JP5075509B2 - Content movement system and information terminal - Google Patents

Description

The present invention relates to a content movement system and an information terminal .

  In recent years, contents such as music, video, and images have been distributed via a network. Content distributed over the network may be corrupted due to a failure on the information terminal side. In order to be safe even if data corruption occurs, it is necessary to take measures such as taking a backup copy in an external storage device. However, if an unlimited number of copies are allowed in an external storage device, it will lead to unauthorized copying of content, which is not appropriate.

  Therefore, in order to prevent the unauthorized copying of the content while allowing the backup copy of the content, there is a content protection method in which the distributed content is stored in the memory in an encrypted state using the identification information unique to the information terminal as a key. Are known. According to this method, the encrypted content is backed up and copied to an external storage device, and even if the encrypted content copied by backup is read from another information terminal, it is decrypted because it does not have the encryption key. I can't. In addition, when identification information unique to an information terminal is used, even if the user is the same, if the content is backed up and copied to an information terminal different from the information terminal from which the content was first acquired, the information terminal can decrypt it. I can't.

Therefore, when the content is backed up and copied from the information terminal to the backup device, the encryption using the identification information unique to the information terminal as a key is converted into the encryption using the identification information unique to the user as a key, and the backup device When storing and acquiring content from the backup device, there is a method of reading by converting from encryption using identification information unique to the user to encryption using identification information unique to the information terminal to the key (For example, refer to Patent Document 1).
JP 2006-301887 A

  In Patent Document 1, when content is stored in the information terminal a, it is encrypted and stored using identification information unique to the information terminal a as a key. When copying to the backup device, the content is converted to be encrypted by using a unique key (for example, a telephone number in the case of a mobile phone) for each user. Further, when the other information terminal b obtains the content from the backup device, the decryption is performed using the identification information unique to each user as a key, and further encrypted using the identification information unique to the information terminal b as a key. is there.

  When this method is used, the information terminal b that acquires content from the backup device must be an information terminal that is managed by the same user as the information terminal a in order to perform decryption using unique identification information for each user as a key. For this reason, the content cannot be transferred to another user.

  Furthermore, when the information terminal b acquires content from the backup device, there is a problem in that the backup copied content cannot be accessed if the unique key is changed for each user used at the time of backup. This problem arises when, for example, the user cancels the mobile phone a and contracts the mobile phone b having a new phone number with a mobile phone that uses the phone number as a key.

The present invention has been made to solve the above-described problems, and an object thereof is to realize a content moving system and an information terminal that move content from one information terminal to another information terminal while protecting the content. And

In order to achieve the above object, a content moving system according to the present invention comprises a storage means for storing content, content identification information for identifying the content, and a content identification information list for managing the use restriction status of the content, and an external storage. An external connection means for connecting the apparatus, a communication means for communicating with other information terminals, a management apparatus connection means for communicating with a management apparatus for managing identification information of information terminals capable of moving content, and controlling the own terminal A content movement system comprising a first information terminal and a second information terminal having a control means , wherein the first information terminal manages first identification information assigned to the first information terminal. The identification information of the information terminal capable of moving content is acquired from the management device by transmitting to the management device by the device connection means, The content identification information and the identification information of the content movable information terminal are transmitted to the second information terminal by the communication means, and the second information terminal identifies the content movable information terminal acquired by the communication means. The information is compared with the second identification information assigned to the second information terminal, and if they match, the identification information of the content received by the communication means is associated with information indicating that the content can be reproduced. Registered in the content identification information list of the storage means, and the second identification information is transmitted to the first information terminal by the communication means, and the first information terminal is received at least by the communication means The content is encrypted with the key created using the second identification information, and the content identification information is regenerated by the content. Registered in the content identification information list of the storage means in association with information indicating that is impossible, a second information terminal or the external storage connected by an external connection means connected by a communication means the encrypted content and storage device, the second information terminal, when acquiring the encrypted content, decrypts the key generated using at least the second identification information of this content, the content identification of the decrypted content If the information is not registered in the content identification information list of the second information terminal in a non-reproducible state, the decrypted content is stored or reproduced in the storage means.

  According to the content moving system and the information processing apparatus of the present invention, it is possible to move content from one information terminal to another information terminal while protecting the content.

