terminal for reproducing digital content information according to an aspect of the present invention for achieving the technical problem, respectively, from a digital rights management server storing the encrypted rights object and a content providing server storing the digital rights management content, respectively. A mobile communication terminal body receiving the digital rights management content and the encrypted rights object; And a general-purpose integrated circuit card for receiving and storing the digital rights management content and the encrypted rights object from the mobile communication terminal body and transmitting the digital rights management content data to the mobile communication terminal body.

According to another aspect of the present invention, there is provided a content providing method for providing digital content information, comprising: (a) receiving a digital rights management content and an encrypted rights object from a content providing server and a digital rights management server, respectively, to provide a digital rights management content service. Transmitting to a providing universal integrated circuit card; (b) generating a use request signal for digital rights management content and transmitting it to the general purpose integrated circuit card; And (c) receiving the original content data from the general purpose integrated circuit card that converts the digital rights management content into original content data using the encrypted rights object and playing it back in a content application.

According to still another aspect of the present invention, there is provided a general-purpose integrated circuit card, which stores data for user authentication and basic network information, comprising: a memory unit for storing digital rights management contents and rights objects; An encryption module that receives the digital rights management content and the rights object and performs encryption or decryption; And a digital rights management agent controlling the memory unit and the encryption module for performing a digital rights management process, and converting the digital rights management content into original content by using the rights object. Rights Management Agent).

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In addition, when a part is said to "include" a certain component, it means that it may further include other components, except to exclude other components unless otherwise stated.

Now, a general integrated circuit card 110 according to an embodiment of the present invention, a content providing method using the same, and a mobile communication terminal will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a system for providing DRM contents using a general purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

The DRM content providing system includes a mobile communication terminal body 100, a general purpose integrated circuit card 110, a content providing server 120, and a digital rights management server 130.

The mobile communication terminal main body 100 controls the digital signal processing and the call processing of the mobile communication terminal, and in the form of a request and a response with the general-purpose integrated circuit card 110, IS-95 and A modem chip (Mobile Station Modem) in charge of the processing of the communication protocol defined in the IS-2000, and a contact module for connecting the mobile communication terminal main body 100 and the general-purpose integrated circuit card 110.

The mobile communication terminal main body 100 transmits a DRM content download request signal to the content providing server 120, and receives a DRM content desired by the user from the content providing server 120 in response to the request. To send.

The mobile terminal 100 transmits a rights object request signal, which is a license for playing DRM content, to the digital rights management server 130 and, in response, sends the encrypted rights object from the digital rights management server 130. Receives and transmits to the universal integrated circuit card (110).

Here, the rights object includes the definition of the rights of the content and the constraints on the rights, and also includes the rights to the rights object itself.

An example of the right to the content may be the reproduction of the content, and an example of the limitation may be the number of times of playing the content, the playing time, the playing period, and the like.

The rights to the object itself can be moved or copied. In other words, the rights object with the movement right may be moved to another device or the general purpose integrated circuit card 110.

The rights object with copy rights may be duplicated to another device or general purpose integrated circuit card 110.

The mobile communication terminal main body 100 is connected to a mobile communication network to perform a normal voice call through wireless communication, and performs a session setting procedure automatically according to a session establishment request from the mobile communication network and transmits and receives packet data. to be.

The mobile communication terminal main body 100 may preferably be provided with a data service by accessing the Internet through a provided web browser.

The mobile terminal 100 is a PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA-2000 phone, WiBro (Wireless Broadband) phones DMB (Digital Multmedia Broadcasting) phones and the like. In addition, the mobile communication terminal body 100 should be provided with a browser (Browser) that can transmit and receive data as a means for accessing the SMS center through the mobile communication network, such a browser is a wireless application protocol (WAP: Wireless Application) Protocol based WAP browser, HTML based HTTP using HTTP protocol, MIE (Microsoft Internet Explorer), Handheld Device Transport Protocol (HDTP) I-mode, Binary Runtime Environment for Wireless (BREW) It may be, but is not limited thereto. Among the Internet access protocols used by the mobile communication terminal body 100, MIE uses a shortened version of HTML by slightly modifying HTML, and in the case of i-Mode, a compact HTML (c-HTML), which is a subset of HTML, is used. Use language.

