KR100833974B1 - Method and System for Generating Cluster File of Playing DCF File in Portable Player - Google Patents

Abstract

The present invention relates to a method and system for generating a cluster file for playing a DC file in a portable terminal.

The present invention generates a content providing server that stores a DCF (DRM Contents Format) file encrypted using a digital right management (DRM) technique, and a cluster file required to decrypt the DCF file. And a personal computer equipped with a DRM manager, which is an application that decrypts and plays the DCF file using the generated cluster file, and receives the cluster file from the personal computer and decrypts and plays the DCF file. In a system including a portable terminal, in a terminal equipped with the cluster file, the DCF file can be used regardless of the type of the terminal, the method for generating a cluster file for playing the DC file in the portable terminal, (a) performing data communication between the portable terminals; (b) reading identification information from the portable terminal to use the DCF file; (c) transmitting the identification information to the content providing server to register the identification information; (d) generating the cluster file which is data serving as a key for decrypting the DCF file provided from the content providing server; And (e) transmitting the cluster file to the portable terminal. The method provides a method of generating a cluster file for playing a DCF file in a portable terminal.

According to the present invention, a user who pays a legitimate fee for a DCF file to a content provider can use a variety of contents encrypted using a DRM technique not only for a mobile communication terminal but also for a portable terminal including an MP3 player, a PMP, and the like. It can be effective.

Handheld Terminals, DRM Techniques, DCF Files, Cluster Files

Description

Method and System for Generating Cluster File of Playing DCF File in Portable Player}

1 is a diagram schematically illustrating a system for generating a cluster file for playing a DCF file in a mobile communication terminal according to a preferred embodiment of the present invention;

2 is a diagram schematically showing the configuration of a mobile communication terminal equipped with a cluster file for playing a DCF file according to an embodiment of the present invention;

Figure 3 is a simplified diagram showing the configuration of a cluster file according to an embodiment of the present invention

4 is a flowchart illustrating a process of generating a cluster file for playing a DCF file in a mobile communication terminal according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: mobile communication terminal 102: wireless access network

104: mobile communication network 106: manganese interworking device

108: WAP gateway 110: Internet

112: content providing server 114: personal computer

200: key input unit 202: display unit

204: program storage unit 206: mode state storage unit

208: camera unit 210: camera module

212: camera control processor 214: microprocessor

216: digital signal processing unit 218: baseband conversion unit

220: RF signal processor 222: antenna

224: Speaker 226: Microphone

300: identification information unit 302: data unit

304: electronic signature

The present invention relates to a method and system for generating a cluster file for playing a DC file in a portable terminal. More specifically, if the user has legitimate authority to use the DC file in the process of downloading and playing the DC file to the mobile terminal, move the downloaded DC file to another mobile terminal other than the mobile terminal. A method and system for generating a cluster file for playing DC files in a portable terminal that can be used not only in a communication terminal but also in a portable terminal including an MP3 player, a portable multimedia player (PMP), and the like. will be.

Information and communication technology is changing the lifestyle of modern people. Almost all homes, schools, and offices have been equipped with personal computers with Internet access, which are used to acquire information through websites, purchase products through e-commerce, and exchange news via e-mail. In addition, only a few years ago, people could only use voice communication-oriented mobile communication services using mobile communication terminals. Recently, however, a wireless internet service that can receive a data communication service using the internet has appeared in a mobile communication terminal.

As the mobile communication service has evolved, the mobile communication terminal has evolved from the concept of a voice call-oriented mobile phone to a mobile communication terminal having various functions such as a camcorder, a camera, and an MP3 player. As various functions are included in the mobile communication terminal, the display device of the mobile communication terminal has also evolved from a black and white display device to a color display device. In general, a display device of a mobile communication terminal exists to inform a user of various types of state information of the mobile communication terminal, for example, a state of use of a power source, a reception strength of radio waves, a date and time, and the like. As a result of the development of information and communication technology, the spread of mobile communication terminals equipped with color display devices and the use of wireless Internet services have become popular, and the use of various contents in accordance with the performance of the mobile communication terminals has become popular. In general, a service for developing various contents and providing the developed contents to a user by using a wireless Internet service is called a content providing service. The content providing service provides a user with various contents developed after renting a mobile communication network from a mobile communication service provider that establishes and manages a mobile communication network.

