JP2009140050A - Download terminal, server, download system, download method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that, although it is possible to achieve a rental system whose viewing is permitted with a time limit by applying a DRM technology to a service for downloading a content through a network, it is necessary to initially register a DRMID of the terminal in a server in the case of achieving the system, and several problems such as security, usability, and maintenance of initially registered session information are caused in the case of initially registering the DRMID. <P>SOLUTION: Information for discriminating content for initial registration from a content for normal registration and initially registered session information are applied to control information 410 necessary for a terminal 120 to download the content from a server 230, and the terminal 120 switches download information according to the information, and preferentially executes processing to register DRMID 420 in a server 250 by using a DRM exclusive application. Thus, it is possible to improve a security level. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In recent years, with the development of the Internet, techniques for downloading and playing back movies, music, and the like are becoming common. There are many services for downloading content from a server that distributes content such as movies and music to a PC, AV device, mobile phone, or portable device via a network.

  By applying DRM technology to such a content distribution service, it is possible to realize a content rental system that permits viewing with a limited viewing time limit. As this type of rental system, for example, there is a first conventional example as described in Patent Document 1.

  FIG. 5 is a diagram showing the configuration of the rental system of the first conventional example. In FIG. 5, the web server 200, the content server 220, and the DRM server 240 can be accessed from the download terminal 100 in the home via the network 150. The web server 200 is a web server in which a rental company presents rental content to a user. The content server 220 is a download content server that provides encrypted AV content in response to a request from the download terminal 100. The DRM server 240 is a server that provides a decryption key for decrypting the encrypted content downloaded by the download terminal 100.

  The operation of the rental system of the first conventional example will be described with reference to FIGS. 6, 7 and 8. FIG.

  FIG. 6 is a block diagram showing the inside of the download terminal 100, web server 200, content server 220, and DRM server 240 of the first conventional example. First, the main functions of each component will be described with reference to FIG. 6, and the functions associated with each component will be described in the sequence diagram of FIG.

  First, the download terminal 100 will be described. The download terminal 100 includes a network I / F 102, a browser 103, an information display unit 104, an operation input unit 105, a control information acquisition unit 108, a DL control unit 110, a content acquisition unit 111, a DRM client 112, a storage unit 113, and a content list management. Unit 114, decoder 115, and playback unit 116.

  The browser 103 communicates with the network 150 via the router 101, interprets the received HTML document, and displays information 106 for the user via the information display unit 104. The web page displayed on the browser 103 is operated by a user operation input 107 through the operation input unit 105. The control information acquisition unit 108, the content acquisition unit 111, and the DRM client 112 are connected to the network 150 via the network I / F 102 and the router 101.

  The control information acquisition unit 108 acquires the control information 400 sent from the web server 200 and stores it in the storage unit 113. In addition, when the control information 400 is acquired, the DL control unit 110 is notified. Details of the control information 400 will be described later (FIG. 7). The DL control unit 110 sends a content acquisition request to the content acquisition unit 111. In response to a request from the DL control unit 110, the content acquisition unit 111 acquires the normal content 224 from the content server 220 and stores it in the storage unit 113.

  In response to a request from the content list management unit 114, the DRM client 112 performs DRM authentication with the DRM server 240, acquires the decryption key 422 for the encrypted content from the DRM server 240, and stores it in the storage unit 113. The DRM client 112 manages the DRM ID 420 used at the time of DRM authentication. The DRMID is an identifier unique to the download terminal 100, and is information with a high security level transmitted from the download terminal 100 to the DRM server 240 only during DRM authentication. The DRM server 240 manages the license information of the content purchased by the user by using this DRMID, and obtains both the DRMID and the license information to obtain the download terminal that issued the license information. The decryption key of the appropriate encrypted content can be distributed.

  The content list management unit 114 displays a list regarding the encrypted content 421 stored in the storage unit 113 on the GUI screen of the information display unit 104 in response to a request from the user. The user selects desired content from the GUI screen and issues a playback instruction through the operation input unit 105. When the content list management unit 114 receives a content reproduction instruction via the operation input unit 105, the content list management unit 114 takes out the appropriate encrypted content 421 and its decryption key 422 from the storage unit 113 and sends them to the decryptor 115. The decryptor 115 decodes the acquired encrypted content 421 using the decryption key 422, and performs playback output 117 through the playback unit 116.

  The web server 200 will be described. The web server 200 includes an HTML distribution unit 201 and a control information distribution unit 202. The HTML distribution unit 201 distributes an HTML page related to content purchase / registration to the download terminal 100. The control information distribution unit 202 distributes the control information 400 necessary for downloading the content including the license information issued by the license information issue unit 243 to the download terminal 100. The content server 220 will be described. The content server 220 includes a content distribution unit 221 and a content storage unit 222. The content distribution unit 221 distributes the encrypted content 224 requested from the download terminal 100 from the content storage unit 222 to the download terminal 100. The content storage unit 222 stores various encrypted content 224 and delivers the requested encrypted content to the content distribution unit 221.

  The DRM server 240 will be described. The DRM server 240 includes a DRM authentication unit 241, a license information issuance unit 243, a decryption key distribution unit 245, and a license information / DRMID association storage unit 244. The DRM authentication unit 241 performs DRM authentication in response to a request from the download terminal 100. At this time, the DRM ID 420 and license information are acquired. The license information issuing unit 243 issues license information corresponding to the content purchased by the user and the purchase conditions, and distributes the license information to the control information distribution unit 202. Here, the purchase conditions are rental, sale, etc. for 7 days and 8 days. The distributed license information is stored in the license information DRMID association storage unit 244. The license information / DRMID association storage unit 244 stores the license information issued by the license information issue unit 243 in association with the DRMID registered in advance as shown in the balloon of FIG. The decryption key distribution unit 245 distributes the decryption key of the encrypted content to the download terminal 100.

