KR101432989B1 - System for providing code block for separating execution based contents, method thereof and computer recordable medium storing the method - Google Patents

Abstract

[0001] The present invention relates to a system and method for providing a code block for contents based on separation execution, a computer-readable recording medium on which the method is recorded, And to stably provide necessary storage blocks to the storage device. According to the present invention, the code blocks to be separated for execution of executable contents are provided in a storage device in a form of being included in a program for a storage device in a form of a start-up class or a later-issued class. From the host terminal connected to the storage device, a request for installing the storage device program including the detachment object code block. In the process of installing the storage device program, the storage device extracts the detachment object code block from the storage device program. Then, the separation execution target code block extracted by the storage device is stored in an execution form in the memory.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system and method for providing code blocks for contents based on separation execution, a computer-readable recording medium having recorded thereon a method,

The present invention relates to a technique for preventing copying of content, and more particularly, to a technology for preventing copying of contents by dividing a code block for execution to be separated for execution of a host terminal and a storage device An execution-based code block providing system for contents, a method thereof, and a computer-readable recording medium on which the method is recorded.

Generally, a plurality of contents are installed on an operating system of a host terminal. Content is a digital work that is stored and distributed in digital form and includes software, application programs, multimedia data, and the like. For example, the user can perform document editing, image editing, game, and the like using various contents installed in the host terminal.

Some of these contents are available for free, but they are sold on-line and off-line for a fee. The user purchases necessary contents and installs the purchased contents in the host terminal. The content is installed in the host terminal when it passes the authentication through the authentication number. The authentication number is usually provided with the purchased content.

The contents of the authentication method using the authentication number have a problem that they are easily exposed to hacking. That is, when a code capable of hacking the authentication number of the program or bypassing the authentication is added to the content, persons who have not purchased the content can install the copied content in the host terminal and use the content without permission.

The content provider (CP) is increasingly damaged by unauthorized use of such contents. The unauthorized use of the content is a factor that deteriorates the development intention of the contents provider.

In addition, since the content provider must pay attention to the security method for suppressing the unauthorized copying of the developed content, it takes a lot of cost to develop the content, which is a burden on the content provider.

It is therefore an object of the present invention to provide a method and system for separating executable content, which can provide a stable execution environment for executing execution of separation between a host terminal and a storage device, An execution-based content code block providing system, a method thereof, and a computer-readable recording medium on which the method is recorded.

It is another object of the present invention to provide a code block providing system for content-based content that can suppress a delay in signal processing speed between a server, a host terminal and a storage device in a process of providing a code block to be separated, And a computer-readable recording medium on which the method is recorded.

It is still another object of the present invention to provide a separation execution object code block in a storage device so as to provide a separation execution object code block to a storage device in a process of installing a storage device program in the storage device, A code block providing system for content-based content execution, a method thereof, and a computer-readable recording medium on which the method is recorded.

According to an aspect of the present invention, there is provided a system for providing a code block for content based on separation execution including a host terminal and a storage device. The host terminal transfers the program for the storage device including the code block for executing the execution of the executable content to the storage device connected through the communication interface. The storage device receives the program for the storage device from the host terminal, extracts the detachment object code block from the storage device program in the process of installing the received storage device program, and extracts the extracted detachment object code block in an execution form .

The present invention also provides a DRM-based DRM server including a transmission / reception unit, a database unit, and a server control unit. The transmission / reception unit communicates with the content registration server. The database unit stores a program for a storage device. The server control unit receives the execution target code block of execution content from the content registration server via the transmission / reception unit, and includes the received separation execution target code block in the storage device program.

The present invention also provides a separate execution-based storage device including a storage section, a communication interface section, a program processing section for a storage device, and a code block processing section for executing a separation. The communication interface unit communicates with the host terminal, and receives a request to install a program for a storage device that contains a code block to be executed for executing executable content from the host terminal. The program processing unit for the storage device receives the installation request from the communication interface unit and extracts the code block to be separated from the program for the storage device in the process of installing the program for the storage device including the code block for execution of the executable content. The separation execution object code block processing unit receives the separation execution object code block extracted from the storage device program processing unit and stores it in the storage unit in an execution form.

In the storage-based storage device according to the present invention, the communication interface unit may receive a program for a storage device including a code block to be executed for executing executable content from the host terminal, and transfer the program to the program processing unit for the storage device.

In the storage-based storage device according to the present invention, a program for a storage device including a code block to be separated for execution of executable content is stored in the storage unit.

In the storage-based storage device according to the present invention, when the storage device program is connected to the host terminal through the communication interface unit, the program processing unit for storage device inquires of the host terminal whether or not to install the stored storage device program, Upon receipt of the request, the detachment object code block can be extracted from the pre-stored storage device program.

The present invention also relates to a method comprising: a receiving step of receiving an installation request for a storage device program including a code block to be executed for executing executable content from a host terminal connected to the storage device; An extraction step of extracting a separation execution object code block in a storage device program, and a storage step of storing a separation execution object code block extracted by the storage device in an execution form.

In the method of providing a code block for content based on separation execution according to the present invention, in a receiving step, a storage device containing a code block to be separated for executing executable content may be received from a host terminal connected to the storage device .

In the method of providing a code block for contents based on separation execution according to the present invention, when a storage device is connected to a host terminal, which is performed before a receiving step, whether a code block to be separated for execution content stored in the storage device is installed To the host terminal. At this time, in the receiving step, the storage device can receive the installation request from the host terminal in response to the inquiry.

