JP2011248431A - Content acquisition device, content server, content movement method, program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a content distribution service that is approved for implementation for respective contents to move contents to a removable storage medium while holding copy right.SOLUTION: A content acquisition device 100 comprises: a content reception part 107 for acquiring contents from a content server 200 through a network 115; a takeover information reception part 107 for acquiring takeover propriety information of copy right associated with when a content is moved to a removable storage medium 114, which is defined for respective contents, from the content server before a license for moving the acquired content is acquired; a takeover information presentation part 103 for presenting propriety of moving a content while holding copy right, to a user according to the acquired takeover propriety information; and a license reception part 113 for acquiring a license for moving from a license server 300 when an instruction for moving a content to the removable storage medium is received from a user.

Description

  The present invention relates to a content acquisition apparatus, a content server, a content moving method, and the like in a content download system that acquires content via a communication network.

  In recent years, home servers such as HDD (Hard Disk Drive) recorders that can be connected to the Internet access the content distributor's server via the Internet, and movies, dramas, etc. provided by the content distributor It is possible to select and purchase desired content from a wide variety of content, download (DL) the purchased content, store it on a fixed recording medium such as an HDD built in the recorder, and view and view it A content distribution service has been realized.

  In the future, in order to promote the spread of content distribution services, not only devices with HDDs but also recording content on removable recording media such as Blu-ray Disc (registered trademark) and SD cards without HDDs It is important that a device capable of browsing and viewing (for example, Internet TV) can support the content distribution service.

  The content processing in the conventional content distribution service will be described with reference to FIG.

  FIG. 5 is a diagram for explaining processing contents of content in a conventional content distribution service.

  In a conventional content distribution service, as shown in FIG. 5, a content acquisition device 500 such as an HDD recorder downloads content from a content providing device 510 such as a video distribution server and stores it in a built-in HDD 501.

  Then, when the content acquisition apparatus 500 acquires the viewing license for the content from the license providing apparatus 520, the content is permitted to be reproduced, and the content accumulated in the HDD 501 can be decrypted and output, and the connected display It can be output to 502 or the like for viewing.

  Further, when an export license for the content is acquired from the license providing apparatus 520, the content is permitted to be written to another recording medium, the content stored in the HDD 501 is decrypted, and the export is encrypted. Data can be written to the removable recording medium 503. For example, by writing to an SD card or the like as the removable recording medium 503, the content can be taken out and viewed by inserting the SD card into a portable terminal or the like.

  When such a content distribution service is performed, normally, as shown in Patent Document 1, content distributed from a distribution server corresponding to a content providing device and a license providing device, and a message including a license are incorporated in the terminal. Writing to a recording medium such as an HDD and storing it, and then performing a move output to the copyright management system of the removable recording medium is performed based on a license stored in the recording medium. The information included in this license generally includes move control information indicating whether or not the content is permitted to be moved, and copy right information including the number of times the content can be copied and the like. .

  When moving content from a terminal to a removable recording medium, whether or not the number of copies that can be copied is taken over by the removable recording medium depends on the DRM (Digital Rights Management; Marlin-IPTVES for download distribution) compliance rule (hereinafter referred to as CR). ).

JP 2006-85481 A

  However, when assuming a content distribution service in which the operation of moving content to a removable recording medium with the copy right indicating that copying can be performed a predetermined time is permitted for each content, the conventional content acquisition device I could not respond.

  In the conventional content acquisition apparatus, whether to transfer the number of possible copies to the removable recording medium when moving the content to the removable recording medium is determined for each content acquisition apparatus in accordance with the CR regulations. That is, for each content acquisition apparatus, either the process of moving the copyable number of times as it is or the process of moving without copying the copyable number of times is performed uniformly.

  In the case of a content acquisition device that moves without taking over the number of times that can be copied, it is not possible to move with the copy right, so of course, a content distribution service that allows the operation to move while holding the copy right for each content Cannot be realized.

  In the case of a content acquisition apparatus that takes over the number of times of copying as it is and moves it, for example, the number of times of copying that is passed from the server is 0 for content that does not permit copying, and 1 for content that permits copying. It is conceivable to set the above. However, in this case, for content that is not permitted to take over the copy right, the number of possible copies is set to 0, so that simple copying cannot be performed.