  Embodiments of the present invention will be described below with reference to the drawings.

  Embodiment 1 is an example in which content is moved from one information terminal to the other information terminal using an external storage medium. It is assumed that the information terminal used for content reproduction is a mobile phone. Also, when moving content from one mobile phone to another mobile phone with a different phone number, it may be possible to store the content from one mobile phone to an external storage medium and then move it to the other mobile phone. A case where the mobile phone is moved from one mobile phone to the other mobile phone using near field communication or the like is also conceivable. Hereinafter, for the sake of explanation, a case where content is moved via an external storage medium is taken as an example.

(System configuration)
FIG. 1 is a diagram illustrating a configuration of a content movement system according to the present embodiment. First, the system configuration of this content movement system will be described. This content movement system is composed of a mobile phone 1, a mobile phone 2, an external storage medium 3, a data communication network 4, and a content server 5.

  The external storage medium 3 is realized by a portable storage device such as a memory card. A storage unit built in an information processing apparatus such as a PC may be used as the external storage medium 3. The external storage medium 3 includes an external interface unit 131 and a storage unit 132, and is connected to the mobile phone 1 and the mobile phone 2 by the external interface unit 131.

  The mobile phone 1 and the mobile phone 2 are connected to the external storage medium 3 and can store data in the external storage medium 3 and read data stored in the external storage medium 3. As a result, the data stored in the mobile phone 1 is stored in the storage unit 132 of the external storage medium 3, and the mobile phone 2 reads the data from the storage unit 132 so that the mobile phone 1 passes through the external storage medium 3. And the cellular phone 2 can exchange data.

  In addition, the mobile phone 1 and the mobile phone 2 can transmit and receive voice signals and data signals to and from each other via the data communication network 4. A content server 5 is also connected to the data communication network 4, and the mobile phone 1 and the mobile phone 2 can download content from the content server 5 via the data communication network 4. Further, the cellular phone 1 and the cellular phone 2 can transmit and receive information by infrared communication or near field communication such as Bluetooth (registered trademark).

(Configuration of mobile phone)
Next, the configuration of the mobile phone 1 will be described. Since the mobile phone 1 and the mobile phone 2 have the same configuration, description of the configuration of the mobile phone 2 is omitted.

  The mobile phone 1 includes a control unit 51 that controls the entire mobile phone 1. The control unit 51 includes a storage unit 52, a content reproduction unit 53, a content protection unit 54, an external interface unit 55, a communication unit 56, a signal processing unit 57, a display unit 58, an input unit 59, an infrared communication unit via an internal bus. 60 is connected. The storage unit 52 stores setting information, software, and the like of the mobile phone 1, and also stores content 52a. It is assumed that the content 52a is data that must be prevented from being illegally copied. The storage unit 52 stores a checkout content ID list 52b. Information registered in the checkout content ID list 52b will be described later.

  The content reproduction unit 53 reproduces the content 52 a stored in the storage unit 52 of the mobile phone 1 or the storage unit 132 of the external storage medium 3. When the mobile phone 1 acquires the content 52 a stored in the external storage medium 3, the mobile phone 1 and the external storage medium 3 are connected via the external interface unit 55. The external interface unit 55 mediates exchange of data between the mobile phone 1 and the external storage medium 3 in accordance with a processing procedure defined by the standard.

  The content 52a in the mobile phone 1 may be encrypted or not encrypted. If it is encrypted, it must be decrypted before being played back by the content playback unit 53. If not encrypted, when the content 52a is moved to the external storage medium 3, the content 52a is encrypted and then moved to the external storage medium 3. In the following description, it is assumed that the content 52a is not encrypted in the mobile phone 1. The content protection unit 54 performs encryption processing and decryption processing of the content 52a.

  The communication unit 56 transmits / receives various information to / from other information devices via the data communication network 4. An antenna is connected to the communication unit 56 to perform wireless communication.

  The signal processing unit 57 is configured by a DSP (Digital Signal Processor) or the like. The signal processing unit 57 processes digital signals such as image data and digitized audio signals. For example, when audio transmission is performed, the audio acquired by the microphone is converted into a digital signal, encoded and error controlled, and then transmitted by the communication unit 56.