The Unified Integrated Circuit Card (110) includes a microprocessor unit, memory, card operating system, security algorithms, and EEPROM (Electronically Erasable Programmable Read Only Memory). It is a smart card in the form of a chip on board (COB) with its own operations and mass storage.

The universal integrated circuit card 110 is a subscriber identification module inserted into a mobile communication terminal and used in a user subscriber identity module (USIM) in a wideband code division multiple access (WCDMA) network and a SIM in a global system for mobile communications (GSM) network. (Subscriber Identity Module) and CDMA (Code Division Multiple Accesse) networks operate as a Removable User Identity Module (R-UIM) function, and additional services can be provided by adding an application program.

The general purpose integrated circuit card 110 receives the rights object and the DRM content data from the mobile communication terminal body 100 and stores the rights object and the DRM content data in the memory.

The content providing server 120 stores the encrypted content and receives a DRM content download request signal including the selected content information from the mobile terminal 100.

The content providing server 120 searches a content database (not shown) using the selected content information included in the DRM content download request signal as a query, extracts the DRM content data matching the selected content information, and then extracts the extracted DRM content data. The mobile communication terminal transmits to the main body 100.

Here, the encrypted content refers to content protected by DRM. In order to reproduce the content, a right object for the content is required.

The digital rights management server 130 stores a rights object capable of playing DRM content, and receives a rights object download request signal including the aforementioned DRM content index information.

The digital rights management server 130 searches the rights object database (not shown) with the DRM content index information included in the rights object download request signal as a query, extracts the rights object matching the DRM content index information, and then extracts the rights. The object is transmitted to the mobile communication terminal body 100.

Hereinafter, since the general configuration of the general-purpose integrated circuit card 110 is a well-known technology, a detailed description thereof will be omitted, and a detailed description will be given with reference to FIG.

2 is a block diagram schematically illustrating an internal configuration of a general purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

The general purpose integrated circuit card 110 according to the embodiment of the present invention includes a DRM agent 120, an encryption module 130, a communication module 140, and a memory unit 150.

The DRM agent 120 functions to control each component module to perform a digital rights management (DRM) process.

The DRM agent 120 receives the DRM content and the encrypted rights object from the mobile terminal 100 and stores the received DRM content in the memory unit 150.

The encryption module 130 includes a Rivest Shamir Adleman (hereinafter referred to as RSA) module and an Advanced Encryption Standard (hereinafter referred to as AES) module.

The RSA module 132 is a module that performs public key encryption and performs RSA encryption or decryption of a rights object under the control of the DRM agent 120. Here, public key encryption is referred to as asymmetric encryption, and means that the key used to decrypt the data is different from the key that encrypts the data.

The AES module 134 is a symmetric key encryption module 130 and performs symmetric key encryption or decryption using the generated session key.

The AES module 134 receives the content encryption key from the rights object and encrypts it with the session key, and encrypts or decrypts the DRM content received in the communication process.

The RSA algorithm and the AES algorithm are publicly known technologies, and detailed descriptions thereof will be omitted.

The communication module 140 performs a communication interface function for connecting the universal integrated circuit card 110 to each other through a wired / wireless medium so as to transmit and receive various signals / messages with the mobile communication terminal body 100.

The memory unit 150 includes a rights object area 152 that stores an encrypted rights object and a DRM content area 154 that stores DRM content received from the mobile terminal 100.

Since the general purpose integrated circuit card 110 is composed of the file structure of the IS07816-3, the file structure of FIG. 3 is provided to store the DRM content and the encrypted rights object.

Hereinafter, the structural relationship between the DRM content and the rights object file stored in the memory unit 150 will be described with reference to FIG. 3.