  As described above, in the conventional content acquisition apparatus, it is possible to realize a content distribution service in which the operation of moving while retaining the copy right is permitted for each content even using the move control information and the information on the number of times of copying is possible. could not.

  In consideration of the above-described conventional problems, the present invention can realize a content distribution service in which an operation of moving while retaining a copy right is permitted for each content, a content acquisition device, a content server, a content transfer method, and the like The purpose is to provide.

In order to solve the above-described problem, the first aspect of the present invention provides:
A content receiver for acquiring content from a content server via a network;
Before acquiring the license for moving the content acquired from the content server, information regarding whether or not to take over the copy right when moving the content to a removable recording medium specified for each content is obtained from the content server or the license. A takeover information receiving unit obtained from the server;
A takeover information presenting unit for presenting to the user whether or not the transfer that takes over the copy right of the content is possible based on the acquired takeover availability information;
Upon receiving an instruction to move the content from the user to the removable recording medium, a license receiving unit that acquires the transfer license from the license server;
A content acquisition apparatus comprising: a content moving unit configured to move the content to the removable recording medium based on the acquired transfer license.

The second aspect of the present invention
The content acquisition device according to the first aspect of the present invention, wherein the takeover information presentation unit presents the number of times the content can be copied when presenting to the user whether or not the movement that takes over the copy right of the content is possible. It is.

The third aspect of the present invention
The takeover information receiving unit acquires the takeover availability information from the content server,
The takeover permission / inhibition information acquired from the content server is the content acquisition apparatus according to the first aspect of the present invention, which is acquired by the content server from the license server.

The fourth aspect of the present invention is
The takeover information receiving unit is the content acquisition device according to the first aspect of the present invention, which acquires the takeover availability information when acquiring the content from the content server.

The fifth aspect of the present invention provides
A signature verification unit for confirming that the takeover availability information acquired by the takeover information receiving unit is valid information;
The license server is a DRM server;
The takeover availability information acquired by the takeover information receiving unit is signed by the license server,
The takeover information receiving unit obtains a server certificate when obtaining the takeover availability information,
The signature verification unit determines whether or not the takeover availability information is valid information based on a DRM root certificate, the server certificate, and the signature value that are held in advance. It is the content acquisition apparatus of this invention.

The sixth aspect of the present invention provides
A content transmission unit that distributes the content in which the copy right takeover permission information when moving to a removable recording medium is defined for each content to a content acquisition device via a network;
When the content acquisition request is received from the content acquisition device, the content server includes a takeover information transmission unit that distributes the takeover availability information to the content acquisition device when the content is distributed.

The seventh aspect of the present invention
When the takeover information transmitting unit receives the content acquisition request from the content acquisition device, the takeover information transmission unit acquires the takeover availability information from a license server that supplies a license for the content to the content acquisition device. It is the content server of 6th this invention which distributes information to the said content acquisition apparatus.

In addition, the eighth aspect of the present invention
In a content acquisition apparatus that has acquired content from a content server via a network, the method for moving the content to a removable recording medium,
For each content, information on whether or not to take over copy rights when moving the content to the removable recording medium is defined,
Before acquiring the transfer license for the content acquired from the content server, acquiring the transferability information of the content from the content server or the license server;
A takeover information presenting step for presenting to the user whether or not the transfer that takes over the copy right of the content is possible based on the takeover availability information acquired from the content server or the license server;
A transfer license acquisition step of acquiring the transfer license from the license server upon receiving an instruction to transfer the content from the user to the removable recording medium;
A content transfer method comprising: a content transfer step of transferring the content to the removable recording medium based on the transfer license acquired from the license server.

The ninth aspect of the present invention provides
A program for causing a computer to execute at least the takeover availability information acquisition step, the takeover information presentation step, the transfer license acquisition step, and the content transfer step of the content transfer method of the eighth aspect of the present invention.

The tenth aspect of the present invention is
A recording medium on which a program of the ninth aspect of the present invention is recorded, which can be processed by a computer.

  According to the present invention, it is possible to provide a content acquisition device, a content server, a content transfer method, and the like that can realize a content distribution service in which an operation of moving while retaining a copy right is permitted for each content.