  The display unit 58 is configured by a display or the like. The display unit 58 displays an operation screen, a still image, a moving image, and the like. The input unit 59 includes operation keys and the like, and transmits a user instruction to the control unit 51. The infrared communication unit 60 is used to transmit and receive various information (for example, image data, music data, etc.) with a device capable of infrared communication.

(Content download)
When the mobile phone 1 having the above configuration downloads content from the content server 5 via the data communication network 4, the content server 5 determines the content ID based on the content of the downloaded content, the download time, and the like. To do.

For this reason, even if the same content is downloaded from the same content server 5, it does not have the same content ID. The cellular phone 1 manages the content ID and the content data together as the content 52a.

(Content encryption)
When the mobile phone 1 stores the content 52a downloaded from the content server 5 in the external storage medium 3, the content file 132a including at least the content 52a is stored. At this time, the content 52a included in the content file 132a is stored after being encrypted with a key created using at least identification information unique to the user. The identification information unique to the user may be a telephone number, for example. In this way, an encryption method using a telephone number is called “telephone number binding”. Hereinafter, description will be made assuming that the encryption method of the content 52a is telephone number binding.

  The content file 132 a stored in the external storage medium 3 may be acquired by the mobile phone 1 or the mobile phone 2. When the mobile phone 1 or the mobile phone 2 acquires the content file 132a stored in the external storage medium 3 and decrypts the content 52a, the mobile phone 1 or the mobile phone 2 decrypts the content 52a using at least a key created using the telephone number of the own terminal.

For this reason, the content 52a cannot be decrypted unless it is encrypted with a key created using the telephone number of the terminal itself. Therefore, when the mobile phone 1 stores the content file 132a in the external storage medium 3, the mobile phone 1 encrypts the content 52a depending on which mobile phone acquires the content file 132a from the external storage medium 3. Change the phone number used for. The phone number used for encryption may be a phone number of the mobile phone 1 or a phone number different from the phone number of the mobile phone 1.

  The case where the phone number used for encryption is the phone number of the mobile phone 1 means that the mobile phone 1 itself that stores the content file 132a in the external storage medium 3 acquires the content file 132a, or acquires the content file 132a. Mobile phone 2 taking over the phone number of mobile phone 1 (for example, when the model of mobile phone 1 is changed to mobile phone 2 or when an IC card with a phone number recorded such as a SIM card is used) A case where the mobile phone 1 is replaced with the mobile phone 2). Hereinafter, the encryption with the telephone number of the mobile phone 1 and the storage in the external storage medium 3 will be referred to as “backup copy”.

  FIG. 2 is a flowchart showing processing when the mobile phone 1 performs backup copy. The content protection unit 54 of the control unit 51 obtains the telephone number of the terminal (mobile phone 1) (S151), and encrypts the content 52a with a key created using this telephone number (S152). Then, the control unit 51 sends the content file 132a including the encrypted content 52a to the external storage medium 3 connected by the external interface unit 55, and makes a backup copy (S153).

  On the other hand, each user may be different from the case where the telephone number used for encryption is different from the telephone number of the mobile phone 1. Further, even if the user is the same, there may be a case where one user contracts a plurality of mobile phones, or there is a case where the mobile phone 1 is canceled and the mobile phone 2 is contracted.

  As described above, when the mobile phone 2 having a different phone number from the mobile phone 1 acquires the content file 132a, the phone number used for encryption of the content 52a is changed from the phone number of the mobile phone 1 to the phone number of the mobile phone 2. And is stored in the mobile phone 2 after being encrypted with the phone number of the mobile phone 2. This process is referred to as “telephone number bind conversion”. In the following, when the telephone number bind conversion is performed, sending the content file 132a from the mobile phone 1 is referred to as “checkout”, and the phone number of the mobile phone 1 is referred to as “checkout phone number”. On the other hand, the acquisition of the content file 132a by the mobile phone 2 is referred to as check-in, and the phone number of the mobile phone 2 is referred to as “check-in phone number”.

  When the content file 132a is checked out from the cellular phone 1 to the cellular phone 2, the content 52a is not sufficiently protected so that the cellular phone 1 can reproduce the content 52a. Therefore, when telephone number binding conversion is performed, whether or not the content file 132a can be reproduced or moved is managed using the check-out content ID lists 52b and 102b.