A method of providing a code block for content based on separation execution according to the present invention is characterized by comprising the steps of: And a calling step of receiving a call request message.

In the method of providing a code block for content based on separation execution according to the present invention, the storing step may include: checking whether the capacity of the remaining memory is sufficient to store the code block to be separated, extracted by the storage device; And storing the detachment execution target code block extracted by the device in an execution form in a memory.

In the method of providing a code block for contents based on separation execution according to the present invention, when the storage device receives an insufficient memory message from the host terminal, A step of securing a memory capacity, and a step of storing a code block to be separated for execution extracted by the storage device in an execution form in a memory.

In the method of providing a code block for contents based on separation execution according to the present invention, the memory reservation request message may include a deletion request message for information stored in the storage device.

In the method of providing a code block for contents based on a separation execution according to the present invention, the memory reservation request message may include a deletion request message of a program for a storage device corresponding to a storage device to be installed.

In the method of providing a code block for contents based on separation execution according to the present invention, a program for a storage device may include a program for installing or updating.

In the method of providing a code block for content based on separation execution according to the present invention, the code block to be separated is converted into a code block for a storage device executable in the storage device.

In the method of providing a code block for contents based on separation execution according to the present invention, when a storage device is based on a Java Card Platform, a program for a storage device is an applet, Is converted into a Java Byte code block or a code block for ARM.

The present invention also provides a computer-readable recording medium having recorded thereon a method for providing code blocks for contents based on the above-described separation execution.

Therefore, according to the present invention, it is possible to provide a storage-purpose program block including a detachment-target code block capable of providing a stable execution environment when the host terminal and the storage device execute separate execution of executable-type content.

Since the detachment execution target code block included in the program for the storage device can be stored separately in the memory in the process of installing the program for the storage device, in the process of providing the detachment object code block to the storage device It is possible to suppress the problem that the signal processing speed between the server, the host terminal, and the storage device is delayed. That is, although the code block to be separated is provided as a program for a storage device, it is provided in the storage device in binary code form instead of a program form. Therefore, in the process of storing the code block to be detached, Can be suppressed.

1 is a block diagram illustrating a digital rights management (DRM) system including a system for providing code blocks for content based on a separation execution according to an embodiment of the present invention.
2 is a block diagram showing the data structure of executable content.
Fig. 3 is a block diagram showing a configuration of a code block for separation execution and a content for service divided in execution-type content; Fig.
4 is a block diagram illustrating a configuration of the DRM server of FIG.
5 is a block diagram illustrating the configuration of the content distribution server of FIG.
6 is a block diagram showing the configuration of the host terminal of FIG.
FIG. 7 is a block diagram showing the configuration of the storage device of FIG. 1; FIG.
FIG. 8 is a flowchart illustrating a method of providing a code block for contents based on separation execution according to an embodiment of the present invention.
FIG. 9 is a detailed flowchart according to the step of storing the code block for separation execution in FIG.
10 is a flowchart illustrating another example of a method of providing a code block for content based on separation execution according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, the executable content may be content that can be executed by a host terminal or a storage device having a processor, for example, an application program, a game program, and various software.

The digital rights management (DRM) system 100 according to the embodiment of the present invention may include a content providing terminal 100 connected via a network 60, 10, a content registration server 20, a DRM server 40, a content distribution server 50, a host terminal 70, and a storage device 80 connected to the host terminal 70 via a communication interface 90, . In particular, the DRM system 100 based on the separation execution includes a code block providing system for providing the separation execution object code block 34 to the storage device 80. [ The code block providing system comprises a host terminal 70 and a storage device 80.

Here, 'separate execution' means that the host terminal 70 and the storage device 80 operate in conjunction with each other in executing the executable content 30. [ Particularly, in order to realize separation execution, some code blocks (hereinafter, referred to as 'separation execution subject code blocks 34') separated from the code area 31 of the original executive content 30 are installed in the storage device 80 Executable content (hereinafter, referred to as "service content 32") from which the code block for separation execution 34 has been removed is installed in the host terminal 70. Therefore, when executing the execution-based execution-based content 30, the host terminal 70 stores the output value for the portion from which the separation-target code block 34 is removed during execution of the service content 32, (80), and executes the corresponding executable content (30) in the form of being returned. At this time, the separation execution target code block 34 may be converted into a code block used in the storage device 80 and provided to the storage device 80.

The network 60 includes a series of data transmission and reception operations for data transmission and information exchange between the content providing terminal 10, the content registration server 20, the DRM server 40, the content distribution server 50 and the host terminal 70 . The network 60 may be an IP network that provides high-capacity data transmission / reception services and seamless data services through IP, and may be an ALL-IP network that is an IP network structure in which different networks are integrated based on IP. Also, the network 60 includes a wired communication network, a mobile communication network, a wireless broadband (WiBro) network, a high-speed downlink packet access (HSDPA) network, a satellite communication network or other well-known or future wired or wireless networks.

The content providing terminal 10 communicates with the content registration server 20 via the network 60 as a terminal operated by the content provider and stores the executable content 30 developed by the content provider.

The content registration server 20 communicates with the content providing terminal 10 and the DRM server 40 via the network 60. The content registration server 20 receives and registers the executive content 30 from the content providing terminal 10 at the request of the content provider through the network 60. [ At this time, the content registration server 20 separates the executable content 30 into the service content 32 and the separation execution target code block 34 and registers them. At this time, the separation of the executive content 30 may be performed in the content providing terminal 10 or in the content registration server 20.