Meanwhile, with the advent of the Internet, file exchange services between individuals have been in the spotlight. The file exchange service between individuals refers to a service that allows various types of contents to be exchanged in real time between personal computers connected to the Internet. Here, the various contents mean data including music, still images, moving pictures, and the like. This personal file exchange service is widely used in 2005, with more than 500,000 transfers per day. However, the file service between individuals is causing copyright problems because various contents are exchanged without permission of the content provider. In order to solve such a copyright problem, a method for preventing unauthorized use of various contents has recently emerged.

Recently, a method of preventing unauthorized use of various contents includes a digital right management (DRM) technique. Here, the DRM scheme means that a content provider encrypts a variety of contents using a predetermined encryption technique and then downloads the contents to a personal computer or a mobile terminal. This means the technology to make available. In other words, the DRM technique is a technology that allows users to use various contents only when the user pays a reasonable fee. In this case, the user who has just paid the fee receives a kind of key for decrypting the encrypted content from the content provider.

However, the DRM technique, which seems to completely solve the copyright problem, is limited to various contents provided to the mobile communication terminal and is commercialized, and has not been commercialized in portable terminals including MP3 players and PMPs. In such a case, the user who pays the legitimate cost can use various contents encrypted using the DRM technique only in the mobile communication terminal, and there is a problem in that the user cannot download and use it again in a portable terminal including an MP3 player, a PMP, and the like.

In order to solve the above-described problems, the present invention, if the user has a legitimate right to use the DC file in the process of downloading and playing the DC file to the mobile terminal, move the downloaded DC file to the mobile terminal To provide a method and system for generating a cluster file for playing a DC file in a mobile communication terminal that can be used not only in another mobile communication terminal but also a portable terminal including an MP3 player, a PMP, etc. There is this.

Accordingly, according to a first object of the present invention, a content providing server storing a DCF (DRM Contents Format) file encrypted using a digital right management (DRM) technique, and the DCF file are stored. A personal computer equipped with a DRM manager, which is an application for generating a cluster file necessary for decryption, decrypting and playing the DCF file using the generated cluster file, and receiving the cluster file from the personal computer. In a system including a portable terminal that decodes and plays a DCF file, the cluster that reproduces the DCF file in the portable terminal enables the terminal equipped with the cluster file to use the DCF file regardless of the type of the terminal. A method of generating a file, the method comprising: Performing data communication; (b) reading identification information from the portable terminal to use the DCF file; (c) transmitting the identification information to the content providing server to register the identification information; (d) generating the cluster file which is data serving as a key for decrypting the DCF file provided from the content providing server; And (e) transmitting the cluster file to the portable terminal. The method provides a method of generating a cluster file for playing a DCF file in a portable terminal.

In addition, according to a second object of the present invention, a ground infrastructure for exchanging data with a portable terminal wirelessly based on a predetermined protocol includes a handoff and a radio support management function, and the digital terminal includes digital rights management (DRM). The wireless access network relays a DCF (DRM Contents Format) file encrypted using a 'DRM' scheme, and a communication facility that provides voice telephone or data exchange service to an unspecified number of subscribers through an exchange. In a system including a mobile communication network that relays a DCF file to the portable terminal, a cluster for playing a DCF file in a portable terminal, such that the terminal equipped with the cluster file can use the DCF file regardless of the type of terminal. A system for creating a file, the system comprising: interrelating the DCF file with the mobile communication network A content providing server providing the net; And a personal computer including a DRM manager as an application for generating the cluster file and generating the cluster file as data serving as a key for decrypting the DCF file provided from the content providing server. Provided is a system for creating a cluster file for playing a DC file in a terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a diagram schematically illustrating a system for generating a cluster file for playing a DCF file in a mobile communication terminal according to a preferred embodiment of the present invention.

A system for generating a cluster file for reproducing a DCF file in a mobile communication terminal according to a preferred embodiment of the present invention includes a mobile communication terminal 100, a wireless access network 102, a mobile communication network 104, a network interworking device 106, WAP gateway 108, Internet 110, content providing server 112, personal computer 114, and the like.

For convenience of explanation in the following process, various contents provided by the content providing server 112 and various contents encrypted using the DRM technique are defined as a 'DRM Contents Format (DCF)' file. In addition, the DCF file downloaded from the content providing server 112 is decoded in the mobile terminal including the MP3 player, PMP, as well as the mobile communication terminal 100 and other mobile communication terminals other than the mobile communication terminal 100. Data that acts as a kind of key that makes it available is defined as a 'cluster file'. In addition, an application mounted on the mobile communication terminal 100, the portable terminal, and the personal computer 114 to generate a cluster file and to decode and reproduce the DCF file using the generated cluster file is defined as a 'DRM manager'. .