  FIG. 3 is an example of registration of the checkout content ID lists 52b and 102b. Items registered in the checkout content ID lists 52b and 102b are a content ID, a status flag, and a telephone number. The content ID registered in the check-out content ID lists 52b and 102b is the content ID of the content 52a selected by the user as the target of telephone number bind conversion. The status flag and telephone number items are registered for the content 52a having this content ID. In the status flag item, a status flag indicating the current status is stored in accordance with the process described later, among the three types of “checkout OK”, “checkin OK”, and “checkin NG”. In addition to storing the status flag, information is stored in the item for the telephone number.

  A telephone number bind conversion process using such checkout content ID lists 52b and 102b will be described. FIG. 4 is a sequence diagram showing a process of converting the content file 132a from the telephone number of the cellular phone 1 to the telephone number of the cellular phone 2 by telephone number binding conversion.

  Steps S201 to S206 in FIG. 4 are processes in the previous stage for executing the telephone number bind conversion. First, this process will be described. The cellular phone 1 extracts the content ID of the content to be subjected to telephone number bind conversion in accordance with a command from the input unit 59 (S201). Here, the content ID selected by the user from the input unit 59 may be singular or plural. The extracted content ID is registered in the checkout content ID list 52b of the mobile phone 1 (S202). At this time, the state flag is set to a “check-in NG” state, and nothing is registered in the telephone number item. The state of “check-in NG” indicates that the check-in of the content corresponding to the registered content ID is not permitted, and the reproduction is not permitted even if this content is stored in the own terminal.

  Then, the cellular phone 1 transmits a registration request to the checkout content ID list to the cellular phone 2 (S203). When this registration request is transmitted, the check-out telephone number and the content ID registered in the check-out content ID list 52b in step S202 are transmitted. Transmission / reception of information between the mobile phone 1 and the mobile phone 2 is performed by short-range wireless communication such as infrared communication or Bluetooth (registered trademark). The mobile phone 2 receives the content ID and the check-out telephone number transmitted from the mobile phone 1, and registers this content ID in the check-out content ID list 102b. At this time, the status flag is set to “check-in OK”, and the received check-out telephone number is registered in the telephone number field (S204). The “check-in OK” state represents that the content corresponding to the registered content ID can be checked in.

  Then, the mobile phone 2 transmits a check-in phone number, which is the phone number of its own terminal, to the mobile phone 1 (S205). The mobile phone 1 receives this and updates the information in the checkout content ID list 52b (S206). At this time, the state flag is set to “checkout OK”, and the check-in telephone number is registered in the telephone number item. The “checkout OK” state indicates that the content corresponding to the registered content ID is in a state where it can be checked out.

  When the communication in steps S203 and S205 is disconnected, the update of the checkout content ID list in step S206 cannot be completed. If the update cannot be completed, the content 52a is stored in the check-out content ID list 52b of the mobile phone 1 as a “check-in NG” state and cannot be played back on the mobile phone 1. Therefore, when the process of step S206 is incomplete, the registration of the checkout content ID list 52b is deleted.

  When the processing from step S201 to step S206 is completed, the telephone number bind conversion can be performed from the mobile phone 1 to the mobile phone 2 at any time. From this state, the processing may be continued to step S207 to complete the telephone number bind conversion. Alternatively, the processing may be interrupted when the process is completed up to step S206, and the telephone number bind conversion from step S207 may be executed when the user inputs an instruction to execute the telephone number bind conversion through the input unit 59. When the user inputs an instruction to execute telephone number bind conversion, the user receives an instruction input by displaying a screen display as shown in FIG.

  Next, telephone number bind conversion processing (step S207 to step S211) will be described. The mobile phone 1 acquires a check-in telephone number from the check-out content ID list 52b (S207). At this time, if the status flag corresponding to the content ID of the content to be checked out is not “check out OK”, the check-in telephone number is not registered in the telephone number field, so that the check-in telephone number cannot be acquired. Can not.

  After acquiring the check-in phone number, the mobile phone 1 configures check-in information including at least the check-in phone number, and encrypts the check-in information with a key created using the check-out phone number. The check-in information encrypted with the key created using the check-out telephone number is registered in the content file 132a as shown in FIG. 6 (S208).