The DRM server 40 communicates with the content registration server 20 and the content distribution server 50 via the network 60. The DRM server 40 applies DRM to the service content 32 and the separation execution object code block 34 received from the content registration server 20. [ The DRM server 40 can acquire necessary information such as service content 32 to which DRM is applied according to a purchase request for the user's specific executive content 30 through the content distribution server 50, And a right object 42 to the content distribution server 50. [ In other words, the DRM server 40 encrypts the service contents 32 with a content encryption key (CEK), formats the content 32 using a DRM protected content format (DCF), and stores the content. The DRM server 40 transmits the DCF of the executive content 30 to the content distribution server 50 and encrypts the CEK with the user's private key to obtain the rights object 42 And transmits it to the content distribution server 50. In particular, the DRM server 40 may include the separation execution object code block 34 in the storage device program 52 and provide it to the content distribution server 50. [

The content distribution server 50 communicates with the DRM server 40 and the host terminal 70 via the network 60. [ The content distribution server 50 delivers the purchase request for the user's specific executive content 30 to the DRM server 40 and extracts the service content 32 to which the DRM is applied for the executable content 30, The execution object code block 34 and the rights object 42 from the DRM server 40. [ At this time, the separation execution object code block 34 may be provided in a form included in the storage device program 52. [

The communication interface 90 performs a series of data transmission / reception operations for data transmission and information exchange between the host terminal 70 and the storage device 80 which are close to each other. The communication interface 90 may include a wired communication network using a USB, a USB2, a serial / parallel port, an Ethernet, a TCP / IP, a communication cable, and a short-range wireless communication network. Bluetooth, Zigbee, Ruby, Infrared Data Association (IrDA), and Ultra Wide Broadband (UWB) may be used as the short-range wireless communication method.

The host terminal 70 communicates with the content distribution server 50 via the network 60 and communicates with the storage device 80 via the communication interface 90. [ The host terminal 70 receives the purchase request for the specific executive content 30 according to the user's selection signal and transmits the purchase request to the content distribution server 50. The host terminal 70 receives the service content 32, the rights object 42 and the storage device program 52 to which DRM is applied for the executive content 30 purchased from the content distribution server 50. [ The host terminal 70 installs the service content 32 in the received information. The host terminal 70 transfers the right object 42 and the storage device program 52 among the received information to the storage device 80. At this time, the host terminal 70 collectively refers to a computing device having an independent CPU capable of executing the executable contents 30, such as a PC, a notebook, and a workstation. The host terminal 70 may include a public computer that is accessible by a plurality of users.

The storage device 80 is connected to the host terminal 70 via the communication interface 90 and is connected to the storage device 80 through a storage device program 52 required for driving the storage device 80, And the right object 42 for the contents 32 to be separated. The storage device 80 performs an operation on the detachment object code block 34 and returns an output value to the host terminal 70 in response to a request from the host terminal 70 when the executable content 30 is executed. Particularly, in the case where the storage device 80 is provided in the form of the program included in the storage device program 52, when the program 52 for the storage device is installed, the corresponding code block 34 ) Can be extracted and stored in the memory. The program 52 for the storage device including the detachment object code block 34 may be provided in a form stored in the storage device 80 as a starter charge or may be provided to the storage device 80 from the host terminal 70 . The storage device 80 may be a storage device having a processor, such as a USB memory, a flash memory card, various removable and portable storage media such as a SD (Secure Digital) memory card, a microSD memory card, Storage devices, etc.).

In this way, when the storage device 80 is connected to the host terminal 70 via the communication interface 90, the user can access the executable content (for example, a keyboard, a mouse, a touch pad, 30), the host terminal 70 starts execution for the service contents 32. In this case, The host terminal 70 delivers the execution request for the code not contained in the service content 32 to the storage device 80. [ Then, the storage device 80 executes the separation execution subject code block 34 corresponding to the execution request, and then transfers the output value to the host terminal 70. [

In particular, the code block providing system according to the present invention includes a host terminal 70 and a storage device 80 connected via a communication interface 90, and may further include a content distribution server 50 .

The content distribution server 50 receives from the DRM server 40 a program 52 for a storage device including the detachment object code block 34 and transfers the program 52 to the host terminal 70. [ At this time, the example of the program 52 for the storage device is received from the DRM server 40, but the present invention is not limited thereto. The content distribution server 50 may receive the detachment object code block 34 from the DRM server 40 and include the received detachment object code block 34 in the storage device program 52. [

The host terminal 70 receives the storage device program 52 including the separation execution object code block 34 from the content distribution server 50. [ The host terminal 70 transmits the program 52 for the storage device to the storage device 80 connected via the communication interface 90. [

The storage device 80 receives the program 52 for the storage device from the host terminal 70. The storage device 80 extracts the detachment object code block 34 from the storage device program 52 in the process of installing the received storage device program 52. [ Then, the storage device 80 stores the extracted separation execution object code block 34 in the memory. At this time, the storage device 80 may store the extracted separation execution object code block 34 in an execution form in a memory.

As described above, the code block providing system according to the present embodiment includes a code block 34 (which is capable of providing a stable execution environment when executing separation between the host terminal 70 and the storage device 80 for the executable content 30) May be included in the storage device program 52 and provided to the storage device 80. [

Since the detachment execution target code block 34 provided in the storage device program 52 can be extracted in the process of installing the storage device program 52 and stored in the memory in an executable form, The problem of delaying the signal processing speed between the host terminal 70 and the storage device 80 in the process of providing the block 34 to the storage device 80 can be suppressed.