Brief description of the main features of the present invention. After the user downloads the DCF file provided from the content providing server 112, the mobile terminal 100 and other mobile communication terminals other than the mobile terminal 100, as well as in a portable terminal including an MP3 player, PMP, etc. To use it, a cluster file is generated through the personal computer 114. Here, the present invention not only generates the cluster file using the identification information of the mobile communication terminal 100 in the process of generating the cluster file, but also identifies the portable terminal and subscriber information of the user (for example, user name and resident registration). Number, email account, etc.) to create a cluster file.

Therefore, when the cluster file according to the preferred embodiment of the present invention is mounted on the mobile communication terminal 100 and a portable terminal including an MP3 player, a PMP, as well as another mobile communication terminal other than the mobile communication terminal 100. In other words, the DCF file provided from the content providing server 112 may be used not only in the mobile communication terminal 100 and in another mobile communication terminal other than the mobile communication terminal 100 but also in a portable terminal including an MP3 player, a PMP, and the like. There is a characteristic to make. However, in the following process, for convenience of description, downloading and mounting a cluster file from the personal computer 114 for the mobile communication terminal 100 and decoding the DCF file provided from the content providing server 112 and playing it back. It will be explained on the premise.

The mobile communication terminal 100 refers to a communication terminal that can use a web service in a wired / wireless communication environment, and downloads a cluster file generated by the personal computer 114 and then downloads a DCF file provided through the content providing server 112. Means a communication terminal to play after decoding. In addition, the mobile communication terminal 100 refers to a communication terminal that provides a voice call function connected to the mobile communication network 104 via the wireless access network 102 to perform a normal voice call wirelessly with another mobile communication terminal. do.

The mobile terminal 100 is a wireless application protocol, which is an Internet access protocol, Microsoft Internet Explorer (MIE) based on HTML using the HTTP protocol, a handheld device transport protocol, and NTT DOCOMO. By connecting to the Internet 110 via the mobile communication network 104 using a browser for Internet access, such as i-Mode or SK Telecom's 'NATE', in conjunction with the content providing server 112 connected to the Internet 110 The DCF file will be downloaded. Among the Internet access protocols used by the mobile communication terminal 100, MIE uses a shortened version of HTML, which is abbreviated m-HTML. In the case of i-Mode, a language called compact HTML (c-HTML), which is a subset of HTML, is used. use.

The wireless access network 102 is a network termination device that is directly connected to the mobile communication terminal 100 by performing baseband signal processing, wired / wireless conversion, and transmitting / receiving a wireless signal. Each of the wireless access networks 102 is arranged in units of cells. The call request generated from the communication terminal 100 is transmitted to the mobile communication network 104 or the call request of the mobile communication terminal 100 existing in the cell area controlled by the communication terminal 100 is transmitted to the mobile communication network 104 or the user has jurisdiction. It refers to a device for performing location information registration to determine the location of the mobile communication terminal 100 existing in the cell area.

In addition, the wireless access network 102 relays the mobile communication terminal 100 and the content providing server 112, and allocates and releases a radio channel for the mobile communication terminal 100, and soft-cell-off between cells for the mobile communication terminal 100. It performs soft hand off and hard hand off decisions, transcoding and vocoding, global positioning system (GPS) clock distribution, and operation and maintenance functions for the base station.

The mobile communication network 104 is a telephone exchange network operated by a mobile communication service provider and means a set of communication facilities that provide voice telephone or data exchange service to an unspecified number of subscribers through an exchange office, and is a CDMA-2000 service, a WCDMA service, and a mobile Internet. Provide a service and the like to the mobile communication terminal 100. The mobile communication network 104 performs basic and additional service processing, incoming and outgoing call processing of subscribers, location registration and handoff procedure processing, interworking with other networks, and DCF files provided from the content providing server 112 for mobile communication. It performs a function such as relaying to the terminal 100. The mobile communication network 104 of the IS-95 A / B / C system includes an Interconnection Network Subsystem (INS) that performs distributed call processing, a Central Control Subsystem (CCS) that performs centralization of operation and maintenance, and mobile communication. It includes a subsystem, such as a Location Registration Subsystem (RLS) that performs storage and management of information for subscribers. In addition, the mobile communication network 104 for the third and fourth generation may include an Asynchronous Transfer Mode (ATM) switch (not shown). The ATM switch increases the transmission rate and the efficiency of line use by packet transmission per cell. .