  FIG. 7 is a diagram illustrating a configuration of the control information 400 that the control information distribution unit 202 of the web server 200 distributes to the download terminal 100. The control information 400 includes a content URL 401, a DRM server URL 402, and license information 403. The content URL 401 is information that can uniquely identify the location of the encrypted content 224 stored in the content storage unit 222 of the content server 220. The DRM server URL 402 is information that can uniquely identify the location of the DRM server 240. The license information 403 is information generated from the purchase conditions of the content and identification information that can uniquely identify the content. The license information 403 is generated by the license information issuing unit 243 of the DRM server 240, and the control information distribution unit 202 of the web server 200. Is described in the control information 400.

  Next, in the first conventional example, the operations and communication sequences of the download terminal 100, the web server 200, the content server 220, and the DRM server 240 until the user purchases the content and reproduces it on the download terminal 100 are shown in FIG. Will be described. In FIG. 8, the download terminal 100, the web server 200, the content server 220, and the DRM server 240 have the same configuration as that of FIG. The illustration is omitted. First, the user operates the download terminal 100 according to the content purchase / DL registration instruction 300 to connect to the web server 200 using a Web browser or other communication application, and transmits the content purchase / DL registration request 301 there. . Upon receiving the content purchase / DL registration request 301, the web server 200 transmits a license information issuance request 302 including content identification information and content purchase conditions to the DRM server 240. When the DRM server 240 receives the license information issuance request 302, the license information issuance unit 243 issues the license information 403 determined from the content identification information acquired from the web server 200 and the content purchase conditions in step 303. The DRM server 240 then distributes the issued license information 403 304 to the web server 200. When the web server 200 receives the license information distribution 304, the control information distribution unit 202 describes the license information 403 issued by the DRM server 240 in step 303 in the control information 400, and sends the control information distribution 305 to the download terminal 100. Do.

  The download terminal 100 acquires the control information 400 by the control information acquisition unit 108 through the control information distribution 305 and stores it in the storage unit 113. At this time, since the download terminal 100 has a function of storing a plurality of control information, the DL control unit 110 can access the location indicated by the content URL included in the control information 400 in the order in which the control information 400 is stored. A content acquisition request is instructed to the content acquisition unit 111. In response to a request from the DL control unit 110, the download terminal 100 transmits a content acquisition request 306 to the content server 220. At this time, the content acquisition unit 111 of the download terminal 100 transmits a content acquisition request 306 to the location indicated by the content URL 401 in the control information 400.

  When the content server 220 receives the content acquisition request 306, the content server 220 executes the content DL execution 307 for the content acquisition unit 111 of the download terminal 100. The content acquisition unit 111 of the download terminal 100 acquires the encrypted content 224 from the content server 220 and stores it in the storage unit 113.

  In response to a user operation instruction, the content list management unit 114 displays a list of one or more encrypted contents 421 stored in the storage unit 113 on the GUI screen of the information display unit 104. The user performs a desired content selection / playback instruction 308 from the content list displayed on the GUI screen. When the download terminal 100 receives the content selection / playback instruction 308, the DRM client 112 uses the DRM ID 420 stored in the terminal and the license information 403 in the control information 400 to the DRM server 240. Against.

  When DRM authentication is established by the DRM authentication unit 241 of the DRM server 240, the download terminal 100 transmits a decryption key request 310 to the DRM server 240. Upon receiving the decryption key request 310, the DRM server 240 refers to the license information / DRM ID association storage unit 244 by the DRM authentication unit 241 in step 311 for performing license determination, and the DRM ID 420 and the license information acquired by the DRM authentication 309. It is checked whether 403 is stored correspondingly. When the storage is confirmed, the decryption key distribution unit 245 causes the DRM server 240 to perform the decryption key distribution 312 to the download terminal 100.

  Upon receiving the decryption key distribution 312, the download terminal 100 stores the decryption key 422 acquired by the DRM client 112 in the storage unit 113. In step 313, the content list management unit 114 decrypts the encrypted content 421 for which the content selection / playback instruction 308 has been issued from the storage unit 113 and the decryption key 422 corresponding to the encrypted content 421 stored earlier. Delivered to machine 115. The decryptor 115 decodes the encrypted content 421 by using the decryption key 422, and reproduces and outputs 117 through the reproducing unit 116, thereby realizing content reproduction.

  However, in order to realize the first conventional example, it is necessary to register the DRM ID 420 in the DRM server 240 in advance. At this time, as described above, the DRMID is high-security information that can be transmitted from the download terminal 100 to the DRM server 240 only during DRM authentication, and cannot be distributed to the DRM server 240 in advance. Therefore, there is a first problem that a DRMID initial registration sequence using network communication is required from the download terminal 100 to the DRM server 240.

  In order to cope with this first problem, there has been a second conventional example related to the initial registration of user information as described in Patent Document 2, for example.

  A second conventional example will be described with reference to FIG. FIG. 9 is an operation and sequence for registering user information necessary for initial user registration from the download terminal 100 in the web server 200 in the second conventional example.

  First, the user operates the download terminal 100 by the first access 340 and connects to the web server 200 using a communication application such as a Web browser. When the web server 200 receives the initial access 340, the web server 200 determines in step 341 that the information about the download terminal 100 connected by the initial access 340 is not held, and in step 341, determines that it is the first access. Then, the web server 200 transmits a registration information request 342 to the download terminal 100. When the download terminal 100 acquires the registration information request 342 from the web server 200, the download terminal 100 prompts the user to input registration information. Then, the user performs registration information input 343 necessary for initial registration.