Before describing the code block providing system according to the present embodiment as such, the execution-based execution content 30 based on the separation execution will be described with reference to FIG. 1 to FIG.

The executable content 30 includes a plurality of files, for example, an application program interface (API) provided by an operating system, an API provided by a developer, or a dynamic linking library (DLL). The executable content 30 including such a plurality of files can be divided into a code area 31 and a data area 33 as shown in FIG. The code region 31 includes a plurality of code blocks, and the separation execution object code block 34 includes a plurality of code blocks extracted from the code region 31. For example, the detachment object code block 34 includes a plurality of basic block groups 37, and the basic block group 37 is a group of a plurality of basic blocks 35. [

At this time, the basic block 35 is a sequence of instructions having attributes of a single input and a single output, and is a code block having attributes that do not allow entry from the outside to the inside Can be defined. That is, the basic block 35 is a continuous sentence (a group of codes) which is executed all at once from start to end, and is a group of sentences whose execution is not stopped due to the flow control in the middle.

The service content 32 includes a code area 31a in which a stub code 36 is inserted in a code area of the basic block group 37 extracted by the separation executing object code block 34 and a data area 33 do. At this time, the stub code 36 has a code area extracted from the service content 32 and a code area extracted from the extracted code area 30 when performing the separation execution of the executable content 30 between the host terminal 70 and the storage device 80. [ To-be-separated-execution-target code block 34 corresponding to the program code. That is, the stub code 36 transfers the control signal from the extracted code area to the storage device 80 when executing the separate execution for the executive content 30. [ The storage device 80 having received the control signal performs an operation on the separation execution object code block 34 corresponding to the control signal and returns the calculated output value to the host terminal 70.

The separation execution subject code block 34 includes a plurality of basic block groups 37 extracted from the code area 31 of the executive content 30 through profiling and analysis of the executive contents 30. [ That is, the separation execution target code block 34 performs the profiling and analysis of the executive content 30 to select the basic block group 37 in the code area 31 of the executive content 30, At least one of the block groups 37 may be extracted into the separation execution object code block 34. [ A stub code 36 is inserted in the part where the separation execution object code block 34 is extracted. As will be described later, through the profiling and analysis of the executable content 30, the executable content 30 includes a separation execution target code block 34, a service content 32 from which the separation execution target code block 34 is extracted ).

The detachment target code block 34 may be converted into a code block for a storage device and provided in a form stored in the storage device 80 or in a form of a download in the storage device 80. [ The separation execution object code block 34 is a basic block group 37 including a plurality of basic blocks 35 as described above. The separation execution subject code block 34 permits the entry of the control signal through the entry point of the separation execution subject code block 34 and the movement of the control signal between the basic blocks 35, It is preferable to select the basic block group 37 including a plurality of mutually related basic blocks 35 without entry of the control signal into the basic block 35 excluding the starting point of the basic block 35. [

When extracting the basic block group 37 having the control signal into the basic block 35 excluding the starting point from the basic block group 37 with the separation execution object code block 34, The control signal may enter the stub code 36 inserted after extracting the block 34 in the middle rather than the beginning. In this case, the stub code 36 can not perform the process for the corresponding control signal, so execution of the corresponding executive content 30 may be stopped or an error may occur. That is, since the stub code 36 includes a garbage value such as NOP (no-operation instruction) in the remaining area except for the first 5 bytes, an error may occur when the control signal enters the area containing the garbage value. In other words, since the basic block group 37 having the control signal input to the basic block 35 excluding the starting point has a high probability of generating an error when performing the separation execution, 34).

1 to 4, the DRM server 40 of the code block providing system according to the present embodiment includes a first transmission / reception unit 41, a first database unit 43, and a first server control unit 45 ).

The first transmission / reception unit 41 communicates with the content registration server 20 and the content distribution server 50 via the network 60. The first transmission / reception unit 41 receives the separation execution object code block 34 and the service contents 32 from the contents registration server 20. [ The first transmission and reception unit 41 transmits the content 32 for the service to which the DRM is applied to the content distribution server 50, the storage device program 52 including the separation execution object code block 34, and the rights object 42 send.

The first database unit 43 stores the service content 32, the separation execution object code block 34, and the storage device program 52. At this time, the service contents 32 may be converted into the DCF format and stored in the first database unit 43. The program 52 for the storage device may include a separation execution object code block 34. [

At this time, the storage device program 52 includes a program for installing or updating. For example, if the storage device 80 is a smart card, the program 52 for the storage device may be an applet.

The separation execution subject code block 34 is a code block extracted from the executable contents 30 executed in the host terminal 70. [ For example, the separation execution object code block 34 may be a code block extracted from the code area 31 of the executable contents 30 for x86 or x64. Therefore, the separation execution object code block 34 is converted into a code format that can be used in the storage device 80. [ For example, when the storage device 80 is a smart card, the separation executing object code block 34 is converted into a Java Byte code block or an ARM code block. The detachment target code block 34 may be included in a rights object or an applet and provided to the smart card. In this embodiment, an example has been described in which the code block 34 for separation execution is included in a program 52 for a storage device such as an applet.