1 is a block diagram showing the configuration of a content acquisition device, a content provision device, and a license provision device of the content download system according to the first embodiment of the present invention. The figure which shows the operation | movement and communication sequence of a content acquisition apparatus, a content provision apparatus, and a license provision apparatus when the content acquisition apparatus of Embodiment 1 of this invention moves content. The figure which shows each operation | movement and communication sequence of a content acquisition apparatus and a content provision apparatus when the content acquisition apparatus of Embodiment 1 of this invention purchases a content. The flowchart which shows the process sequence of the move condition determination part of Embodiment 1 of this invention. The figure for demonstrating the processing content of the content in the conventional content delivery service

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.

(Embodiment 1)
Below, the structure and operation | movement of the content download system of Embodiment 1 of this invention are demonstrated in detail.

  First, the configuration of the content download system according to the first embodiment will be described with reference to FIG.

  FIG. 1 is a block diagram illustrating the configuration of the content acquisition device 100, the content providing device 200, and the license providing device 300 according to the first embodiment.

  In the content download system according to the first embodiment, the content acquisition device 100 is connected to the content providing device 200 and the license providing device 300 provided by the content distribution company via the external communication network 115, and the content providing device 100 After purchasing and downloading the content desired by the user from the device 200, a move export license corresponding to the content is acquired from the license providing device 300, and the removable recording medium stored in the content acquisition device 100 is then acquired. System to move content.

  In FIG. 1, a content acquisition apparatus 100 according to the first embodiment is, for example, a recorder device having an HDD and an SD card slot, and includes a network I / F 101, a content purchase unit 102, a display unit 103, an input unit 104, and content acquisition. Information receiving unit 105, content acquisition instruction transmitting unit 106, content receiving unit 107, content accumulating unit 108, signature verification unit 109, move condition determining unit 110, move processing unit 111, license acquisition request transmitting unit 112, license receiving unit 113 and a media storage unit 114, and has a function of performing a corresponding process by determining a move condition of the content selected by the user at the time of processing when the user exports the content.

  The content receiving unit 107 corresponds to an example of the content receiving unit of the present invention, and corresponds to an example of a takeover information receiving unit. The display unit 103 is an example of the takeover information presenting unit of the present invention, the license receiving unit 113 is an example of the license receiving unit of the present invention, and the move processing unit 111 is an example of the content moving unit of the present invention. The communication network 115 is an example of the network of the present invention.

  The network I / F 101 is connected to the content providing apparatus 200 and the license providing apparatus 300 via the external communication network 115.

  The content purchase unit 102 communicates with the content providing apparatus 200 via the network I / F 101 and purchases content using the display unit 103 and the input unit 104.

  The display unit 103 presents information requested by the content purchase unit 102 and the move condition determination unit 110 to the user.

  The input unit 104 accepts a response by the user's remote control operation or the like to the information presented to the user on the display unit 103, and provides the accepted result to the content purchase unit 102 or the move processing unit 111.

  The content acquisition information reception unit 105 includes information such as an acquisition destination URL that is transmitted from the content providing apparatus 200 via the network I / F 101 and is necessary for the user to acquire the content that the purchase intention is indicated in advance. The acquisition HTML 150 is received, and the URL data included in the acquisition HTML 150 is provided to the content acquisition instruction transmission unit 106.

  The content acquisition instruction transmitting unit 106 requests the content providing apparatus 200 to acquire content via the network I / F 101 based on the acquisition destination URL provided from the content acquisition information receiving unit 105.

  The content etc. receiving unit 107 receives the content, content attached information, signed permission condition information, server certificate, and license ID transmitted from the content providing apparatus 200 and stores them in the content storage unit 108.

  Here, the content ancillary information is information for performing content operation and content display, and displays a content ID that is identification information for each content managed in the content providing apparatus 200, a content title, and the like. This is information including display information to be used.

  Here, in the permission condition information, in addition to the copy ID information including the content ID, the move control information indicating whether or not the content is permitted to be copied, the number of times the content can be copied, and the like, the move can be performed. It includes move permission / non-permission information indicating whether it is possible to take over the copy right to the previous medium.

  In addition, “Move control information” takes the value of “Move not possible” or “Moveable”, and “Move with / without copy number” indicates “Move with copy number” or “Move without copy number” value. It is a flag that takes

  The information about whether or not the number of copies can be moved is an example of information about whether or not to take over the copy right according to the present invention.

