KR100740883B1 - Apparatus and Method of Transmitting/Receiving Digital Contents for the Digital Right Management - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an apparatus and method for transmitting and receiving digital content for copyright protection.

2. The technical problem to be solved by the invention

The present invention encrypts the content to be transmitted at the transmitting end, inserts the encrypted information into the corresponding player, transmits the encrypted information together with the encrypted content, and the receiving side decrypts the encrypted content using the encrypted information included in the player. It is an object of the present invention to provide a digital content transmission / reception apparatus and method for copyright protection, which enables reproduction without a separate playback program while preventing illegal copying or distribution.

3. Summary of Solution to Invention

The present invention provides a digital content transmission apparatus for copyright protection, comprising: encrypted information generating means for generating encrypted information; Content encryption means for encrypting the 'content selected by the user' using the encryption information generated by the encryption information generating means; Disposable player generating means for inserting the encrypted information generated by the encrypted information generating means into a player corresponding to the content to generate a disposable player; And one-time content generation means for generating and transmitting the one-time content through a combination of the content encrypted in the content encryption means and the disposable player generated in the one-time player generation means.

4. Important uses of the invention

The present invention is used for transmitting and receiving digital content.

Copyright Protection, Digital Content, Disposable Content, Disposable Players, Encrypted Information

Description

Apparatus and Method of Transmitting / Receiving Digital Contents for the Digital Right Management}

1 is a block diagram of an embodiment of a digital content transmission and reception apparatus for copyright protection according to the present invention;

2 is a diagram illustrating an embodiment of a digital content transmission method for copyright protection according to the present invention;

3 is a diagram for explaining a method of extracting a program in a digital content receiving device for copyright protection according to the present invention;

4 is a detailed configuration diagram of an embodiment of a disposable content playback unit in the digital content receiving device of FIG. 1 according to the present invention.

* Explanation of symbols on the main parts of the drawing

140: encryption information generating unit 120: content encryption unit

150: disposable player generation unit 130: disposable content generation unit

210: program extraction unit 220: storage unit

230: program driver 240: disposable content playback unit

The present invention relates to an apparatus for transmitting and receiving digital content for copyright protection, and more particularly, to a transmitter, after encrypting a content to be transmitted, inserting the encrypted information into a corresponding player and transmitting the same together with the "encrypted content". In addition, the receiving side decrypts and reproduces the encrypted content by using the encryption information included in the player, digital transmission and reception apparatus for copyright protection that can be reproduced without a separate playback program while preventing illegal copying or distribution, and its It is about a method.

In a conventional networked system, the digital content is transmitted to an authenticated user by authenticating the user and limiting the transmission at the server side transmitting the digital content.

In the case of transmitting media content through a network, in order to protect the media content, it is necessary to install a dedicated media player provided by each operator or have a dedicated hardware device. Therefore, illegal copying or distribution of a program without using a dedicated media player is required. There was a problem that can not be prevented.

In addition, in the case of the conventional cable and satellite broadcasting, a hardware-based system that restricts reception by registering a smart card for user authentication in advance and transmitting a key for decrypting content to a registered card user. Uses authentication technology. Therefore, since hardware (Cable Broadcasting POD Module) to which copyright protection technology is applied must be separately provided or subjected to a network authentication procedure, there is a problem that additional cost increases and time wasted according to the authentication procedure.

The present invention has been proposed to solve the above problems, and the transmitting side encrypts the content to be transmitted, inserts the encrypted information into the corresponding player, and transmits the encrypted content together with the encrypted content. It is an object of the present invention to provide a digital content transmission / reception apparatus and method for copyright protection that decrypts and reproduces an encrypted content by using information, so that it can be reproduced without a separate playback program while preventing illegal copying or distribution.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides a digital content transmission apparatus for copyright protection, comprising: encrypted information generating means for generating encrypted information; Content encryption means for encrypting the 'content selected by the user' using the encryption information generated by the encryption information generating means; Disposable player generating means for inserting the encrypted information generated by the encrypted information generating means into a player corresponding to the content to generate a disposable player; And one-time content generation means for generating and transmitting the one-time content through a combination of the content encrypted in the content encryption means and the disposable player generated in the one-time player generation means.

On the other hand, the present invention provides a digital content receiving device for copyright protection, comprising: program extracting means for extracting 'encrypted content' and 'disposable player' from the disposable content received from the digital content transmitting device side; Storage means for storing 'encrypted content' extracted by the program extraction means; Program driving means for driving the disposable player extracted by the program extracting means; And one-time content reproducing means for extracting encrypted information included in the single-use player, decrypting the 'encrypted content' stored in the storage means using the extracted encryption information, and playing the same through the single-use player. .