The first server control unit 45 performs the overall control operation of the DRM server 40. [ That is, the first server control unit 45 applies the DRM to the service content 32 and the separation execution object code block 34 received from the content registration server 20. [ The first server control unit 45 can encrypt the service content 32 with the CEK, format it with the DCF, and store it in the first database unit 43. The first server control unit 45 controls the contents server 32 to execute DRM according to the purchase request for the user's specific executive content 30 through the content distribution server 50, And transmits the rights object 42 to the content distribution server 50. At this time, the DRM server 40 encrypts the CEK with the user's private key to generate the rights object 42 and transmits the rights object 42 to the content distribution server 50.

Also, the first server control section 45 includes the separation execution object code block 34 in the storage device program 52 and transfers it to the content distribution server 50. [ At this time, the first server control unit 45 may transmit the storage device program 52 including the separation execution object code block 34 according to the purchase request of the user.

1 to 3 and 5, the content distribution server 50 of the code block providing system according to the present embodiment includes a second transmission / reception unit 51, a second database unit 53, and a second And a server control unit 55.

The second transceiver 51 communicates with the DRM server 40 and the host terminal 70 via the network 60. [ The second transceiver unit 51 receives the purchase request for the specific executive content 30 from the host terminal 70 under the control of the second server control unit 55 and transfers the purchase request to the DRM server 40. [ The second transceiver 51 receives the DRM applied service content 32, the rights object 42 and the storage device program 52 from the DRM server 40 under the control of the second server control unit 55 And transmits it to the host terminal 70. The second transceiver 51 receives the storage program 52 including the detachment object code block 34 from the DRM server 40 and transfers the program 52 to the host terminal 70. [

The second database unit 53 may store the service content 32, the rights object 42 and the storage device program 52 for delivery to the host terminal 70. [

The second server control unit 55 performs an overall control operation of the content distribution server 50. The second server control unit 55 receives the purchase request for the user's specific executive content 30 from the host terminal 70 via the second transceiver 51 and transfers the purchase request to the DRM server 40. [ The second server control unit 55 receives the service content 32, the rights object 42 and the storage device program 52 to which DRM is applied for the executive content 30 through the second transmission / And transmits it to the host terminal 70.

1 to 3 and 6, the host terminal 70 of the code block providing system according to the present embodiment includes a communication unit 71, an input unit 73, a first storage unit 75, 1 communication interface unit 77, a display unit 78, and a first control unit 79, as shown in FIG.

The communication unit 71 communicates with the content distribution server 50 via the network 60. The communication unit 71 transmits a purchase request for the specific executive content 30 to the content distribution server 50 under the control of the first control unit 79. The communication unit 71 receives the service content 32, the rights object 42 and the storage device program 52 to which DRM is applied from the content distribution server 50 and transfers the received content 32 to the first control unit 79.

The input unit 73 provides a plurality of keys for operating the host terminal 70 and generates a selection signal according to the user's selection of the key and transmits the selection signal to the first control unit 79. The user requests purchase of the executive content 30 through the input unit 73 and stores the rights object 42 and the separation execution subject code block 34 of the purchased executive content 30 in the storage device 80 A selection signal for requesting installation can be input. The input unit 73 may be an input device such as a keypad, a pointing device such as a touch pad, or a touch screen.

The first storage unit 75 stores a program necessary for controlling the operation of the host terminal 70 and information generated during the execution of the program. The first storage unit 75 stores an execution program for installing the executable content 30 based on the separation execution. Particularly, the first storage unit 75 stores the service content 32 received from the content distribution server 50.

The first communication interface 77 communicates with the storage device 80 via the communication interface 90. The first communication interface unit 77 controls the storage device 80 to store the program 52 for the storage device including the rights object 42 and the separation execution object code block 34 under the control of the first control unit 79 send. The first communication interface unit 77 requests the storage device 80 to request the CEK for decrypting the DRM-applied service content 32 under the control of the first control unit 79 and receives the request. The first communication interface unit (77) mediates the connection between the service content (32) and the separation execution object code block (34) when executing the separation execution based content.

The display unit 78 can display information stored in the first storage unit 75 as well as various function menus executed by the host terminal 70. [ The display unit 78 can display information necessary for installing the content 30 based on the separation execution. For example, the display unit 78 may display a message inquiring whether or not the storage device program 52 is installed. The display unit 78 can display a memory short message received from the storage device 80 during the installation of the storage device program 52. [ The display unit 78 may be a liquid crystal display (LCD) or a touch screen. The touch screen serves both as a display device and as an input device.

The first control unit 79 is a microprocessor that performs an overall control operation of the host terminal 70. In particular, the first control unit 79 controls the installation of the execution-based content 30 based on the separation execution. That is, the first control unit 79 decrypts and installs the service content 32 to which the DRM is applied. The first control unit 79 installs the rights object 42 in the storage device 80. The first control unit 79 performs execution of the executable content 30 based on the separation execution together with the storage device 80.

Particularly, when the user purchases the executive content 30 through the content distribution server 50, the first control unit 79 distributes the program 52 for the storage device, which includes the separation execution object code block 34, From the server 50 and delivers it to the storage device 80. Or the storage device program 52 in which the separation execution object code block 34 is included is stored in the purchased storage device 80, the first control unit 79 reads the storage device program 52 from the storage device 80 It is possible to receive a message inquiring whether or not the program 52 is installed and to request installation of the program 52 for the storage device in response thereto. In this case, the former is a case in which the code block 34 for separation execution is provided to the storage device 80 in a post-issuance form, and the latter is a case in which the code block 34 for separation execution is provided in the storage device 80 in a pre- to be.

1 to 3 and 7, the storage device 80 of the code block providing system according to the present embodiment includes a second communication interface unit 81, a second storage unit 83, and a second And a control unit 85.