  The server certificate is information necessary for signature verification, and is authenticated by the DRM root certificate held in advance by the content acquisition apparatus 100.

  The license ID is identification information for each license managed in the license providing apparatus 300.

  The content storage unit 108 uses the signature verification unit 109 to confirm that the obtained licensed condition information with a signature has not been tampered with, and the content and the permission condition information from which the signature has been removed by the signature verification unit 109. Accumulate.

  The signature verification unit 109 performs signature verification on the permission condition information with the signature using the DRM root certificate held in advance by the content acquisition apparatus 100 and the server certificate provided from the content providing apparatus 200, If it has not been tampered with, the attached signature is removed and provided to the content storage unit 108.

  The move condition determination unit 110 determines a move condition based on the acquired permission condition information, and performs display corresponding to the move condition using the display unit 103. At the same time, according to the move condition, it is determined whether or not to accept a move processing request from the user, and a necessary operation menu is presented.

  The move processing unit 111 moves the content stored in the content storage unit 108 together with the license ID when the user instructs the move processing based on the display using the display unit 103 by the move condition determination unit 110. The license acquisition request transmission unit 112 is instructed to acquire the license, and the content is moved to the removable recording medium stored in the media storage unit 114 using the move export license acquired from the license reception unit 113. It is a processing unit.

  The license acquisition request transmission unit 112 makes a license acquisition request including the license ID to the license providing apparatus 300 via the network I / F 101 in accordance with the request from the move processing unit 111.

  The license receiving unit 113 receives a license transmitted from the license providing apparatus 300 via the network I / F 101 in response to a request from the license acquisition request transmitting unit 112 and provides the license to the move processing unit 111.

  The media storage unit 114 stores a removable recording medium that records content, such as an SD memory card (Secure Digital Memory Card).

  In FIG. 1, the content providing apparatus 200 according to the first embodiment is, for example, a video distribution server provided by a content distribution company, and includes a network I / F 201, a content registration unit 203, a content holding unit 204, and a content sales unit 205. An acquisition information transmission unit 206, a content acquisition instruction reception unit 207, a content transmission control unit 208, a license condition request transmission unit 209, a local network I / F 202, a license condition information reception unit 210, and a content etc. transmission unit 211. Yes.

  The content providing apparatus 200 corresponds to an example of the content server of the present invention. The content transmission unit 211 corresponds to an example of a content transmission unit of the present invention, and also corresponds to an example of a takeover information transmission unit.

  The network I / F 201 is connected to the content acquisition apparatus 100 via the external communication network 115. Further, the local network I / F 202 is connected to the license providing apparatus 300 via the local communication network 215.

  The content registration unit 203 is a registration unit that registers the content provided by the content providing apparatus 200 to the content acquisition apparatus 100 for sale and the content attached information.

  The content holding unit 204 is a data holding unit that stores the content registered by the content registration unit 203 and the content attached information.

  The content sales unit 205 communicates with the content acquisition apparatus 100 via the network I / F 201 to perform content purchase processing. After the purchase processing is completed, the content sales unit 205 transmits the acquisition information to the acquisition information transmission unit 206. Ask.

  The acquisition information transmission unit 206 transmits the acquisition HTML 150 to the content acquisition apparatus 100 via the network I / F 201.

  When the content acquisition instruction receiving unit 207 receives a content acquisition request from the content acquisition device 100 via the network I / F 201, the content acquisition instruction receiving unit 207 notifies the content transmission control unit 208.

  When the content transmission control unit 208 receives the content acquisition request, the content transmission control unit 208 requests the license condition request transmission unit 209 to acquire the license condition information including the ID of the content for which the acquisition request has been received. When the attached permission condition information, the server certificate, and the license ID are received, the content and content-attached information are acquired from the content holding unit 204, and the content transmission unit 211 is requested to transmit them.

  The license condition request transmission unit 209 sends a license condition acquisition request including the content ID to the license providing apparatus 300 via the local network I / F 202.

  The license condition information receiving unit 210 receives signed license condition information from the license providing apparatus 300 via the local network I / F 202.