On the other hand, the present invention, in the digital content transmission method for copyright protection, encryption information generating step of generating encrypted information; A content encryption step of encrypting through an exclusive OR operation between the encryption information generated in the encryption information generation step and the content selected by the user; A single-use player generation step of generating a single-use player by inserting the encryption information generated in the encryption information generation step into a player corresponding to the content; Disposable content generation step of generating disposable content by combining the content encrypted in the content encryption step and the disposable player generated in the disposable player generation step: and disposable content for transmitting the disposable content generated in the disposable content generation step Transmitting step.

On the other hand, the present invention, in the digital content receiving method for copyright protection, program extraction step of extracting the 'encrypted content' and 'disposable player' by receiving the disposable content from the digital content transmission device side; An encryption information extraction step of extracting encryption information included in the 'disposable player' extracted in the program extraction step; A content decryption step of decrypting the 'encrypted content' in the program extraction step by using the encryption information extracted in the encryption information extraction step; And a one-time content playback step of playing back the 'encrypted content' decrypted in the content decryption step through the 'disposable player' extracted in the program extraction step.

The present invention provides the convenience of playing a broadcast even without a dedicated player suitable for the content while preventing illegal copying or distribution in digital broadcasting, video on demand (VOD), Internet Protocol TeleVision (IPTV), and the like, which transmits video information in real time. It is to increase.

To this end, the transmitting side encrypts the content selected by the user using the encryption information and inserts the encryption information into the player to transmit the encrypted content together with the disposable player, and the receiving side extracts the encryption information included in the disposable player and uses the same. To decrypt and reproduce the encrypted content.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of a digital content transmission and reception apparatus for copyright protection according to the present invention.

As illustrated in FIG. 1, the digital content transmission / reception apparatus for copyright protection includes a digital content transmission device 100 and a digital content reception device 200.

Here, the digital content transmission device 100 includes a content encryption unit 120, a disposable content generation unit 130, an encryption information generation unit 140, and a disposable player generation unit 150. 200 includes a program extractor 210, a storage 220, a program driver 230, and a disposable content player 240.

First, referring to FIG. 1, the components of the digital content transmission device 100 for copyright protection according to the present invention will be described.

The content data 110 includes digital contents, media contents (VoD, COD, etc.), contents such as an electronic book, and the like, which are transmitted in real time to be selected by a user (digital broadcasting, VoD, IPTV, etc.).

The player data 160 includes an MPEG player, an MP3 player, a Windows Media Video (WMV) player, an eBook viewer capable of playing electronic books, etc. corresponding to the content data 110 that can be selected by a user.

The encryption information generator 140 generates encrypted information using a predetermined initial value and time information. The encryption information has technical characteristics of general DRM. That is, the encrypted information uses an initial value that is kept secret and performs a function of limiting usage rules (eg, number of times, number of days, equipment environment, etc.) when a consumer uses content.

The content encryption unit 120 encrypts the content selected by the user by using the encryption information generated by the encryption information generation unit 140.

The disposable player generator 150 inserts the encryption information generated by the encryption information generator 140 into the player corresponding to the content selected by the user to generate the disposable player.

The disposable content generation unit 130 combines the content encrypted by the content encryption unit 120 and the disposable player generated by the disposable player generation unit 150 to generate disposable content.

Next, the components of the digital content receiving apparatus for copyright protection will be described.

The program extractor 210 separates and extracts the disposable content received from the digital content transmission device 100 into 'encrypted content' and the disposable player. The extracted 'encrypted content' is transmitted to the storage 220 and the disposable player is transmitted to the program driver 230.

The storage unit 220 stores the encrypted content extracted by the program extractor 210. Thereafter, the encrypted content is transmitted to the disposable content player 240.

The program driver 230 drives the disposable content player 240 by using the disposable player extracted by the program extractor 210.

The disposable content player 240 decrypts the disposable content by using encryption information included in the disposable player. Then, the content is played independently or in conjunction with the system media player.

2 is a diagram illustrating an embodiment of a method for transmitting digital content for copyright protection according to the present invention. Each component and operation will be described in detail with reference to the description of FIG. 1 and FIG. 2.

(143)을 포함하여 이루어지고, 시간정보와 콘텐츠 사업자로부터 미리 정해진 초기값(141)에 따라 해쉬함수(Hash Function)(142)를 이용하여 암호화정보

(143)을 생성하고, 암호화정보

(143)과 시간정보를 이용하여 매번 다른 암호화정보를 생성한다. 여기서, 해쉬함수 H(142)를 이용하여 n+1 번째 암호화정보

을 구하는 식은 다음의 [수학식 1]과 같다.First, the encryption information generation unit 140 encrypts information calculated by the initial value 141, the hash function H 142, and the hash function H predetermined by the content provider.