  As described above, of the information included in the content file 132a, the check-in information is encrypted using the check-out telephone number, but the content 52a is encrypted using a key created using the check-in telephone number. (S209). Then, the status flag of the check-out content ID list 52b is changed to “check-in NG” (S210). As a result, the content file 132 a checked out from the mobile phone 1 is not reproduced by the mobile phone 1. The content file 132a processed as described above is stored in the external storage medium 3 (S211).

  As described above, when the phone number bind conversion is performed, the content ID of the content 52a checked out from the mobile phone 1 is registered in the check-out content ID list 52b of the mobile phone 1 in the state of “check in NG”. It becomes impossible to reproduce the content 52a on the mobile phone 1 that is the source of the out. Thus, since playback on the mobile phone 1 is restricted and a plurality of mobile phones cannot be specified as check-in destinations, the content file 132a is acquired from the external storage medium 3 and included in the content file 132a. The number of mobile phones that can reproduce the content 52a can be limited to one or less.

(Content playback)
Next, processing when the mobile phone 2 acquires the content file 132a stored in the external storage medium 3 as described above will be described with reference to FIG. Further, a specific example of the movement of the content file 132a will be described with reference to FIGS. 8 to 10, and processing performed by the mobile phone 1 and the mobile phone 2 will be described.

  FIG. 7 is a flowchart showing a process from when the mobile phone 1 or the mobile phone 2 acquires the content file 132a from the external storage medium 3 to reproduce the content 52a. The case where the mobile phone 2 acquires the content 52a will be described as an example with reference to FIG. The mobile phone 2 acquires the content file 132a from the external storage medium 3 connected by the external interface units 105 and 131. The content 52a included in the acquired content file 132a is decrypted by the content protection unit 104 (S251). At this time, the telephone number of the mobile phone 2 is used for decrypting the content file 132a.

  Here, if the content 52a is not encrypted by the telephone number of the mobile phone 2, the content 52a cannot be decrypted (No in S252). If the content 52a cannot be decrypted, the reproduction processing of the content 52a shown in FIG. 7 ends. On the other hand, if the content 52a can be decrypted in step S252 (Yes in S252), whether or not the content 52a can be reproduced is determined in accordance with steps S253 to S260.

  First, the control unit 101 confirms whether the content ID of the decrypted content 52a is included in the checkout content ID list 102b of the mobile phone 2 (S253). If the content ID is not included in the checkout content ID list 102b of the mobile phone 2 (No in S254), the content 52a is not designated to be prohibited from being played on the mobile phone 2. Therefore, the content playback unit 103 of the mobile phone 2 plays back the decrypted content 52a (S261).

  On the other hand, when the content ID is included in the checkout content ID list 102b of the mobile phone 2 (Yes in S254), the status flag registered in the checkout content ID list 102b is confirmed (S255). There are three types of status flags: “check-out OK”, “check-in OK”, and “check-in NG”, but there is a possibility that the content 52a can be played back in the “check-in OK” state. Therefore, if the state is not “check-in OK” (No in S256), the process ends. When it is in the “check-in OK” state (Yes in S256), the check-in information included in the content file 132a is decrypted (S257). At this time, the key used for decryption is a key created using a telephone number registered in the checkout ID list. This telephone number corresponds to the check-out telephone number because it is a telephone number registered in the “check-in OK” state.

  After decrypting the check-in information, the check-in telephone number included in the check-in information is compared with the telephone number of the own terminal (S258). If the check-in telephone number does not match the telephone number of the terminal itself (No in S259), the process ends without reproducing the content 52a. On the other hand, if the check-in phone number matches the phone number of the terminal itself (Yes in S259), the content information is deleted from the check-out content ID list (S260), and the content is played back (S261).

  The processing procedure when the content file 132a is read from the external storage medium 3 and the content 52a is reproduced by the content reproduction unit 103 has been described above. Since the content file 132a stored in the external storage medium 3 is encrypted, when the content 52a is reproduced while being read from the external storage medium 3, it is decrypted and reproduced every time according to the flow shown in FIG.