  The registration information necessary for the initial registration generally includes a user name and a password. When receiving the registration information input 343, the download terminal 100 performs registration information transmission 344 to the web server 200. The web server 200 stores the user information received by the registration information transmission 344 and executes user registration in step 345.

  However, in order to apply the second conventional example to the initial registration of DRMID, it is necessary to perform DRM authentication between the download terminal 100 and the DRM server 240 in the initial registration sequence. At this time, in general, in the second conventional example, it is conceivable to register user information in the web server 200 using the browser of the download terminal 100. Therefore, a method of registering the DRMID in the DRM server through a browser using the user information registration communication can be considered. However, DRMID registration using a browser has a second problem that it is easy to create a security hole by using a browser and it is difficult to realize DRM initial registration with a high security level.

  In order to cope with this second problem, there can be considered a method of dividing into two steps of registration of user information by a browser and initial registration of DRMID using a DRM client with a high security level used for DRM authentication. As a method divided into these two steps, the first conventional example can be used as it is as a user's initial registration sequence. For example, in the content purchase / DL registration instruction 300 in FIG. 8, the user sends an initial registration instruction, and the download terminal 100 downloads the initial registration content by the content DL execution 307. Then, the user selects the initial registration content for which the DL has been completed from the GUI screen of the download terminal 100, and performs the content selection / playback instruction 308, thereby using the DRM authentication 309 using the DRM client to set the DRMID 420 to the DRM It is possible to register with the server 240 for the first time.

  However, by dividing into two steps in this way, the user closes the browser connected to the web server 200 for the first registration, launches a GUI screen that purposely displays the content list that has been downloaded, and the GUI screen There is a third problem that it is necessary to take a troublesome procedure of confirming that the download of the content for initial registration is completed and instructing reproduction.

Also, by dividing into two steps, some initial registration session information that can confirm whether the download terminal that came to DRM authentication 309 is the same as the download terminal that requested user registration and made the registration request for initial registration content. There is a fourth problem that is necessary.
JP 2001-309332 A Japanese Patent No. 2998785

  In consideration of the first to fourth problems of the conventional network video distribution system as described above, the present invention can realize the initial registration of DRMID and register the DRMID using a DRM client having a high security level. It is possible to register the user information by the browser and DRMID registration using the DRM client in two steps without taking the user trouble. The user information registration by the browser and the DRMID registration using the DRM client 2 An object of the present invention is to provide a download terminal, a server, a download system, a download method, a program, and a recording medium that supply session information that links processing over steps.

The first aspect of the present invention is
A download terminal that downloads the content for user initial registration or the content for viewing from a server in which content for user initial registration and content for viewing are stored,
Obtaining from the server control information comprising at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing;
From the control information, when it is the content for the user initial registration, execute a download process for the user initial registration,
When the content is for viewing based on the control information, the download terminal executes a normal download process.

The second aspect of the present invention
The download terminal has a function of sequentially executing a plurality of download processes,
In the case where the control information indicates content for the initial user registration, the user registration content download process is preferentially performed over the viewing content. It is a download terminal of the present invention.

The third aspect of the present invention provides
In the download terminal,
At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The download terminal according to the first aspect of the present invention.

The fourth invention relates to
The initial registration session information is stored in the license information included in the control information. The download terminal according to the third aspect of the present invention.

The fifth aspect of the present invention relates to
The download terminal according to the fourth aspect of the present invention is characterized in that the license information can be uniquely specified for the download terminal at least at the time of initial user registration.

The sixth invention relates to
The download according to the third aspect of the present invention, wherein the user initial registration content and / or the viewing content stored in the server are encrypted encrypted content. It is a terminal.

The seventh invention relates to
A download terminal according to a sixth aspect of the present invention, wherein a terminal identifier necessary for authentication for acquiring a decryption key necessary for decrypting the encrypted content downloaded from the server is held in advance.

The eighth invention relates to
The download terminal according to the seventh aspect of the present invention is characterized in that the decryption key necessary for decrypting the encrypted content is uniquely specified by the terminal identifier and the license information.

The ninth invention relates to
In the download process for the user initial registration,
When the download terminal completes downloading the user initial registration content from the server,
Without user operation instructions, input instructions, or content playback instructions,
The download terminal according to the seventh aspect of the present invention, wherein the download terminal makes a connection to the server using the terminal identifier and the license information, and registers the terminal identifier in the server through the connection. It is.

The tenth aspect of the present invention is
After the download terminal registers the terminal identifier in the server,
Obtaining the decryption key from the server;
By decrypting the user initial registration content downloaded to the download terminal with the decryption key and confirming the playback output,
The download terminal according to the seventh aspect of the present invention guarantees reliability of a communication path between the download terminal and the server.

The eleventh aspect of the present invention is
In a download method for downloading the content for user initial registration or the content for viewing from a server in which content for user initial registration and content for viewing are stored to a download terminal,
Obtaining from the server control information comprising at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing;
From the control information, when the content is for user initial registration, execute download processing for user initial registration,
When the content is for viewing from the control information, a normal download process is executed.

The twelfth aspect of the present invention is
The download method having a function of sequentially executing a plurality of download processes,
In the eleventh aspect of the present invention, when the control information indicates content for user initial registration, download processing of the content for user registration is preferentially performed over content for viewing. It is a download method.

The thirteenth aspect of the present invention is
In the download method,
At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The download method of the eleventh aspect of the present invention.

The fourteenth aspect of the present invention is
The initial registration session information is a download method according to a thirteenth aspect of the present invention, wherein the initial registration session information is stored in the license information included in the control information.

The fifteenth aspect of the present invention is
The download method according to the fourteenth aspect of the present invention is characterized in that the license information can be uniquely specified for the download terminal at least at the time of initial user registration.