The inter-working function 106 provides an interface for data exchange between a wireless communication system and a wired communication system and converts protocols, signals, and data into a form suitable for each network. In general, the manganese interworking device 106 connects the mobile communication network 104 and the Internet 110.

The WAP gateway 108 refers to software for relaying wirelessly transmitting and receiving packet data between the mobile communication terminal 100 and the content providing server 112 via the mobile communication network 104 and hardware coupled thereto. The WAP gateway 108 performs a process such as communication code conversion or protocol conversion between the mobile communication network 104 and the Internet 110 in order to quickly retrieve and display information on the Internet 110. Performs a function of interconnecting 110. That is, the WAP gateway 108 converts the WAP protocol and the Internet TCP / IP (Transmission Control Protocol / Internet Protocol) protocol. Therefore, a Hyper Text Transfer Protocol (HTTP) protocol is used between the content providing server 112 and the WAP gateway 108 connected to the Internet 110, and a WAP protocol is provided between the mobile communication terminal 100 and the WAP gateway 108. The transmission and reception of data is performed. The WAP gateway 108 converts a website address (URL) request from the mobile communication network 104 into an HTTP request according to the WAP protocol, and then, from the content providing server 112 according to the HTTP protocol through the Internet 110, the website. Ask for an address. In addition, the WAP gateway 108 converts a variety of content in the HTML format received from the content providing server 112 into a binary code so that the mobile communication terminal 100 can recognize the content to the mobile communication terminal 100. send. Since the data passing through the WAP gateway 108 is converted into a binary code, there is an advantage that the amount of data is reduced and the burden on transmission to the mobile communication network 104 is reduced.

As described above, the WAP is a general term for a communication protocol that enables the Internet 110 to be used using a wireless communication terminal such as a mobile communication terminal 100 or a personal information terminal. In the WAP, in order to solve a communication speed problem of a relatively slow wireless communication, the WAP is converted into a text code on the Internet 110 and transmitted to a wireless communication terminal. In addition, the WAP is designed in consideration of the content and the wireless communication terminal to use the WAP from the model design, so that users can use the Internet 110 with only the wireless terminal.

The Internet 110 refers to a communication network that provides a connection path for the mobile communication terminal 100 to transmit and receive packet data after connecting to the content providing server 112 via the mobile communication network 104.

The content providing server 112 is interworked with the mobile communication network 104 and the Internet 110, and when a communication channel is allocated between the WAP gateway 108 and the mobile communication terminal 100, the mobile communication via the WAP gateway 108 is performed. It means the software providing the DCF file encrypted using the DRM technique to the terminal 100 and the hardware coupled thereto. In addition, in the present invention, the content providing server 100 generates a cluster file, which is data serving as a kind of key for decrypting the encrypted DCF file, in association with the personal computer 114. Here, in the process of generating the cluster file, the content providing server 112 generates a cluster using identification information of the mobile communication terminal 100, identification information of a portable terminal including an MP3 player, a PMP, and the like, and user subscriber information. Create a file. Therefore, in the present invention, the user only needs to generate a cluster file by interworking with the content providing server 112 through the personal computer 114, and transmits the DCF file provided from the content providing server 112 to the mobile communication terminal 100 and the user. In addition to the mobile terminal other than the mobile terminal 100, it can be used universally in a portable terminal including an MP3 player, PMP, and the like.

The personal computer 114 includes a desktop computer, a notebook computer, and the like, and has a software having various functions such as document creation, game execution, music playback, still image playback, video playback, and the like, and interworking with the content providing server 112. DRM Manager, an application that creates a cluster file and decrypts and plays the DCF file using the generated cluster file, is loaded. The personal computer 114 connects to the mobile communication terminal 100 in a wired / wireless form to complete data synchronization after completing a synchronization operation. The personal computer 114 generates a cluster file for decoding the DCF file provided from the content providing server 112 and transmits the cluster file to the mobile communication terminal 100 during data communication.

2 is a diagram showing the configuration of a mobile communication terminal equipped with a cluster file for reproducing a DCF file according to a preferred embodiment of the present invention, and FIG. 3 is a diagram showing the configuration of a cluster file according to a preferred embodiment of the present invention. Drawing.