  The content etc. transmitting unit 211 transmits the content provided from the content transmission control unit 208, content attached information, and signed permission condition information to the content acquisition apparatus 100 via the network I / F 201.

  In FIG. 1, a license providing apparatus 300 according to the first embodiment is, for example, a DRM server provided by a content distributor, and includes a network I / F 301, a local network I / F 302, a license condition information registration unit 303, a license condition. An information management unit 304, a license condition request receiving unit 305, a signature generation / giving unit 306, a license condition information transmitting unit 307, a license acquisition request receiving unit 308, and a license transmitting unit 309 are provided.

  Note that the license providing apparatus 300 corresponds to an example of a license server of the present invention.

  The network I / F 301 is connected to the content acquisition apparatus 100 via the external communication network 115. The local network I / F 302 is connected to the content providing apparatus 200 via the local communication network 215.

  The license condition information registration unit 303 is a registration unit that can register the license condition information corresponding to the content registered by the content providing apparatus 200 in association with the content ID.

  When the license condition information management unit 304 manages the license condition information registered by the license condition information registration unit 303 in association with the license, and receives a license condition acquisition request including the content ID from the license condition request reception unit 305, The corresponding license condition information is identified from the content ID, a signature is generated and assigned using the signature generation / giving unit 306, and the license condition information transmitting unit 307 is combined with the signed license condition information, the server certificate, and the license ID. It is a management department to provide to.

  The license condition request reception unit 305 receives a license condition acquisition request from the content providing apparatus 200 via the local network I / F 302 and notifies the license condition information management unit 304 of the request.

  The license condition information transmission unit 307 provides the license condition information with the signature and the license ID to the content providing apparatus 200 via the local network I / F 302.

  When the license acquisition request reception unit 308 receives a license information provision request for permitting a move including a license ID from the content acquisition apparatus 100 via the network I / F 301, the license acquisition request reception unit 308 notifies the license transmission unit 309 to that effect. .

  The license transmission unit 309 confirms the license conditions of the license condition information management unit 304 from the license ID included in the license information provision request. If the move process is permitted, the license transmission unit 309 transmits the license information corresponding to the license ID to the network I / O. It transmits to the content acquisition apparatus 100 via F301.

  Next, the operation of the content download system according to the first embodiment will be described.

  First, FIG. 2 shows operations and communication sequences of the content acquisition device 100, the content providing device 200, and the license providing device 300 of the content download system according to the first embodiment.

  First, content is registered in the content providing apparatus 200 (step S401). Also, permission condition information corresponding to the use permission condition of the content registered in the license providing apparatus 300 is set (step S402).

  The user purchases content through the content purchase unit 102 (step S403). Details of the content purchase step S403 will be described later.

  After the content purchase step S403, the content providing apparatus 200 transmits to the content acquisition apparatus 100 a content acquisition screen including content acquisition information that is information necessary for content acquisition such as a URL for downloading the content purchased by the user. (Step S404). The content acquisition device 100 presents the content acquisition screen received from the content providing device 200 to the user, and when the user instructs content acquisition (step S405), the content acquisition device 200 issues a content acquisition request using the content acquisition information. (Step S406).

  The content providing apparatus 200 issues an acquisition request to the license providing apparatus 300 for permission condition information corresponding to the content for which the acquisition request has been received (step S407). The license providing apparatus 300 generates and attaches a signature for preventing falsification to the permission condition information set in step S402 (step S408). The license providing apparatus 300 sends the signed permission condition information to the content providing apparatus 200 (step S409). The content providing apparatus 200 sends the signed permission condition information acquired from the license providing apparatus 300 and the content to the content acquiring apparatus 100 (step S410).

  The content acquisition apparatus 100 verifies the signature attached to the acquired signed license condition information, and confirms that the license condition information is valid information and has not been tampered with (step S411). The content acquisition apparatus 100 presents to the user that the content acquisition has been completed and the move condition related to the acquired content (step S412). Here, the term “move condition” refers to information that is presented by the terminal judging the permission condition regarding the move based on the acquired permission condition information.

  The user instructs the move process with reference to the presented move condition (step S413). The content acquisition apparatus 100 requests the license providing apparatus 300 to acquire an export license for the move (step S414). The license providing apparatus 300 sends the export license for the move to the content acquisition apparatus 100 (step S415). The content acquisition apparatus 100 performs a move process (step S416).