The second communication interface unit 81 is connected to the host terminal 70 via the communication interface 90 and communicates with the host terminal 70. The second communication interface unit 81 receives the installation request of the storage device program 52 including the detachment object code block 34 from the host terminal 70 and transfers the request to the second control unit 85. [ The second communication interface unit 81 receives the storage device program 52 including the rights object 42 and the separation execution object code block 34 from the host terminal 70 and transmits the same to the second control unit 85 do.

The second storage unit 83 stores a program necessary for controlling the operation of the storage device 80 and information generated during the execution of the program. The second storage unit 83 stores an execution program for installing the received right object. The second storage unit 83 is also provided with the storage device program 52 installed in the storage device 80 and the storage device program 52 including the detachment object code block 34, And an execution program for extracting the program 34 and storing it in an execution form. The second storage unit 83 stores the rights object 42, the program for the storage device 52, and the separation execution object code block 34. [ At this time, the separation execution target code block 34 may be stored in the NOR or NAND memory in an execution form. The storage device program 52 including the detachment execution object code block 34 may be provided in a form pre-stored in the second storage unit 83 in the form of a starter charge or may be provided in the form of a post- have.

The second control unit 85 is a microprocessor that performs the overall control operation of the storage device 80. The second control unit 85 extracts the separation execution object code block 34 from the storage device program 52 including the separation execution object code block 34 and stores the separation execution object code block 34 in the execution form in the second storage unit 83 Lt; / RTI >

The second control unit 83 includes a DRM processing unit 82, a storage device program processing unit 84, and a separation execution object code block processing unit 86.

The DRM processing unit 82 receives the rights object 42 from the host terminal 70 and stores the rights object 42 in the second storage unit 83. The DRM processing unit 82 decodes the CEK from the right object 42 for decoding the service content 32 to which the DRM is applied and transmits the decoded CEK to the host terminal 70 at the request of the host terminal 70. [ The DRM processing unit 82 also plays a role of installing a user's private key. The installation of the private key is performed only for the first time after purchasing the storage device 80. If the private key is subsequently updated, all the rights objects 42 stored in the storage device 80 may be invalidated.

The program processing unit 84 for the storage device controls the installation of the program 52 for the storage device. Particularly, the program processing unit 84 for storage device extracts the block to be detached from the storage device program 52 in the process of installing the storage device program 52 including the detachment object code block 34 And transmits it to the separation execution object code block processing unit 86. [ For example, when the storage device 80 is a smart card, the storage device program processing unit 84 can be constructed based on a Java Card Platform. The program 52 for the storage device is an applet used in the Java card platform. The separation execution object code block 34 is converted into a Java Byte code block or an ARM code block.

The separation execution object code block processing section 86 stores the separation execution object code block 34 in the execution form and returns the resultant value calculated through the execution of the separation execution object code block 34 to the host terminal 70 do. That is, the separation executing object code block 34 extracted from the storage device program processing section 84, and stores the same in the second storing section 83 in an execution form. At this time, when the separation execution target code block processing section 86 receives the request for the result value of the specific separation execution object code block 34 from the host terminal 70, the separation execution execution code block processing section 86 links the separation execution object code block 34 to the runtime And then returns to the host terminal 70. The host terminal 70 then sends the result to the host terminal 70,

On the other hand, the storage device program 52 including the separation execution object code block 34 may be provided from the host terminal 70 to the storage device 80 in a later issued form. In this case, the second control unit 85 may store the separation execution object code block 34 in the second storage unit 83 as follows. When the storage device 80 is connected to the host terminal 70, the storage device program processing section 84 stores the code block 34 of the executable content 30, which is purchased from the host terminal 70, And receives the program 52 for storage device through the second communication interface unit 81. The program processing unit 84 for a storage device executes a process for installing the storage device program 52 including the received detachment object code block 34 in the storage device program 52, And transmits it to the separation execution object code block processing unit 86. [ The separation execution object code block processing unit 86 stores the received separation execution object code block 34 in the second storage unit 83 in an execution form.

At this time, when the separation execution object code block 34 is stored in the second storage unit 83, the separation execution object code block processing unit 86 determines whether or not the remaining memory capacity enough to store the separation execution object code block 34 is sufficient . When the confirmation result is sufficient, the separation execution object code block processing section 86 stores the separation execution object code block 34 in the execution form in the memory.

However, if the verification result is insufficient, the separation execution object code block processing unit 86 transmits a memory short message to the host terminal 70 via the second communication interface unit 81. [ Upon reception of the memory reservation request message from the host terminal 70, the program processing unit 84 for storage device reserves a memory capacity insufficient. Then, the separation execution object code block processing section 86 stores the separation execution object code block 34 in an execution form in a memory. At this time, the memory reservation request message may be a deletion request message for specific information according to the user's selection signal among the information stored in the second storage unit 83. [ Or the memory reservation request message may be a deletion request message of a program for the stored storage corresponding to the program 52 for the storage device to be installed.

Next, the storage device program 52 including the detachment execution target code block 34 may be provided in a pre-stored form in the second storage unit 83 in a pre-stored form. In this case, the second control unit 85 may store the separation execution object code block 34 in the second storage unit 83 as follows.