A mobile communication terminal 100 having a cluster file for playing a DCF file according to a preferred embodiment of the present invention has a key input unit 200, a display unit 202, a program storage unit 204, and a mode state storage unit. 206, a camera unit 208, a microprocessor 214, a digital signal processor 216, a baseband converter 218, an RF signal processor 220, an antenna 222, a speaker 224, and a microphone ( 226) and the like.

The mobile communication terminal 100 downloads the cluster file from the personal computer 114 to decrypt and reproduce the encrypted DCF file provided from the content providing server 112, and stores the downloaded cluster file in the program storage unit 204. Will be mounted on. Here, the mobile communication terminal 100 generates a cluster file in cooperation with the personal computer 114. In the process of generating the cluster file, the mobile terminal 100 transmits identification information of the mobile communication terminal 118 to the personal computer 114.

The key input unit 200 drives a DRM manager for reproducing a DCF file and a button for inputting characters, including a numeric key for inputting a number such as a phone number, and drives the camera unit 208 to photograph a subject. It has a special key. In the present invention, the user operates the key input unit 200 provided in the mobile communication terminal 118 to request the DCF file playback, the DRM manager is requested to play the DCF file is a cluster mounted in the program storage unit 204 Decode and play the DCF file using the file.

The display unit 202 displays an operation state of the mobile communication terminal, including a power supply state, a radio wave reception strength, a date and time, and displays a process of playing a DCF file.

The program storage unit 204 includes an electrically erasable programmable read only memory (EEPROM), a flash memory, a random access memory (RAM), and the like. The flash memory stores a real time operating system, a mobile terminal call processing software, a cluster file, a DRM manager for generating a cluster file, and reproduces a DCF file. It is loaded into RAM and runs. Here, the DRM manager, which is an application that creates a cluster file, decrypts and plays back an encrypted DCF file using the generated cluster tile, is developed / provided as a wireless Internet platform for interoperability (WIPI) or a BREW application of Qualcomm. When the file is requested to be played, the cluster file mounted in the program storage unit 204 is loaded to decode and play the DCF file.

In addition, as shown in FIG. 3, the cluster file is provided from the identification information unit 300 and the content providing server 112 including identification information of the mobile communication terminal 100, identification information of the portable terminal, and subscriber information of the user. A data unit 302 including a key seed, which is a random number data used to decrypt a DCF file, and an electronic signature unit 304 including information on an electronic signature indicating that the data has been encrypted using a DRM technique. It is configured by. Here, the identification information of the mobile communication terminal 100 and the identification information of the mobile terminal are information unique to the manufacturer and given to each of the mobile communication terminal 100 and the portable terminal, and means information combined with a series of numbers and symbols. . In particular, the identification information of the mobile communication terminal 100 means information such as an ESN (Electronic Serial Number), MIN (Mobile Identification Number). In addition, the user's subscriber information means information such as the user's name, social security number, email account, etc., and the DRM manager effectively recognizes and uses the Key Seed only in a device having information that matches the information of the identification information unit 300. .

The data unit 302 including a key seed has a random value and is used to derive a key value capable of decoding the DCF file by the DRM manager.

Finally, the digital signature unit 304 verifies that the cluster file is not arbitrarily manipulated, but is generated from the DRM digital signature that generates the DCF file and manages the key seed. The digital signature unit 304 hashes the information of the identification information unit 300 and the data unit 302 and encrypts it with a secret key of the DRM digital signature to generate an electronic signature. In the device using the cluster, the DRM manager stores the public key of the DRM digital signature, and then uses the cluster after checking the digital signature unit 304 of the cluster as the public key of the DRM digital signature.

The mode state storage unit 206 stores the current operation mode of the mobile communication terminal 100 selected by the key input unit 200 as a state flag (eg, 0, 1, 2, ...). That is, the microprocessor 214 assigns a unique status flag to each mode to distinguish the standby mode, the origination mode, the search mode, the call mode, the normal incoming mode, and the DCF file playback mode of the mobile communication terminal. The storage unit 206 is updated.

That is, when the user operates the DRM manager by operating the key input unit 200 provided in the mobile communication terminal 100, the mode state storage unit 206 reproduces the DCF file of the current state of the mobile communication terminal 100. It is divided into the DRM manager use mode, and passes a unique status flag to the microprocessor 214.