  The move export license corresponds to an example of the transfer license of the present invention. Further, the process of step S410 corresponds to an example of the takeover availability information acquisition step of the present invention, and the process of step S412 corresponds to an example of the takeover information presentation step of the present invention. Further, the processing of step S414 and step S415 corresponds to an example of the transfer license acquisition step of the present invention. Further, the process of step S416 corresponds to an example of a content movement step of the present invention.

  Next, the content purchase step S403 will be described in detail with reference to FIG.

  FIG. 3 shows respective operations and communication sequences of the content acquisition device 100 and the content provision device 200 when the content provision device 100 purchases the content.

  In order to specify the content to be purchased, the user first instructs to display the content provided by the content providing apparatus 200 (step S420).

  Upon receiving the instruction to display the provided content from the user, the content acquisition apparatus 100 transmits an instruction to display the provided content to the content providing apparatus 200 (step S421). When the content providing apparatus 200 receives the provided content display instruction, the content providing apparatus 200 generates a content list screen to be provided (step S422), and transmits the generated provided content list screen to the content acquisition device 100 (step S423). Then, the content acquisition apparatus 100 displays the received provided content list screen (step S424).

  When the user selects content desired to purchase from the displayed provided content list screen (step S425), the content acquisition device 100 transmits an instruction of the content selected by the user to the content providing device 200 ( Step S426).

  The content providing apparatus 200 that has received the selected content instruction extracts confirmation data necessary for determining whether or not the content acquisition apparatus 100 can acquire the selected content from the content information (step S427). A content acquisition confirmation request including the confirmation data is transmitted to the content acquisition device 100 (step S428).

  The content acquisition apparatus 100 displays detailed information on the content received from the content providing apparatus 200, along with a display for selecting a medium for recording the content (step S429). When the user issues a purchase instruction (step S430), the content acquisition apparatus 100 transmits a purchase instruction to the content providing apparatus 200 (step S431).

  Upon receiving the content acquisition result from the content acquisition device 100, the content providing device 200 generates a screen for inputting information necessary for purchasing the content, and transmits the screen to the content acquisition device 100 (step S432). ). The content acquisition apparatus 100 displays the received purchase information input screen (step S433), and allows the user to input information necessary for purchase such as a credit number (step S434). The content acquisition apparatus 100 transmits the input user information to the content providing apparatus 200 (step S435).

  The content providing apparatus 200 collates the received user input information and performs content purchase confirmation processing (step S436), and when the content purchase confirmation processing is completed, the URL for downloading the content purchased by the user A content acquisition screen including information necessary for content acquisition is transmitted to the content acquisition device 100 (step S404).

  As described above, content purchase can be performed and preparation for acquiring content can be made.

  Next, a determination processing procedure in the move condition determination unit 110 of the content acquisition apparatus 100 will be described with reference to FIG. FIG. 4 is a flowchart illustrating a determination processing procedure in the move condition determination unit 110 according to the first embodiment.

  The move condition determination unit 110 of the content acquisition apparatus 100 starts determining the move condition of the acquired content (step S450), and determines whether or not the content is permitted to move by checking the move control information. (Step S451). As a result, if the move control information indicates “move is not possible”, the content is determined to be “move is not possible”, and a message to that effect is presented to the user and the move process is not performed (step S452).

  In step S451, when the move control information indicates “move permitted”, the move condition determination unit 110 confirms the copy count information (step S453). As a result, if there is no copy right, or there is a copy right but the number of times that copying is possible is 0, the content is determined to be “movable and has no copy right at the move destination”, and this is indicated to the user. Then, the move process is permitted (step S454).

  In step S453, if there is a copy right and the number of possible copies is 1 or more, the move condition determination unit 110 confirms the move availability information with the number of copies (step S455). As a result, if a move with the number of copies is possible, it is determined that the content is “Moveable, copy right can be taken over to the move destination”, and that is shown to the user and the move process is permitted (step S456). ). On the other hand, if the move with the number of copies cannot be performed, the content is determined to be “movable, copy right cannot be transferred to the move destination”, and this is shown to the user and the move process is permitted (step S457). .