143, and encrypted information using a hash function 142 according to time information and a predetermined initial value 141 from a content provider.

143 generates encrypted information

Different encrypted information is generated each time by using 143 and time information. Here, the n + 1 th encrypted information using the hash function H (142)

The equation to find is shown in Equation 1 below.

은 n번째 암호화정보, 시간은 시간정보,

은 n+1번째 암호화정보를 나타낸다.Where H is the hash function,

Is the nth encryption information, time is time information,

Represents n + 1th encrypted information.

(143)을 생성하기 위하여 콘텐츠 사업자에 의해 미리 정해진 초기값

(141)와 시간정보를 변수로 가지는 해쉬함수 H를 이용하여 n번째 암호화정보

(143)을 생성한다(142). n번째 암호화정보

(143)는 콘텐츠 암호화부(120)와 일회용 재생기 생성부(150)로 전달되고, n+1 번째 암호화정보

을 생성하는 입력값으로 이용된다. 그러면, [수학식 1]과 같이 시간정보와 n번째 암호화정보

(143)을 이용하여 매번 다른 n+1번째 암호화정보

생성하게 된다.Different encryption information every time

Initial value predetermined by the content provider to generate 143

N-th encrypted information using the hash function H having 141 and time information as variables

143 is generated (142). nth encrypted information

143 is transmitted to the content encryption unit 120 and the disposable player generation unit 150, n + 1 th encryption information

It is used as an input value to generate. Then, the time information and the nth encrypted information as shown in [Equation 1]

N + 1th encrypted information every time using 143

Will be created.

Hereinafter, referring to FIG. 1, content data 110 including digital content, player data 160 corresponding to content data 110, encryption information generation unit 140, and content encryption for encrypting content The unit 120, the disposable player generator 150 for inserting the encryption information into the player to create a disposable player, and the disposable content for creating disposable content through a combination of the 'encrypted content' and the disposable player. The operation of the digital content transmission device 100 including the generation unit 130 will now be described.

First, when a user selects a desired content from the content data 110, the content provider selects a player corresponding to 'content selected by the user' from the player data 160.

(143)과 사용자로부터 선택받은 콘텐츠와의 배타적 논리합(Exclusive OR)연산을 통하여 암호화된 콘텐츠를 생성하고, 사용자로부터 선택받은 콘텐츠에 해당하는 재생기 안에는 주기적으로 내장하는 위치를 변경하여 암호화정보

(143)을 삽입한다. After that, the generated encryption information

143 generates an encrypted content through an exclusive OR operation between the content selected by the user, and periodically changes the embedded location in the player corresponding to the content selected by the user.

Insert (143).

(143)이 삽입된 재생기(133)를 각각 전송받아 결합하여 일회용 콘텐츠(131)를 생성하여 송신한다.The one-time content generation unit 130 receives the encrypted content 132 from the content encryption unit 120, and encrypted information from the one-time player generation unit 150

Each of the players 133 inserted with the 143 is received and combined to generate and transmit the disposable content 131.

3 is a diagram illustrating an embodiment of a program extraction method in a digital content receiving device for copyright protection according to the present invention. An operation related to each component will be described with reference to the description of FIG. 1 and FIG. 3.

The program extracting unit 210 receives the disposable content 211 from the digital content transmission device 100, separates the encrypted content 212 and the disposable player 213, extracts the encrypted content 212, and stores the encrypted content 212. Transmission to the unit 220 and the disposable regenerator 213 is transmitted to the program driver 230.

The storage unit 220 stores the encrypted content 212 extracted by the program extractor 210.

In addition, the program driver 230 performs a function of driving the disposable player 213 by linking the disposable player 213 extracted by the program extractor 210 with the receiving system.

4 is a detailed configuration diagram of an embodiment of a disposable content playback unit in the digital content receiving device of FIG. 1 according to the present invention. Each component and operation will be described below with reference to the description of FIG. 1 and FIG. 4.

The disposable content player 240 may include the encrypted content 244 transmitted from the storage unit 220, the disposable player 245 driven by the program driver 230, an independently playable player 247, and a system media player. 242, an output unit 243 included in the system media player 242 to perform an output function, and a program can be separated into two functions and operated as each program, and the single-use player 245 is independent. Or a binding interface unit 241 for playing back or playing in conjunction with the system media player 242.

The disposable content player 240 converts the encrypted content 244 transmitted from the storage 220 into a normal image through the disposable player 245 driven by the program driver 230, and plays the encrypted content 244.