The sixteenth aspect of the present invention
Both the user initial registration content and the viewing content stored in the server, or either one of them is encrypted encrypted content,
The download terminal holds in advance a terminal identifier necessary for authentication to obtain a decryption key necessary for decrypting the encrypted content downloaded from the server,
The decryption key necessary for decrypting the encrypted content is uniquely identified by the terminal identifier and the license information,
In the download process for the user initial registration,
When the download terminal completes downloading the user initial registration content from the server,
Without an operation instruction, input instruction, or content reproduction instruction from the user, the download terminal makes a connection to the server using the terminal identifier and the license information, and the terminal is connected to the server by the connection. An identifier is registered, and the download method according to the thirteenth aspect of the present invention is provided.

The seventeenth aspect of the present invention provides
A server that stores content for initial user registration and content for viewing and distributes to a download terminal,
Distributing control information composed of at least information indicating a download destination of the content, license information of the content, and information for determining the content for the initial user registration or the content for viewing to the download terminal. Is a server characterized by

The eighteenth aspect of the present invention is
At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The server according to the seventeenth aspect of the present invention.

The nineteenth aspect of the present invention provides
The initial registration session information is stored in the license information included in the control information.

The twentieth aspect of the present invention is
The server according to the nineteenth aspect of the present invention is characterized in that the license information can be uniquely specified at least at the time of the initial user registration with respect to the download terminal.

The twenty-first aspect of the present invention
A download system comprising a server storing content for user initial registration and content for viewing, and a download terminal for downloading the content for user initial registration or the content for viewing from the server,
The download terminal receives control information including at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing. Get from
From the control information, when it is the content for the user initial registration, execute a download process for the user initial registration,
When the content is for viewing from the control information, a normal download process is executed.

The twenty-second invention relates to
The download terminal has a function of sequentially executing a plurality of download processes,
When the control information indicates that the content is for the user initial registration, the download process for the user registration content is preferentially performed over the viewing content. It is a download system of the present invention.

The twenty-third invention provides
The download terminal is at least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. A download system according to the twenty-first aspect of the present invention.

The twenty-fourth aspect of the present invention
The initial registration session information is stored in the license information included in the control information, according to the twenty-third download system of the present invention.

According to a twenty-fifth aspect of the present invention,
The download system according to a twenty-fourth aspect of the present invention is characterized in that the license information can be uniquely specified for the download terminal at least at the time of initial user registration.

The twenty-sixth aspect of the present invention provides
Both the user initial registration content and the viewing content stored in the server, or either one of them is encrypted encrypted content,
The download terminal holds in advance a terminal identifier necessary for authentication to obtain a decryption key necessary for decrypting the encrypted content downloaded from the server,
The decryption key necessary for decrypting the encrypted content is uniquely identified by the terminal identifier and the license information,
In the download process for the user initial registration,
When the download terminal completes the download of the content for the user initial registration from the server, without an operation instruction, input instruction, or content reproduction instruction from the user,
The download terminal according to the 23rd aspect of the present invention, wherein the download terminal makes a connection to the server using the terminal identifier and the license information, and registers the terminal identifier in the server through the connection. It is.

The twenty-seventh aspect of the present invention provides
After the download terminal registers the terminal identifier in the server, obtains a decryption key from the server,
By decrypting the user initial registration content downloaded to the download terminal with the decryption key and confirming the playback output,
27. The download system according to claim 26, wherein reliability of a communication path between the download terminal and the server is guaranteed.

The twenty-eighth aspect of the present invention provides
In a download method of an eleventh aspect of the present invention, the computer is caused to execute the step of acquiring the control information from the server, the execution step of the download process for the initial user registration, and the execution step of the normal download process It is a program.

  The twenty-ninth aspect of the present invention is a recording medium recording the program of the twenty-eighth aspect of the present invention, which is a recording medium that can be processed by a computer.

  According to the present invention, initial registration of DRMID can be realized, DRMID can be registered using a DRM client having a high security level, and registration of user information by a browser and DRMID registration using a DRM client are performed in two steps. The procedure can be realized without requiring the user, and a remarkable effect can be obtained that session information that links two steps of registration of user information by a browser and DRMID registration using a DRM client can be provided.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIGS. 1, 2, and 3. FIG. In the first embodiment, the download terminal 100 of the first conventional example shown in FIG. 5 is the download terminal 120, the web server 200 of the first conventional example is the web server 210, and the content server 220 of the first conventional example is the first. A conventional content server 230 and a first conventional DRM server 240 are replaced with a DRM server 250.

  FIG. 1 is a diagram showing the configuration of the control information 410 in the present embodiment. The control information 410 includes a content URL 401, a DRM server URL 402, license information 403, and content determination information 404. The content URL 401, the DRM server URL 402, and the license information 403 are the same as those in the first conventional example, but the content determination information 404 is because the control information 410 registers the DRM ID 420 of the download terminal 120 in the DRM server 250. (Hereinafter referred to as initial registration) is assigned a value of “0” when distributed from the web server 210 to the download terminal 120.

  Further, when the control information 410 is distributed from the web server 210 to the download terminal 120 in order to perform normal content download reservation registration as shown in the first conventional example, “1” is set in the content determination information 404. The value of is given. The download terminal 120 switches between a download process at the time of initial registration and a normal download process according to the value of the content determination information 404. Details of the download process at the time of initial registration will be described later. The normal download process is the method shown in the first conventional example.

  FIG. 2 is a block diagram showing the inside of the download terminal 120, the web server 210, the content server 230, and the DRM server 250 in the first embodiment. First, the main functions of each component will be described with reference to FIG. 2, and the functions associated with each component will be described in the operation / sequence diagram of FIG. 3 to be described later.