  When storing the content 52 a in the storage unit 102 of the mobile phone 2, the content file 132 a may be decrypted and the content 52 a may be stored in the storage unit 102. In this case, the processing step (S261) of reproducing the decrypted content 52a in FIG. 7 is replaced with a processing step of saving the decrypted content 52a in the storage unit 102. By performing the processing in this way, the content 52a stored in the storage unit 102 is in an unencrypted state, and can be reproduced by the content reproduction unit 103 without being decrypted each time.

  FIG. 8 to FIG. 10 show movement patterns when moving contents by backup copy or telephone number binding conversion of the mobile phone content file 132a.

The external storage media 3a and 3b shown in FIGS. 8 to 10 have the same configuration as the external storage medium 3 of FIG. A process performed based on the flowchart of FIG. 7 when the content file 132a is moved to the mobile phones 1 and 2 as shown in FIGS.

  FIG. 8 shows a case where the content file 132a including the content 52a is backed up and copied from the mobile phone 1 to the external storage medium 3a (E301), and the content file 132a is restored to the mobile phone 1 (E302). Since the content 52a included in the content file 132a restored to the mobile phone 1 is encrypted using the phone number of the mobile phone 1, it can be decrypted (Yes in S252 of FIG. 7).

Further, since the content 52a is not subjected to the telephone number bind conversion, the content ID of the content 52a is not registered in the checkout content ID list (No in S254 in FIG. 7). Therefore, the content 52a is stored as content that can be played back by the mobile phone 1 (S261 in FIG. 7).

  In FIG. 9, the mobile phone 1 stores the content file 132a including the content 52a obtained by telephone number binding conversion into the phone number of the mobile phone 2 in the external storage medium 3a (E311), and the mobile phone 2 acquires it (E312). In this case, the telephone number is converted again into the telephone number of the mobile phone 1 and stored in the external storage medium 3a (E313), and the mobile phone 1 acquires it (E314).

  When the mobile phone 2 acquires the content file 132a including the content 52a subjected to the telephone number binding conversion from the external storage medium 3a (E312), the content 52a performs the telephone number binding conversion using the telephone number of the mobile phone 2 as the check-in telephone number. Therefore, it can be decrypted (Yes in S252 in FIG. 7). Further, the content ID of the content 52a is registered in the checkout content ID list of the mobile phone 2 (Yes in S254 in FIG. 7), and the status flag is “check-in OK” (in S256 in FIG. 7). Yes). Therefore, the check-in telephone number is decrypted using the check-out telephone number registered in the check-out content ID list (S257 in FIG. 7), and it is confirmed that the check-in telephone number matches the telephone number of the terminal itself. (Yes in S259 in FIG. 7). Then, the information of the content 52a is deleted from the checkout content ID list (S260 in FIG. 7), and the content 52a is stored as a content that can be played back by the mobile phone 2 (S261 in FIG. 7).

  Similarly, when the content file 132a including the content 52a acquired by the mobile phone 2 is again subjected to phone number bind conversion using the phone number of the mobile phone 1 and stored in the mobile phone 1 (E314), the mobile phone Since the telephone number bind conversion is performed with 1 as the checkout destination, the content 52 a is stored as a content that can be played back by the mobile phone 1.

  In FIG. 10, the mobile phone 1 makes a backup copy of the content file 132a containing the content 52a to the external storage medium 3a (E321), and then the mobile phone 1 calls the content file 132a containing the content 52a to the telephone number of the mobile phone 2. Number binding conversion is performed to store in the external storage medium 3b (E322), and the mobile phone 2 acquires and stores it (E323), and then the content file 132a that has been backed up and copied to the external storage medium 3a is stored in the mobile phone 1 (E324) is shown.

  When the content file 132a stored in the external storage medium 3a is restored to the mobile phone 1 (E324), the content 52a included in the content file 132a restored from the external storage medium 3a is decrypted with the telephone number of the mobile phone 1 (Yes in S252 in FIG. 7). Further, since the mobile phone 1 performs telephone number bind conversion of the content 52a to the phone number of the mobile phone 2 at E322, the content ID of the content 52a is registered in the checkout content ID list of the mobile phone 1 (see FIG. 7 S254 Yes). However, the status flag of the checkout content ID list is “check in NG” (No in S256 of FIG. 7). This is because the state of the check-out content ID list of the mobile phone 1 is set to “check-in NG” when the content 52a is converted from the mobile phone 1 to the mobile phone 2 by telephone number binding (S210 in FIG. 4). . Therefore, the content 52a is not stored as content that can be played back by the mobile phone 1.