When the storage device 80 connects to the host terminal 70, the storage device program processing section 84 stores the storage device program 52 including the detachment object code block 34 previously stored in the host terminal 70 And transmits a message inquiring whether or not it is installed. When the program processing unit 84 for storage device receives a request for installation of the program 52 for storage device in response to a query from the host terminal 70, the program for storage device containing the detachment object code block 34 52 from the program 52 for storage device, and transfers the code block to the separation execution object code block processing unit 86. [ The separation execution object code block processing unit 86 stores the received separation execution object code block 34 in the second storage unit 83 in an execution form.

An example of a method of providing a code block for content based on separation execution according to an embodiment of the present invention will be described with reference to FIG. 1 to FIG. Here, FIG. 8 is a flowchart illustrating a method of providing a code block for content based on separation execution according to an embodiment of the present invention. And FIG. 9 is a detailed flowchart according to the step of storing the separation execution object code block of FIG.

One example of the method of providing a code block according to the present embodiment is such that a program 52 for a storage device including a detachment object code block 34 is provided from the host terminal 70 to the storage device 80 in a later issued form .

First, in step S101, the content registration server 20 transmits the service content 32 of the registered executable content 30 and the separation execution object code block 34 to the DRM server 40. [ The DRM server 40 applies DRM to the received service content 32 and the separation execution object code block 34. [ For example, the DRM server 40 encrypts the service content 32 with the CEK, formats it with the DCF, and stores it.

In step S103, the storage device 80 is connected to the host terminal 70 via the communication interface 90. In step S105, the host terminal 70 transmits the specific executive content ( 30). That is, when the host terminal 70 accesses the content distribution server 50 via the network 60, the content distribution server 50 provides the host terminal 70 with a list of the purchasable executable content 30 . The host terminal 70 displays a list of the received executive content 30 on the screen and transmits the purchase request for the specific executive content 30 to the content distribution server 50.

Next, in step S107, the content distribution server 50 delivers a purchase request for the specific executive content 30 to the DRM server 40. [

Then, in step S109, the DRM server 40 generates a storage device program 52 including the code block 34 for separation execution of the purchase-requested execution content 30. Then, in step S111, the DRM server 40 transmits the generated storage device program 52 to the content distribution server 50. [ At this time, in step S109, the DRM server 40 encrypts the CEK with the user's private key to generate the rights object 42. [ In step S111, the DRM server 40 transmits the service content 32 and the rights object 42 to which the DRM is applied together with the generated storage device program 52 to the content distribution server 50

Next, in step S113, the content distribution server 50 transmits the received storage program 52, the service content 32 to which the DRM is applied, and the rights object 42 to the host terminal 70.

Next, in step S115, the host terminal 70 transmits the received storage device program 52 to the storage device 80. [ At this time, the host terminal 70 may request the installation for the storage device program 52 including the separation execution object code block 34 together. In addition, the host terminal 70 transmits the rights object 42 to the storage device 80.

Then, in step S117, the storage device 80 installs the received storage device program 52, and extracts the separation execution object code block 34 from the storage device program 52 in the course of installation (S119). At this time, the storage device 80 stores the received right object 42 in the memory.

In step S121, the storage device 80 stores the extraction execution target code block 34 in the memory. The step S121 will now be described with reference to FIG.

First, in step S123, the storage device 80 confirms whether or not the capacity of the remaining memory sufficient to store the extracted separation execution object code block 34 is sufficient.

If the result of the check in step S123 is sufficient, in step S131, the storage device 80 stores the extracted separation execution object code block 34 in an execution form in the memory.

However, if the result of step S123 is insufficient, the storage device 80 transmits a memory short message to the host terminal 70 in step S125. Next, in step S127, the host terminal 70 transmits a memory reservation request message to the storage device 80 in response to the memory shortage message. At this time, the memory reservation request message may be a deletion request message of specific information according to the user's selection signal among the information stored in the storage device 80. [ Or the memory reservation request message may be a deletion request message of a program for the stored storage corresponding to the program 52 for the storage device to be installed.

Next, in step S129, the storage device 80 secures the insufficient memory capacity according to the received memory reservation request message.

In step S131, the storage device 80 stores the extracted execution object code block 34 in an executable form in the memory when the memory capacity is secured enough to store the extraction execution object code block 34 extracted in step S129.

On the other hand, when the DRM server 50 receives the execution content purchase request in step S107, the DRM server 50 determines whether to store the code block including the separation execution target code block 34 An example of generating the program 52 for the apparatus has been described, but the present invention is not limited thereto. For example, if the DRM server 50 receives the detachment object code block 34 from the content registration server 20, the DRM server 50 can perform step S109 before step S107.

In step S111, the content distribution server 50 has received an example of receiving the storage device program 52 from the DRM server 40. However, the present invention is not limited to this. The content distribution server 50 may receive the detachment object code block 34 from the DRM server 40 and include the received detachment object code block 34 in the storage device program 52. [

In this embodiment, the example in which the host terminal 70 according to step S103 is connected to the storage device 80 performs steps S105 to S113 has been described, but the present invention is not limited thereto. For example, the host terminal 70 may perform steps S105 to S113 without the storage device 80 being connected. If the storage device 80 is connected to the host terminal 70 after step S113, the host terminal 70 and the storage device 80 may perform steps S115 to S121 in conjunction with each other.

Another example of a method of providing a code block for content based on separation execution according to an embodiment of the present invention will be described with reference to FIG. 1 to FIG. Here, FIG. 10 is a flowchart illustrating another example of a method of providing a code block for contents based on separation execution according to an embodiment of the present invention.

Another example of the code block providing method according to the present embodiment is a case in which the storage device program 52 including the separation execution object code block 34 is provided to the storage device 80 in the form of a starter class.