  First, the download terminal 120 will be described. The download terminal 120 includes an NW-I / F 102, a browser 103, an information display unit 104, an operation input unit 105, a control information acquisition unit 108, a control information determination unit 109, a DL control unit 118, a content acquisition unit 111, a DRM client 112, The storage unit 113, the content list management unit 114, the decoder 115, and the playback unit 116 are configured. Constituent elements having the same functions as those of the download terminal 100 of the first conventional example are given the same numbers, and descriptions thereof are omitted.

  The control information determination unit 109 determines whether the control information 410 acquired by the control information acquisition unit 108 is control information related to content for initial registration or control information related to normal content, and the determination result (whether it is a process for initial registration, Normal processing) is notified to the DL control unit 118. The DL control unit 118 controls the download process based on the determination result notified from the control information determination unit 109. When the DL control unit 118 receives a notification of normal processing from the control information determination unit 109, the DL control unit 118 instructs the content acquisition unit 111 and the DRM client 112 to perform the same processing as in the first conventional example. On the other hand, when the DL control unit 118 receives a notification of the initial registration process from the control information determination unit 109, the DL control unit 118 sends an instruction to the content acquisition unit 111 to execute download in preference to normal content. When the download of the normal content by the content acquisition unit 111 is completed, the DL control unit 118 continues to instruct the DRM client 112 to perform DRM authentication to the DRM server 250.

  The web server 210 will be described. The web server 210 includes an HTML distribution unit 201 and a control information distribution unit 203. Constituent elements having the same functions as those of the first conventional web server 200 are denoted by the same reference numerals and description thereof is omitted. The control information distribution unit 203 assigns information for initial registration to the content determination information 404 of the control information 410 at the time of initial registration, and normal registration to the content determination information 404 of the control information 410 at the time of normal registration. Give some information.

  Next, the content server 230 will be described. The content server 230 includes a content distribution unit 221 and a content storage unit 225. Constituent elements having the same functions as those of the content server 220 of the first conventional example are denoted by the same reference numerals and description thereof is omitted. The content storage unit 225 manages and stores two types of content, the initial registration content 223 and the encrypted content 224. Here, the initial registration content is content that the download terminal 120 downloads in order for the download terminal 120 to register the DRMID in the DRM server 250.

  The content for the initial registration is content that has a shorter playback time than normal content, and includes promotions of the content provider, welcome videos, and the like. The sequence and operation in which the download terminal 120 downloads the initial registration content 223 will be described later. The encrypted content 224 is the same as in the first conventional example.

  The DRM server 250 will be described. The DRM server 250 includes a DRM authentication unit 241, a DRMID registration unit 242, a license information issue unit 246, a license information / DRMID association storage unit 244, and a decryption key distribution unit 245. Constituent elements having the same functions as those of the first conventional DRM server 240 are assigned the same reference numerals, and descriptions thereof are omitted. The DRMID registration unit 242 stores the DRMID of the download terminal 120 that has been registered for the first time in the license information / DRMID association storage unit 244. At the time of initial registration, the license information issuing unit 246 issues license information that can uniquely identify the download terminal 120 that makes the initial registration request, and passes it to the control information distribution unit 203. The license information issuance unit 246 performs the same processing as in the first conventional example when registering download reservation for normal contents.

  Next, in the first embodiment, the operation and communication sequence of the download terminal 120, the web server 210, the content server 230, and the DRM server 250 in the initial registration process in which the download terminal 120 registers the DRM ID 420 in the DRM server 250. This will be described with reference to FIG. In FIG. 3, the download terminal 120, the web server 210, the content server 230, and the DRM server 250 have the same configuration as that shown in FIG. The illustration is omitted.

  First, the user issues a user initial registration instruction 320 to the download terminal 120, connects to the web server 210 using a Web browser or other communication application, and transmits a user initial registration request 321 including the terminal ID 440. The terminal ID 440 indicates information that can uniquely identify the download terminal 120. Upon receiving the user initial registration request 321, the web server 210 transmits a user initial registration license information request 322 including the acquired terminal ID 440 to the DRM server 250.

  Upon receiving the user initial registration license information request 322, the DRM server 250 generates license information 403 that can uniquely identify the download terminal 120 using the terminal ID 440 in the license information issuing unit 246 in step 323, and Issue license information for initial registration. Here, by issuing license information that can uniquely identify the download terminal 120, the download terminal that came to connect to register the DRMID in the DRM server 250 after this is the same as the download terminal 120 that came to the initial registration Since it can confirm whether it is a thing, the 4th subject demonstrated in the prior art can be solved. That is, the license information 322 that can uniquely specify the download terminal 120 serves as session information that links the communication of the user initial registration request 321 and the communication of the DRM authentication 309 later.

  The DRM server 250 distributes the issued license information 403 to the web server 210 by the user initial registration license information distribution 324. When the web server 210 receives the user initial registration license information distribution 324, the control information distribution unit 203 includes the license information 403 issued by the DRM server 250 in step 323 and the content for initial registration as the content determination information 404. A value of “0” indicating this is described in the control information 410. Then, the web server 210 performs control information delivery 325 for user initial registration to the download terminal 120 with the control information 410.

  The download terminal 120 acquires the control information 410 by the control information acquisition unit 108 through the user initial registration control information distribution 325 and stores it in the storage unit 113. At this time, in step 326, the control information determination unit 109 determines from the acquired control information 410 whether the control information is for initial registration or the control information for normal content download reservation registration. Perform type determination.