3 is a diagram illustrating a structural relationship between files existing in the memory unit 140 of the general-purpose integrated circuit card 110 according to an exemplary embodiment of the present invention.

Since the general-purpose integrated circuit card 110 is composed of the file structure of the IS07816-3, the file structure of FIG. 3 may be provided to use the DRM content and the rights object to use the DRM content and the rights object.

As shown in FIG. 3, the master file is the logical root of the file hierarchy for the application of the general purpose integrated circuit card 110. FIG.

The master file configures the contents dedicated file at the dedicated file level by utilizing the characteristics of each applet below.

The content-only file manages each DRM content (video, music, game, etc.) in each element file list (content base file, rights object base file, etc.).

Access to the basic file list can be recorded, read, deleted, etc., so that the content name can be changed and the order can be changed. However, the basic file for each rights object cannot be recorded, read, or deleted by the user.

Therefore, the general purpose integrated circuit card 110 stores and manages the DRM content and the rights object in each basic file list whenever the mobile communication terminal body 100 downloads the DRM content and the rights object.

In addition, when the general-purpose integrated circuit card 110 receives the use request signal for the DRM content from the content application of the mobile terminal 100, the DRM content and rights object are read from the memory path stored in the basic file list. Load in

Hereinafter, a method of providing DRM content using the general purpose integrated circuit card 110 to the mobile communication terminal body 100 will be described with reference to FIG. 4.

4 is a view showing a content providing method using a general-purpose integrated circuit card 110 according to an embodiment of the present invention.

The mobile terminal 100 generates a DRM content download request signal including the selected content information and transmits the generated DRM content to the content providing server 120 providing the DRM content.

The mobile terminal 100 receives the DRM content data desired by the user from the content providing server 120 and transmits the DRM content data to the general purpose integrated circuit card 110 (S100).

The mobile communication terminal body 100 generates a rights object download request signal including the DRM content index information and transmits the generated rights object to the digital rights management server 130 that provides the rights object.

The mobile communication terminal main body 100 downloads the right object for playing the encrypted content from the digital rights management server 130 and transmits it to the universal integrated circuit card 110 (S100).

The digital rights management server 130 checks the DRM content data requested for purchase through a query with the content providing server 120, and then generates a rights object for the corresponding DRM content data and transmits the rights object to the mobile terminal 100. At this time, the content providing server 120 is charged for the DRM content.

The DRM content data and the encrypted rights object described above are stored in the rights object area 152 and the DRM content area 154 of the memory unit 150 of the general purpose integrated circuit card 110, respectively.

Thereafter, the mobile communication terminal main body 100 generates a use request signal for the DRM content in the content application and transmits the generated request signal to the general-purpose integrated circuit card 110 (S102).

When the DRM agent 120 of the general-purpose integrated circuit card 110 receives the use request signal for the DRM content, the DRM content data from the content base file stored in the element file list of the memory unit 150. Extract and load it into temporary storage memory.

The DRM agent 120 of the general-purpose integrated circuit card 110 extracts the rights object basic file corresponding to the aforementioned DRM content data stored in the basic file list of the memory unit 150 and encrypts the loaded DRM content data together with the loaded DRM content data. Send to module 130.

The encryption module 130 decrypts the rights object encrypted by the RSA module 132, decrypts the DRM content data in the AES module 134, and transmits the same to the DRM agent 120.

The DRM agent 120 receives the rights object and the DRM content data from the encryption module 130, restores the DRM content data using the received rights object, generates original content data, and transmits the original content data to the mobile communication terminal body 100. (S104).

Subsequently, the mobile communication terminal main body 100 reproduces the original content data received from the universal integrated circuit card 110 in the content application.

5 is a diagram illustrating an example of use of a general-purpose integrated circuit card 110 according to an embodiment of the present invention.