The camera unit 208 refers to an apparatus for generating image data including a still image and / or a moving image by photographing a subject, and a camera control processor 212 controlling an operation of the camera module 210 and the camera module 210. ). The camera module 210 includes an image pickup device of a Charge Coupled Device (CCD) or Complementary Metal Oxide Semiconductor (CMOS) type, and the Camera Control Processor 212 is a central processing unit. The overall operation of the controller 210 may be controlled, for example, a zoom function, a flash function, a still image shooting, and a video shooting.

The microprocessor 214 controls the overall operation of voice transmission / reception and data transmission / reception in the mobile communication terminal. In addition, the microprocessor 214 drives a DRM manager that plays a DCF file, and controls a process of decoding and playing the DCF file using the cluster file mounted in the program storage unit 204.

The digital signal processor 216 functions as an equalizer for coding or decoding a voice signal and removing multipath noise, and processes audio data and video data downloaded in the process of using the wireless Internet. A digital signal processing processor that performs a decoding function. In addition, the digital signal processor 216 exchanges speech data with the baseband converter 218 and receives digital data RX DATA from the baseband converter 218.

The baseband converter 218 converts a signal transmitted / received between the digital signal processor 216, the RF signal processor 220, the speaker 224, and the microphone 226 into a baseband band signal, and converts the digital analog signal into a digital analog signal. Performs functions such as digital to analog conversion and analog to digital conversion. The baseband converter 218 transmits the transmission data TXIQ to the RF signal processor 220, and controls the power of the RF signal processor 220 or automatically controls its gain. The RF signal processor 220 receives the received signal RFIQ.

The RF signal processor 220 demodulates and amplifies the RF signal received from the antenna 222, modulates a transmission signal applied from the baseband converter 218, and transmits the modulated signal to the propagation space. The speaker 224 outputs acoustic data transmitted from the baseband converter 218 as an audible sound, and the microphone 226 converts a user's voice input into an electrical signal.

On the other hand, the mobile communication terminal 100 according to an embodiment of the present invention is a PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) ) Phones, CDMA-2000 phones, Mobile Broadband System (MBS) phones, and the like. Here, MBS phone refers to a mobile phone to be used in the fourth generation system currently being discussed.

4 is a flowchart illustrating a process of generating a cluster file for playing a DCF file in a mobile communication terminal according to a preferred embodiment of the present invention.

In the following process, for convenience of description, it is assumed that the cluster file is generated by the personal computer 114 and transmitted to the mobile communication terminal 100. However, the present invention is not limited thereto, and the cluster is generated by the personal computer 114. Various modifications may be made by transferring the file to a mobile terminal including the mobile communication terminal 100 and another mobile communication terminal other than the mobile communication terminal 100, an MP3 player, a PMP, and the like. In addition, it is described that the DCF file is downloaded from the content providing server 114 to the personal computer 112 and then downloaded to the mobile communication terminal 100. However, the present invention is not limited thereto and the mobile communication terminal 100 provides the content. The DCF file may be downloaded and played directly through the server 112. However, it is assumed that the mobile communication terminal 100 has a cluster file.

If the user has paid a reasonable fee to the content provider, the user uses the personal computer 114 to download the DCF file from the content providing server 114. Thereafter, the user generates a cluster file necessary for playing the DCF file in the mobile communication terminal 100 through the personal computer 112.

The user connects the mobile communication terminal 100 and the personal computer 114 to each other in a wired or wireless form to generate a cluster file. The mobile communication terminal 100 and the personal computer 114 that have completed the wiring in the wired / wireless form perform a synchronization operation to initiate data communication with each other (S400).

The personal computer 114 that has completed synchronization with the mobile communication terminal 100 drives the mounted DRM manager, and the driven DRM manager reads identification information of the mobile communication terminal 100 (S402). Here, the DRM manager may receive the subscriber information of the user without reading the identification information of the mobile communication terminal 100.

Thereafter, the personal computer 114 transmits the identification information of the mobile communication terminal 100 read in cooperation with the content providing server 112 to the content providing server 112 (S404). This is called a registration process of the mobile communication terminal 100. Herein, the registration process of the mobile communication terminal 100 means that a user who pays a fair fee to a content providing service provider freely receives a DCF file in a terminal equipped with a cluster file regardless of the type of the terminal in the content providing server 112. It means the process to use.

After step S402, the personal computer 114 performs a logon process to the content providing server 112 (S406). After completing the logon process, the content providing server 112 transmits identification information of the registered mobile communication terminal 100 to the personal computer 112 (S408).