  In step S454, step S456, and step S457, when the move condition is presented to the user, the number of times of copying may be presented.

  As described above, in the content download system according to the first embodiment, prior to the content acquisition device 100 moving the content to the removable recording medium, the content acquisition device 100 moves with the number of copies specified for each content. Acquires permission information and presents to the user whether or not the copy right can be taken over based on the move permission information with the number of times of copying, thus realizing a content distribution service in which the operation of moving while holding the copy right is permitted for each content can do.

  In the content download system of the first embodiment, the user refers to the move condition based on the permission condition set for each content before acquiring the export license for the move, and acquires the export license for the move. It becomes possible to determine necessity. As a result, it is possible to prevent obtaining an export export license that is unnecessary for the user.

  In this way, by using the present invention, it is possible for the content acquisition apparatus to grasp the move condition for each content prior to the acquisition of the export license when the download content is moved. Therefore, it is possible to contribute to the realization of a move with a copy right.

  In the first embodiment, signature generation and assignment to the permission condition information is performed when a content acquisition request is issued from the content acquisition apparatus 100, but the timing of signature generation and assignment to the permission condition information is limited to this. Instead, the signature may be statically generated and assigned prior to content acquisition, such as when content is registered.

  In the first embodiment, the signature is added to the license condition information provided by the content providing apparatus 200 to the content acquisition apparatus 100. However, even if the signature is not added to the license condition information, the copy right is retained. Thus, it is possible to realize a content distribution service in which the operation of moving the content is permitted for each content. However, in order to avoid illegally losing the user's copy right due to malicious alteration by a third party to the move condition, a signature is attached to the permission condition information as shown in the first embodiment, and the content It is desirable to provide move conditions securely to the acquisition device.

  Further, in the first embodiment, when the content acquisition apparatus 100 acquires content, the permission condition information including the copy permission / inhibition information with the number of times of copying is acquired. The license condition information may be acquired at any time before the export license is acquired.

  For example, when the permission condition information is acquired in the content purchase step S403, it is possible to present to the user whether or not the copy right for each content can be taken over at the time of content purchase. It can be used as a material for determining the necessity of purchase. In addition, the content distributor prepares two types of content for the same content: “content that can be transferred when copying” and “content that cannot transfer when copying” A user who purchases content may be allowed to select which content to purchase. In this case, the price of the content may be different between “contents that can be copied when transferring” and “contents that cannot transfer when copying”.

  In the first embodiment, the content acquisition apparatus 100 acquires the permission condition information from the content providing apparatus 200. However, the content is acquired from the content providing apparatus 200, and the permission condition corresponding to the content is acquired. Information may be acquired from the license providing apparatus 300.

  In the first embodiment, a configuration has been described in which a plurality of devices, that is, the content providing device 200 and the license providing device 300, are provided as devices that provide content and licenses. However, instead of the content providing device 200 and the license providing device 300, In addition, it may be configured as a single server device having a function of providing content and a license.

  In the move condition determination process according to the first embodiment, whether or not a move with a copy count is possible is confirmed following the confirmation of the copy count information, but the type of the removable recording medium to be moved is appropriately checked. In this case, unnecessary determinations may be reduced. For example, before confirming the copy number information, it may be confirmed whether the medium does not support the move with the copy number.

  Note that the program of the present invention causes a computer to execute at least the operations of the takeover availability information acquisition step, the takeover information presentation step, the transfer license acquisition step, and the content transfer step of the above-described content transfer method. Which is a program that operates in cooperation with a computer.

  In addition, the program recording medium of the present invention executes at least the operations of the above-described content transfer method by the computer such as the takeover availability information acquisition step, the takeover information presentation step, the transfer license acquisition step, and the content transfer step. A program recording medium that records a program for causing the computer to read the program, and is a program recording medium that is readable by a computer and that is used in cooperation with the computer.

  The “step operation” of the present invention means the operation of all or part of the step.

  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.

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

  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.

  The content acquisition device, the content server, the content moving method, and the like according to the present invention have the effect of realizing a content distribution service in which the operation of moving while retaining the copy right is permitted for each content. This is useful as a content acquisition device, a content server, a content transfer method, and the like in a content download system that acquires content via the Internet.