In general, the existing terminal is a DRM agent is implemented on the terminal platform to verify the available DRM content (games, music, etc.) when the DRM application is running. This structure causes a load on the terminal because the rights object and the DRM content are managed in the memory and the platform of the terminal. In addition, when the user changes the terminal, there is a problem in that the digital content purchased at a cost cannot be used again, or the DRM content is paid to the content providing server 120 and downloaded and used again.

As shown in FIG. 5, an embodiment of the present invention mounts a DRM agent on a general-purpose integrated circuit card 110 to continuously use various DRM contents used in a conventional terminal even when the terminal is changed, and from the terminal. It downloads and stores DRM content and rights object.

Therefore, according to the embodiment of the present invention, even if the terminal is changed, when the terminal is mounted on the terminal using the universal integrated circuit card 110 in which the DRM content and the rights object are stored, the user can continuously use the purchased DRM content.

In addition, the embodiment of the present invention can reduce the load of the terminal by performing the DRM process calculated by the terminal using a dedicated processor of the chip, there is an advantage that can efficiently store and manage the content.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

According to the above configuration, even if the terminal is changed, the present invention can be expected to have an effect that can continuously use the content purchased by using a general-purpose integrated circuit card.

According to the present invention, since the DRM process calculated in the terminal is performed by the general-purpose integrated circuit card, the load of the terminal can be reduced, and the effect of efficiently storing and managing the content can be expected.

Claims (7)

A mobile communication terminal for reproducing digital content information, A mobile communication terminal body receiving the digital rights management content and the encrypted rights object from a digital rights management server storing an encrypted rights object and a content providing server storing digital rights management content, respectively; And Universal integrated circuit card for receiving and storing the digital rights management content and the encrypted rights object from the mobile communication terminal body, and transmits the digital rights management content data to the mobile communication terminal body Mobile communication terminal comprising a. The method of claim 1, wherein the general-purpose integrated circuit card, A memory unit for receiving and storing the digital rights management content and the encrypted rights object from the mobile communication terminal body; An encryption module for receiving and decrypting the digital rights management content and the encrypted rights object; And Control the memory unit and the encryption module for performing a digital rights management process, when receiving the use request signal for digital rights management content from the mobile communication terminal body, the decoded rights object A digital rights management agent that converts the digital rights management content into original content data and transmits it to the mobile terminal; Mobile communication terminal comprising a. The method of claim 1, wherein the mobile communication terminal body, A digital rights management content download request signal including selected content information and a rights object download request signal including rights object index information are generated and transmitted to the content providing server and the digital rights management server, respectively, to transmit the digital rights management content and the encrypted data. And receiving a right object and transmitting the rights object to the general purpose integrated circuit card. The method of claim 2, wherein the memory unit, A dedicated file for each applet is formed under the master file, and a content-only file is formed at the dedicated file level, and the content-only file forms a respective basic file list to store the digital rights management content and the encrypted rights object. And a logical route of a file hierarchy stored and managed in the basic file list. In the content providing method for providing digital content information, (a) receiving digital copyright management content and encrypted rights object from a content providing server and a digital rights management server, respectively, and transmitting them to a general purpose integrated circuit card providing digital rights management content service; (b) generating a use request signal for digital rights management content and transmitting it to the general purpose integrated circuit card; And (c) receiving the original content data from the universal integrated circuit card converting the digital rights management content into original content data using the encrypted rights object and playing it in a content application. Content providing method comprising a. A general-purpose integrated circuit card that stores data for user authentication and basic network information, A memory unit for storing digital rights management contents and rights objects; An encryption module that receives the digital rights management content and the rights object and performs encryption or decryption; And A digital rights management agent which controls the memory unit and the encryption module for performing a digital rights management process, converts the digital rights management contents into original content using the rights object, and transmits the digital rights management agent. Management Agent) Universal integrated circuit card comprising a. The method of claim 6, wherein the general-purpose integrated circuit card, The mobile communication terminal main body stores the digital rights management contents and the rights object in the memory unit whenever the main body of the mobile communication terminal downloads the digital rights management contents and the rights object, respectively.

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