That is, the disposable content player 240 extracts the encryption information 246 from the disposable player 245 driven by the program driver 230, and encrypts the content 244 using the extracted encryption information 246. ). The one-time content playback unit 240 decrypts the extracted encrypted information 246 and the encrypted content 244 through an exclusive OR operation, and inputs the decrypted content to the player 247.

Here, the method of playing the content is divided into two cases. Playback is performed in conjunction with the system media player 242 and playback is performed using only the player 247 independently.

First, the binding interface unit 241 is required to perform two playback methods. The binding interface unit 241 separates one program into two functions, and serves to allow each program to operate. In this regard, by using the binding interface unit 241 to support the playback method using the player 247 independently or in conjunction with the system media player 242, the user does not need to install a separate playback program to play There are advantages to it.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, even if some or all of the transmitted digital content is hacked, it is impossible to reproduce the digital content without a dedicated player (disposable player) containing encryption information, thereby preventing illegal copying or distribution. It is effective to prevent.

In addition, the present invention has the effect of allowing the user to play the digital content without having to install a separate playback program by transmitting the player with the digital content.

Claims (12)

In the digital content transmission device for copyright protection, Encryption information generating means for generating encrypted information; Content encryption means for encrypting the 'content selected by the user' using the encryption information generated by the encryption information generating means; Disposable player generating means for inserting the encrypted information generated by the encrypted information generating means into a player corresponding to the content to generate a disposable player; And Disposable content generating means for generating and transmitting the disposable content by combining the content encrypted by the content encrypting means with the disposable player generated by the disposable player generating means. Digital content transmission device for copyright protection comprising a. The method of claim 1, The encryption information generating means, Generates nth (n is an integer of 1 or more) th encrypted information by using a hash function having time information and a predetermined initial value as inputs, and converts the nth encrypted information to the next (n + 1th) encrypted information. A digital content transmission device for copyright protection, characterized by being used as input information in generation. The method according to claim 1 or 2, The content encryption means, And encrypting the data through an exclusive OR operation between the 'content selected by the user' and the encryption information. In the digital content receiving apparatus for copyright protection, Program extracting means for extracting 'encrypted content' and 'disposable player' from the disposable content received from the digital content transmitting device side; Storage means for storing 'encrypted content' extracted by the program extraction means; Program driving means for driving the disposable player extracted by the program extracting means; And One-time content reproducing means for extracting the encrypted information contained in the disposable player, decrypting the 'encrypted content' stored in the storage means by using the extracted encryption information, and then reproducing it through the single-use player. Digital content receiving device for copyright protection comprising a. The method of claim 4, wherein The disposable content playback means, And decrypting the extracted encryption information through an exclusive OR operation between the extracted encryption information and the encrypted content. The method according to claim 4 or 5, The disposable content playback means, And playing the decrypted content in combination with a system media player using a binding interface, or independently playing the single-use player. In the digital content transmission method for copyright protection, Encrypting information generating step of generating encrypted information; A content encryption step of encrypting through an exclusive OR operation between the encryption information generated in the encryption information generation step and the content selected by the user; Creating a disposable player by inserting the encrypted information generated in the encryption information generating step into a player corresponding to the content; Disposable content generation step of generating a single-use content by combining the content encrypted in the content encryption step and the disposable player generated in the disposable player generation step: And Disposable content transmission step of transmitting the disposable content generated in the one-time content generation step Digital content transmission method for copyright protection comprising a. The method of claim 7, wherein The encryption information generation step, Generates nth (n is an integer of 1 or more) th encrypted information by using a hash function having time information and a predetermined initial value as inputs, and inputs the nth encrypted information at the next (n + 1th) generated encryption information. Digital content transmission method for copyright protection, characterized in that used as information. The method according to claim 7 or 8, The disposable player generation step, And inserting the encrypted information generated in the encryption information generating step into the player and periodically changing the built-in position. In the method of receiving digital content for copyright protection, A program extraction step of receiving the disposable content from the digital content transmission device side and extracting 'encrypted content' and 'disposable player'; An encryption information extraction step of extracting encryption information included in the 'disposable player' extracted in the program extraction step; A content decryption step of decrypting the 'encrypted content' in the program extraction step by using the encryption information extracted in the encryption information extraction step; And Disposable content reproduction step of reproducing the 'encrypted content' decoded in the content decoding step through the 'disposable player' extracted in the program extraction step Digital content receiving method for copyright protection comprising a. The method of claim 10, The content decrypting step, And decrypting the 'encrypted content' in the program extraction step through an exclusive OR operation with the encrypted content. The method of claim 10 or 11, The disposable content playback step, The method for receiving digital content for copyright protection, characterized in that the 'encrypted content' decrypted in the content decrypting step is played in combination with a system media player or independently played using a binding interface.

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