When the storage device 80 in which the storage device program 52 including the detachment object code block 34 is stored is connected to the host terminal 70 in step S102, The terminal 70 inquires whether or not to install the storage device program 52 including the separation execution object code block 34. [

Next, in step S106, the host terminal 70 requests the storage device 80 to install the storage device program 52 in response to the inquiry.

Then, steps S117 to S121 are performed to store the separation execution target code block 34 in the memory in an execution form in the storage device 80. [ Since steps S117 to S121 are the same as those of FIGS. 8 and 9, detailed description thereof will be omitted.

The method of providing a code block for content based on the separation execution according to the present embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable recording medium. The recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on a recording medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. For example, the recording medium may be a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical medium such as a CD-ROM or a DVD, a magneto-optical medium such as a floppy disk magneto-optical media, and hardware devices that are specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such a hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

It should be noted that the embodiments disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

The present invention relates to a system for providing a code block for content based on separation, a method thereof, and a computer-readable recording medium on which the method is recorded. A signal processing speed between a server, a host terminal, and a storage device is reduced in a process of providing a code block for separation execution to a storage device, The problem of delay can be suppressed.

10: Content providing terminal 20: Content registration server
30: Executable content 32: Content for service
34: separation execution target code block 40: DRM server
42: right object 50: content distribution server
52: program for storage device 60: network
70: Host terminal 80: Storage device
100: Digital rights management system based on separation execution

Claims (18)

A host terminal for transmitting a program for a storage device including a code block for executing execution of executable content to a storage device connected via a communication interface;
Extracting the detachment object code block from the storage device program in the course of installing the received storage device program, executing the extracted detachment object code block A storage device for storing in the form of;
And generating a code block for a content based on the extracted code block. A database unit for storing a program for a storage device;
A transmitting / receiving unit for communicating with the content registration server;
A server control unit for receiving a code block to be separated from execution content from the content registration server through the transceiver unit and including the received code block to be separated for execution in the storage device program;
Wherein the DRM server comprises: A storage unit;
A communication interface for communicating with a host terminal and receiving a request for installing a program for a storage device including a code block for executing execution of executable content from the host terminal;
A storage device that receives the installation request from the communication interface unit and extracts the detachment object code block from the storage device program in a process of installing a program for a storage device including a code block to execute detachment of the executable content; ;
A separation execution object code block processing unit for receiving the extracted separation execution object code block from the storage device program processing unit and storing it in the storage unit in an execution form;
And a storage unit that stores the execution information. The method of claim 3,
Wherein the communication interface unit receives a program for a storage device including the code block to be separated from the executable content from the host terminal and transfers the program to the program processor for storage device. The method of claim 3,
Wherein the storage unit stores a program for a storage device including a code block to be separated for execution of the executable content. 6. The method of claim 5,
Wherein the program processing unit for the storage device inquires of the host terminal whether or not the pre-stored storage device program is installed when the host computer accesses the host terminal through the communication interface unit, and upon receiving the installation request in response to the inquiry, And the extraction execution object code block is extracted from the program for the storage device. A method for providing a code block for content based on separation execution,
A receiving step of receiving from the host terminal connected to the storage device an installation request of a program for a storage device including an execution object code block for execution content;
An extraction step of extracting the separation execution object code block from the storage device program in the process of installing the storage device program by the storage device;
A storage step of storing the extraction execution target code block extracted by the storage device in an execution form;
And generating a code block for a content based on the extracted execution code. 8. The method of claim 7, wherein in the receiving step,
Wherein the storage device receives a program for a storage device including a code block to be separated from the executable content from a host terminal connected to the storage device. 8. The method of claim 7, further comprising:
The method comprising the steps of: when the storage device is connected to a host terminal, inquiring of the host terminal whether or not to install a code block to execute separation of executable content previously stored in the storage device;
Further comprising:
Wherein in the receiving step, the storage device receives an installation request from the host terminal in response to the inquiry. 10. The method of claim 9, further comprising:
A calling step in which the storage device calls a program for a storage device including a code block for executing a separately executed executable content;
The method of claim 1, further comprising: 8. The method of claim 7,
Confirming that the storage device has a sufficient capacity of the remaining memory to store the extracted execution execution target code block;
Storing the extracted execution object code block in an execution form in the memory when the verification result is satisfactory;
And generating a code block for a content based on the extracted execution code. 12. The method of claim 11,
If the result of the check is insufficient, the storage device transmits an out-of-memory message to the host terminal;
The storage device receiving a memory reservation request message from the host terminal to secure a memory capacity insufficient;
Storing the extracted execution object code block in an execution form in the memory by the storage device;
The method of claim 1, further comprising: 13. The method of claim 12,
Wherein the memory reservation request message includes a deletion request message for information stored in the storage device. 13. The method of claim 12,
Wherein the memory reservation request message includes a deletion request message of a stored program for a storage device corresponding to a program for a storage device to be installed. 8. The method of claim 7,
Wherein the program for the storage device includes a program for installing or updating the program code. 8. The method of claim 7,
Wherein the code block for separation execution is converted into a code block for a storage device executable in the storage device. 8. The method of claim 7,
If the storage device is based on a Java Card Platform, the program for the storage device is an applet, and the detachment object code block is converted into a Java Byte code block or an ARM code block Wherein the code block comprises a plurality of code blocks. A computer-readable recording medium on which the method according to any one of claims 7 to 17 is recorded.

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