  In the control information determination unit 109, the value of the content determination information 404 of the acquired control information 410 is “0”, so that it is determined as control information for initial registration. Then, in step 327, the download terminal 120 performs DL processing with the highest priority. This is to preferentially download the content for initial registration corresponding to the control information 410 over the normal content already registered for download reservation in the download terminal 120. As a result, even if you have already registered multiple download reservations for normal content, you can download the content for initial registration without waiting for the time required to download them, and move to the DRMID registration process smoothly and quickly. There is a special effect that can be done.

  On the other hand, if the download terminal 120 acquires control information corresponding to normal content from the web server 210, it is determined in step 326 that the content is normal content, and the subsequent processing is the same as in the first conventional example. Similar processing is performed.

  After the download terminal 120 executes DL processing with the highest priority in step 327, the download terminal 120 makes an initial registration content acquisition request 328, and the content acquisition unit 111 stores the initial registration content stored in the content storage unit 225 of the content server 230. 223 is downloaded through the content distribution unit 221 by the initial registration content DL execution 329.

  Here, in the first conventional example, after the content DL execution 307 is completed, the content selection / playback instruction 308 is performed by the user, so that the DRM authentication 309 is executed. After the registration content DL execution 329 is completed, the DRM authentication 309 is continuously executed without the content selection / playback instruction by the user. This is determined in step 326 from the control information 410 that the content is for initial registration, and thus the DL control unit 118 performs the DRM authentication 309 without the reproduction instruction from the user after the content download is completed. Is possible by controlling the DRM client 112. As a result, it is possible to reduce troublesome procedures in which the user intentionally selects the content for initial registration after the user first registration instruction 320 has been downloaded from the GUI screen of the download terminal 120 and issues a reproduction instruction. The third problem described in the prior art can be solved.

  The DRM server 250 acquires the DRM ID 420 and the license information 403 from the download terminal 120 through the DRM authentication 309. The DRM ID registration unit 242 of the DRM server 250 confirms that the acquired license information 403 matches the license information 403 generated by issuing the license information for user initial registration in step 323. In step 331, the DRMID registration unit 242 assigns the license information 403 to the download terminal 120 uniquely in step 331. Register.

  As described above, since the DRM ID is registered in the DRM server 250 from the download terminal 120 by the DRM authentication sequence using the DRM client 112, the security performance is remarkably improved as compared with the case where the DRM ID is registered by an application such as a browser. Therefore, the second problem described in the related art can be solved.

  The subsequent decryption key request 332 and decryption key distribution 333 are the same as in the first conventional example. After receiving the decryption key distribution 333, the download terminal 120 receives a user initial registration completion notification 334 from the DRM server 250. As a result, the fact that the initial registration of the user has been completed is displayed on the browser 103 of the download terminal 120 to the user. Here, since the download terminal 120 has acquired the decryption key of the content for initial registration, the content for initial registration can be reproduced.

  Therefore, by confirming that the content for initial registration can be reproduced, the user can confirm that a series of operations and sequences of the download terminal 120, the web server 210, the content server 230, and the DRM server 250 are functioning normally. Can be confirmed at the time of initial registration, and further, there is a special effect that the reliability of the communication path is also guaranteed. Thus, since the DRMID can be registered by the sequence as shown in FIG. 3, the first problem described in the prior art can be solved.

  As described above, the first embodiment can simultaneously solve the first to fourth problems described in the prior art.

  In the first embodiment, the notation is distinguished from the web server 210, the content server 230, and the DRM server 250, but these servers are not independent servers, and all function together as one server. It doesn't matter.

  In the first embodiment of the present invention, the download terminal downloads the initial registration content and obtains the decryption key. However, these processes are not performed, and after acquiring the control information 410, the DRM authentication is performed. You can move to 330. This has the effect of saving time for downloading the initial registration content.

  In the first embodiment of the present invention, the content determination information 404 is described in the control information 410, so that the download terminal switches between the initial registration download process and the normal download process. By making a part of the information to be given a special form, it may be distinguished whether the content is for initial registration or normal content. Originally, a part of the information included in the control information is given a special form, for example, all the upper 4 bits of the license information are set to 0. Thereby, there is an effect that the present invention can be realized without changing the format of the original control information.

  In the first embodiment of the present invention, the playback of the initial registration content is confirmed at the download terminal. However, the first registration content downloaded by the download terminal is automatically used by using a function such as a checksum. You can inspect it. Accordingly, there is an effect that it is possible to confirm that a series of operations and sequences of the download terminal 120, the web server 210, the content server 230, and the DRM server 250 are functioning normally without the user giving a reproduction instruction.

(Embodiment 2)
The second embodiment of the present invention will be described below with reference to FIG.
FIG. 4 shows an operation / sequence regarding the initial registration of DRMID by the download terminal 120, portal / authentication server 500, and business server 501.

  The portal / authentication server 500 has the function of the DRM server 250 in the first embodiment and also has a portal authentication function with the download terminal 120. The download terminal 120 can be connected to the provider server 501 through the portal / authentication server 500 without fail. The provider server 501 has the functions of the web server 210 and the content server 230 in the first embodiment, and also has a function of managing a user ID and a terminal ID in association with each other.

  Here, the user ID means that the business server 501 is directly connected from a mobile phone or the like without using the portal / authentication server 500 and provides a certain function. It is information that identifies whether or not. In the second embodiment of the present invention, the provider server 501 does not have a DRM server function, and therefore DRMID registration and management are impossible. Therefore, the provider server 501 requests the provider server 501 to register the content download reservation from the mobile phone by associating the user ID and the terminal ID, and the provider server 501 associates the user ID of the mobile phone with the user ID. It is possible to provide a service such as distributing content to a download terminal with the attached terminal ID.