100 content acquisition device 101 network I / F
DESCRIPTION OF SYMBOLS 102 Content purchase part 103 Display part 104 Input part 105 Content acquisition information receiving part 106 Content acquisition instruction | indication transmission part 107 Content etc. receiving part 108 Content storage part 109 Signature verification part 110 Move condition determination part 111 Move processing part 112 License acquisition request transmission Unit 113 License receiving unit 114 Media storage unit 115 Communication network 200 Content providing apparatus 201 Network I / F
202 Local network I / F
203 Content Registration Unit 204 Content Holding Unit 205 Content Sales Unit 206 Acquisition Information Transmitting Unit 207 Content Acquisition Instruction Receiving Unit 208 Content Transmission Control Unit 209 License Condition Request Transmitting Unit 210 License Condition Information Receiving Unit 211 Content etc. Transmitting Unit 215 Local Communication Network 300 License Providing Device 301 Network I / F
302 Local network I / F
303 License Condition Information Registration Unit 304 License Condition Information Management Unit 305 License Condition Request Receiving Unit 306 Signature Generation Giving Unit 307 License Condition Information Transmitting Unit 308 License Acquisition Request Receiving Unit 309 License Transmitting Unit

Claims (10)

A content receiver for acquiring content from a content server via a network;
Before acquiring the license for moving the content acquired from the content server, information regarding whether or not to take over the copy right when moving the content to a removable recording medium specified for each content is obtained from the content server or the license. A takeover information receiving unit obtained from the server;
A takeover information presenting unit for presenting to the user whether or not the transfer that takes over the copy right of the content is possible based on the acquired takeover availability information;
Upon receiving an instruction to move the content from the user to the removable recording medium, a license receiving unit that acquires the transfer license from the license server;
A content acquisition apparatus comprising: a content moving unit configured to move the content to the removable recording medium based on the acquired transfer license.   The content acquisition apparatus according to claim 1, wherein the takeover information presenting unit also presents the number of times the content can be copied when presenting to the user whether or not the movement that takes over the copy right of the content is possible. . The takeover information receiving unit acquires the takeover availability information from the content server,
The content acquisition apparatus according to claim 1, wherein the takeover availability information acquired from the content server is acquired by the content server from the license server.   The content acquisition apparatus according to claim 1, wherein the takeover information receiving unit acquires the takeover availability information when acquiring the content from the content server. A signature verification unit for confirming that the takeover availability information acquired by the takeover information receiving unit is valid information;
The license server is a DRM server;
The takeover availability information acquired by the takeover information receiving unit is signed by the license server,
The takeover information receiving unit obtains a server certificate when obtaining the takeover availability information,
The signature verification unit determines whether the takeover availability information is valid information based on a DRM root certificate, the server certificate, and a value of the signature that are held in advance. The content acquisition device according to 1. A content transmission unit that distributes the content in which the copy right takeover permission information when moving to a removable recording medium is defined for each content to a content acquisition device via a network;
A content server, comprising: a takeover information transmission unit that delivers the takeover availability information to the content acquisition device when the content acquisition request is received from the content acquisition device.   When the takeover information transmitting unit receives the content acquisition request from the content acquisition device, the takeover information transmission unit acquires the takeover availability information from a license server that supplies a license for the content to the content acquisition device. The content server according to claim 6, wherein information is distributed to the content acquisition device. In a content acquisition apparatus that has acquired content from a content server via a network, the method for moving the content to a removable recording medium,
For each content, information on whether or not to take over copy rights when moving the content to the removable recording medium is defined,
Before acquiring the transfer license for the content acquired from the content server, acquiring the transferability information of the content from the content server or the license server;
A takeover information presenting step for presenting to the user whether or not the transfer that takes over the copy right of the content is possible based on the takeover availability information acquired from the content server or the license server;
A transfer license acquisition step of acquiring the transfer license from the license server upon receiving an instruction to transfer the content from the user to the removable recording medium;
A content transfer method comprising: a content transfer step of transferring the content to the removable recording medium based on the transfer license acquired from the license server.   9. A program for causing a computer to execute at least the takeover availability information acquisition step, the takeover information presentation step, the transfer license acquisition step, and the content transfer step of the content transfer method according to claim 8.   A recording medium on which the program according to claim 9 is recorded, wherein the recording medium can be processed by a computer.

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