The DRM manager mounted on the personal computer 112 generates a cluster file using the identification information of the mobile communication terminal 100 provided through the content providing server 112 (S410). Thereafter, the personal computer 112 transmits the generated cluster file to the mobile communication terminal 100 (S412), and the mobile communication terminal 100 decodes the DCF file and reproduces the cluster file necessary for reproducing the program storage unit ( In step 204, it is stored.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, a user who pays a fair fee for a DCF file to a content provider includes a portable terminal including not only a mobile communication terminal but also an MP3 player, a PMP, and the like. There is also an effect that can be used universally.

Claims (10)

Creates and generates a content providing server that stores a DCF (DRM Contents Format) file encrypted using a digital right management (DRM) technique, and a cluster file required to decrypt the DCF file. A personal computer equipped with a DRM manager, which is an application that decrypts and plays the DCF file by using the cluster file, and a portable terminal that receives the cluster file from the personal computer and decrypts and plays the DCF file. In a system comprising: a method for generating a cluster file for playing a DCF file in a portable terminal, so that the terminal equipped with the cluster file can use the DCF file regardless of the type of the terminal, (a) performing data communication between the portable terminals; (b) reading identification information from the portable terminal to use the DCF file; (c) transmitting the identification information to the content providing server to register the identification information; (d) generating the cluster file which is data serving as a key for decrypting the DCF file provided from the content providing server; And (e) transmitting the cluster file to the portable terminal And generating a cluster file for playing a DCF file in a portable terminal. The method of claim 1, wherein step (a) (a1) connecting the portable terminal and the personal computer in a wired or wireless manner; And (a2) the portable terminal and the personal computer performing a synchronization operation to initiate the data communication with each other; And generating a cluster file for playing a DCF file in a portable terminal. The method of claim 1, wherein the identification information Generating a cluster file for playing a DCF file in a portable terminal, characterized in that it includes not only information including an electronic serial number (ESN) and a mobile identification number (MIN) of the portable terminal, but also subscriber information of the user. Way. The method of claim 1, wherein step (b) (b1) receiving subscriber information of the user as the identification information in addition to receiving the identification information of the portable terminal; And generating a cluster file for playing a DCF file in a portable terminal. The method of claim 1, wherein step (d) (d1) performing a logon process on the content providing server; (d2) downloading the identification information registered in the content providing server; And (d3) generating the cluster file using the downloaded identification information through the DRM manager; And generating a cluster file for playing a DCF file in a portable terminal. The method of claim 1, wherein the method is And a cluster file for playing a DCF file in a portable terminal, wherein the DCF file is applicable to at least one of a mobile communication terminal, an MP3 player, and a portable multimedia player (PMP). It is a terrestrial infrastructure that exchanges data wirelessly with a portable terminal based on a predetermined protocol, and includes handoff and wireless support management functions. The portable terminal uses a digital right management (DRM) technique. A mobile communication network that relays the DCF file to the portable terminal as a set of wireless access networks for relaying encrypted DCF (DRM Contents Format) files and a communication facility that provides voice telephone or data exchange services to an unspecified number of subscribers through an exchange. In a system comprising a, in a terminal equipped with a cluster file, so that the DCF file can be used regardless of the type of the terminal, a system for generating a cluster file for playing a DC file in a portable terminal, A content providing server storing the DCF file and providing the same through the mobile communication network and the Internet; And A personal computer which has a DRM manager as an application for generating the cluster file and generates the cluster file which is data serving as a key for decrypting the DCF file provided from the content providing server. System for generating a cluster file for playing the DC file in a portable terminal comprising a. The method of claim 7, wherein The cluster file includes an identification information unit including identification information of the portable terminal and subscriber information of a user, and a data unit including a key seed, which is random-type data used to decrypt the DCF file provided from the content providing server. And an electronic signature unit including information on an electronic signature indicating that the digital signature has been encrypted using the DRM technique. The method of claim 7, wherein The personal computer receives identification information including an electronic serial number (ESN) and a mobile identification number (MIN) from the portable terminal and registers the content providing server so that the portable terminal has the right to use the DCF file. And generating a cluster file by downloading the identification information again after performing a logon process to the content providing server after notifying that the terminal is a terminal. The method of claim 7, wherein The cluster file may be generated by receiving identification information of the portable terminal, and may be generated using subscriber information of a user including a user name, a social security number, and an e-mail account. System that generates cluster files for playback.

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