  First, the user performs portal authentication 511 between the download terminal 120 and the portal / authentication server 500 in accordance with a connection instruction 510 to the business operator. At this time, the terminal ID 440 of the download terminal 120 is transmitted to the portal / authentication server 500. When this is finished, user authentication 512 is continuously performed between the download terminal 120 and the provider server 501. Then, the business server 501 acquires the terminal ID 440. At this time, the provider server 501 may acquire the terminal ID 440 from either the download terminal 120 or the portal / authentication server 500.

  From here, a user initial registration instruction 513, a user initial registration request 514, a user initial registration license information request 515, a user initial registration license information issuance 516, a user initial registration license information distribution 517, and a user initial registration control information distribution 518, content type determination 519, top priority DL processing 520, initial registration content acquisition request 521, initial registration content DL execution 522, DRM authentication 523, DRMID registration 524, and decryption key distribution 525 are the sequences of the present invention. Since it is the same as that of Embodiment 1, description is abbreviate | omitted.

  A DRMID registration completion notification 526 is transmitted from the portal / authentication server 500 to the provider server 501. Thereby, the provider server 501 associates the user ID with the terminal ID in step 527. If the DRMID registration of the download terminal 120 is not completed in the portal / authentication server 500, the provider server 501 cannot provide the content download service. Therefore, the provider server 501 obtains the DRMID registration completion notification 526, and the user ID and terminal ID Perform tying.

  By the initial registration content viewing guidance 528, the business server 501 prompts the download terminal 120 to view the initial registration content and confirms the playback on the download terminal 120, thereby confirming that the initial registration of the user has been completed. To inform.

  In the second embodiment, even when the provider server 501 does not have the function of the DRM server 250, it has been described in the related art in cooperation with the portal / authentication server 500 having the function of the DRM server 250. The first to fourth problems can be solved simultaneously. In addition, the provider server 501 can provide a service such as making a download reservation from a mobile phone and downloading the content to the download terminal by associating the user ID with the terminal ID as described above. There is an effect.

  The program of the present invention is a program that causes a computer to execute the operation of all or part of the steps of the download method, and is a program that operates in cooperation with the computer.

  The recording medium of the present invention is a recording medium that records a program that causes a computer to execute all or part of the steps of the download method of the present invention described above, and is readable by the computer. The read program is a recording medium for executing the operation in cooperation with the computer.

  Further, one usage form of the program of the present invention may be an aspect in which the program is recorded on a recording medium such as a ROM readable by a computer and operates in cooperation with the computer.

  Also, one use form of the program of the present invention is an aspect in which the program is transmitted through a transmission medium such as the Internet and a transmission medium such as light, radio wave, and sound wave, read by a computer, and operates in cooperation with the computer. Also good.

  The computer of the present invention described above is not limited to pure hardware such as a CPU, and may include firmware, an OS, and peripheral devices.

  As described above, the configuration of the present invention may be realized by software or hardware.

  According to the present invention, it is possible to realize a content rental service that downloads video and audio content via a network and permits reproduction with a viewing time limit. At that time, the initial registration of DRMID is realized at a high security level, the initial registration procedure is realized without requiring the user, and the two-step communication of user information registration and DRMID registration is linked. It has many remarkable effects and is useful for a service for downloading content from a server that distributes content such as movies and music to a PC, AV device, mobile phone, or portable device via a network.

Data structure diagram of control information according to the first embodiment of the present invention Block diagram of download terminal, web server, content server, and DRM server according to Embodiment 1 of the present invention Communication sequence diagram between servers and the like according to the first embodiment of the present invention Communication sequence diagram between servers and the like according to the second embodiment of the present invention First conventional example rental system configuration diagram Block diagram of download terminal, web server, content server, and DRM server of the first conventional example Data structure diagram of control information of first conventional example Sequence diagram between servers of the first conventional example Sequence diagram between servers of the second conventional example

Explanation of symbols

100 Download terminal 101 Router 102 Network I / F
103 Browser 104 Information display unit 105 Operation input unit 106 Information display 107 Operation input 108 Control information acquisition unit 109 Control information determination unit 110 DL control unit 111 Content acquisition unit 112 DRM client 113 Storage unit 114 Content management unit 115 Decoder 116 Playback unit 117 Playback output 118 DL control unit 120 Download terminal 150 Network 200 Web server 201 HTML distribution unit 202 Control information distribution unit 203 Control information distribution unit 220 Content server 221 Content distribution unit 222 Content storage unit 223 Initial registration content 224 Encrypted content 225 Content accumulation unit 240 DRM server 241 DRM authentication unit 242 DRMID registration unit 243 License information issue unit 244 License information / DRMID association storage unit 245 Decryption key distribution unit 300 Content Purchase / DL registration instruction 301 Content purchase / DL registration request 302 License information issuance request 303 License information issuance 304 License information distribution 305 Control information distribution 306 Content acquisition request 307 Content DL execution 308 Content selection / playback instruction 309 DRM authentication 310 Decryption key request 311 License Determination 312 Decryption Key Distribution 313 Content Playback 320 User Initial Registration Instruction 321 User Initial Registration Request 322 User Initial Registration License Information Request 323 User Initial Registration License Information Issue 324 User Initial Registration License Information Distribution 325 User Initial Registration Control Information distribution 326 Content type determination 327 Priority is given to DL processing 328 Initial registration content acquisition request 329 Initial registration content DL execution 330 DRM authentication 331 DRMID registration 332 Decryption Request 333 decryption key distribution 334 user initial registration completion notification 340 is first accessed 341 first access a determination 342 the registration information request 343 the registration information entered 344 the registration information transmitted 345 user registration performed 400 control information 401 content URL
402 DRM server URL
403 License information 404 Content discrimination information 410 Control information 420 DRMID
421 Encrypted content 422 Decryption key 440 Terminal ID

Claims (29)

A download terminal that downloads the content for user initial registration or the content for viewing from a server in which content for user initial registration and content for viewing are stored,
Obtaining from the server control information comprising at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing;
From the control information, when it is the content for the user initial registration, execute a download process for the user initial registration,
A download terminal that performs normal download processing when the content is for viewing based on the control information. The download terminal has a function of sequentially executing a plurality of download processes,
2. When the control information indicates that the content is for the user initial registration, the user registration content download process is preferentially performed over the viewing content. Download terminal described. In the download terminal,
At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The download terminal according to claim 1.   The download terminal according to claim 3, wherein the initial registration session information is stored in the license information included in the control information.   The download terminal according to claim 4, wherein the license information can be uniquely specified for the download terminal at least at the time of initial user registration.   4. The download terminal according to claim 3, wherein the user initial registration content and / or the viewing content stored in the server are encrypted encrypted content. .   7. The download terminal according to claim 6, wherein a terminal identifier necessary for authentication for acquiring a decryption key necessary for decrypting the encrypted content downloaded from the server is held in advance.   8. The download terminal according to claim 7, wherein the decryption key necessary for decrypting the encrypted content is uniquely specified by the terminal identifier and the license information. In the download process for the user initial registration,
When the download terminal completes downloading the user initial registration content from the server,
Without user operation instructions, input instructions, or content playback instructions,
8. The download terminal according to claim 7, wherein the download terminal makes a connection to the server using the terminal identifier and the license information, and registers the terminal identifier in the server through the connection. After the download terminal registers the terminal identifier in the server,
Obtaining the decryption key from the server;
By decrypting the user initial registration content downloaded to the download terminal with the decryption key and confirming the playback output,
The download terminal according to claim 7, wherein reliability of a communication path between the download terminal and the server is guaranteed. In a download method for downloading the content for user initial registration or the content for viewing from a server in which content for user initial registration and content for viewing are stored to a download terminal,
Obtaining from the server control information comprising at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing;
From the control information, when the content is for user initial registration, execute download processing for user initial registration,
According to the control information, when the content is for viewing, a normal download process is executed. The download method having a function of sequentially executing a plurality of download processes,
12. The download processing of content for user registration is performed with priority over content for viewing when the control information indicates content for user initial registration. How to download. In the download method,
At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The download method according to claim 11.   The download method according to claim 13, wherein the initial registration session information is stored in the license information included in the control information.   The download method according to claim 14, wherein the license information can be uniquely specified for the download terminal at least at the time of initial user registration. Both the user initial registration content and the viewing content stored in the server, or either one of them is encrypted encrypted content,
The download terminal holds in advance a terminal identifier necessary for authentication to obtain a decryption key necessary for decrypting the encrypted content downloaded from the server,
The decryption key necessary for decrypting the encrypted content is uniquely identified by the terminal identifier and the license information,
In the download process for the user initial registration,
When the download terminal completes downloading the user initial registration content from the server,
Without an operation instruction, input instruction, or content reproduction instruction from the user, the download terminal makes a connection to the server using the terminal identifier and the license information, and the terminal is connected to the server by the connection. 14. The download method according to claim 13, wherein an identifier is registered. A server that stores content for initial user registration and content for viewing and distributes to a download terminal,
Distributing control information composed of at least information indicating a download destination of the content, license information of the content, and information for determining the content for the initial user registration or the content for viewing to the download terminal. A server characterized by At least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The server according to claim 17.   The server according to claim 18, wherein the initial registration session information is stored in the license information included in the control information.   The server according to claim 19, wherein the license information can be uniquely specified for the download terminal at least at the time of initial user registration. A download system comprising a server storing content for user initial registration and content for viewing, and a download terminal for downloading the content for user initial registration or the content for viewing from the server,
The download terminal receives control information including at least information indicating a download destination of the content, license information of the content, and information for determining the content for initial user registration or the content for viewing. Get from
From the control information, when it is the content for the user initial registration, execute a download process for the user initial registration,
When the content is for viewing from the control information, a normal download process is executed. The download terminal has a function of sequentially executing a plurality of download processes,
24. When the control information indicates that the content is for the user initial registration, the user registration content download process is preferentially performed over the viewing content. The download system described. The download terminal is at least at the time of user initial registration,
The control information stores initial registration session information,
Further, the initial registration session information stored in the control information is used as an initial registration session when registering information necessary for user registration in the server from the download terminal to the server. The download system according to claim 21.   The download system according to claim 23, wherein the initial registration session information is stored in the license information included in the control information.   25. The download system according to claim 24, wherein the license information can be uniquely specified for the download terminal at least at the time of initial user registration. Both the user initial registration content and the viewing content stored in the server, or either one of them is encrypted encrypted content,
The download terminal holds in advance a terminal identifier necessary for authentication to obtain a decryption key necessary for decrypting the encrypted content downloaded from the server,
The decryption key necessary for decrypting the encrypted content is uniquely identified by the terminal identifier and the license information,
In the download process for the user initial registration,
When the download terminal completes the download of the content for the user initial registration from the server, without an operation instruction, input instruction, or content reproduction instruction from the user,
The download system according to claim 23, wherein the download terminal makes a connection to the server using the terminal identifier and the license information, and registers the terminal identifier in the server through the connection. After the download terminal registers the terminal identifier in the server, obtains a decryption key from the server,
By decrypting the user initial registration content downloaded to the download terminal with the decryption key and confirming the playback output,
27. The download system according to claim 26, wherein reliability of a communication path between the download terminal and the server is guaranteed.   The download method according to claim 11, causing the computer to execute the step of acquiring the control information from the server, the step of executing the download process for the initial user registration, and the step of executing the normal download process. program. A recording medium on which the program according to claim 28 is recorded, wherein the recording medium can be processed by a computer.

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