  In the embodiment as described above, the content file 132a including the content 52a can be moved by the external storage device 3 only by one mobile phone, so that the content can be protected.

  In the first embodiment, when the telephone number binding conversion is performed, the case where the telephone number binding conversion can be performed regardless of the contractor of the destination mobile phone has been described. In the second embodiment, a case will be described in which contractors of the mobile phone of the movement source and the mobile phone of the movement destination are checked, and whether or not content movement is possible is determined according to the contractor of the mobile phone of the movement destination.

Next, a second embodiment of the present invention will be described with reference to FIGS.
(System configuration)
FIG. 11 is a diagram showing the configuration of the content movement system of this embodiment. The content movement system according to this embodiment includes a mobile phone 1, a mobile phone 2, an external storage medium 3, a data communication network 4, a content server 5, and a customer data management device 500. The components other than the customer data management device 500 in the configuration diagram of the content migration system shown in FIG. 11 are the same as those in FIG.

  The customer data management device 500 is a server device that manages data related to customers who are subscribed to a mobile communication system with which the mobile phone 1 communicates and data related to the mobile phone 1 related to the contract of the customer. The customer data management apparatus 500 includes a control unit 501 that performs overall control. The control unit 501 is connected to a storage unit 502, a customer data search unit 503, and a communication unit 504 via an internal bus. The storage unit 502 stores customer data 502a. In the customer data 502a, a telephone number to which the content 52a can be moved is registered. The customer data 502a is updated when the user makes a contract for a new telephone number or when the user cancels the telephone number. The structure of the data registered in the customer data 502a as the destination of the content 52a differs depending on what mobile phone is recognized as the destination when the content 52a is moved. 12A to 12C are examples of registration data of the customer data 502a.

  For example, FIG. 12A shows the telephone number of the mobile phone 2 to which the content 52a is moved as when the mobile phone 1 used before is canceled and the new mobile phone 2 is contracted and used. The data structure of the customer data 502a in the case where is limited to one is shown. In the data structure of (a), an old telephone number and a new telephone number are registered for each user name holder. In FIG. 12, the name of the user name holder is registered, but it may be omitted. Information other than the name of the user name holder and the old telephone number and the new telephone number may be included.

  The data structure of FIG. 12B is an example of registration of customer data when a plurality of telephone numbers are registered for the same user holder. In (b), one user name holder obtains telephone numbers 1 to n. This data structure can be used, for example, when one user acquires a plurality of telephone numbers 1 to n and wants to move the content 52a to any one of the mobile telephones having the telephone numbers 1 to n.

  The data structure in FIG. 12C is an example of customer data registration when a plurality of telephone numbers are registered for each of a plurality of user holders. In (c), each user holder may obtain a plurality of telephone numbers 1 to n. If the data structure of FIG.12 (c) is used, even if a user holder differs, the content 52a can be moved to the mobile phone from which a telephone number differs. However, instead of moving the content 52a to the mobile phone having any telephone number, the user name holder of the mobile phone to be moved can be restricted. For example, it can be registered in the customer data 502a and can be moved only when the name of the destination mobile phone is a family member. It is also possible to limit the number of mobile phones at the destination.

  Returning to the description of FIG. The customer data search unit 503 searches for information registered from the customer data 502 a in the storage unit 502. It is also possible to receive two telephone numbers and search whether it is possible to move the content 52a from one telephone number to the other telephone number.

  The communication unit 504 is used for transmitting and receiving data via the data communication network 4. For example, when the communication unit 504 receives the telephone number of the mobile phone 1 or 2, the control unit 501 searches the customer data 502 a by the customer data search unit 503. When the registration information corresponding to the telephone number is acquired by the search, the registration information can be transmitted to the mobile phone 1 or 2 by the communication unit 504.

  In the mobile communication system having the above-described configuration, the operation when the mobile phone 1 downloads content from the content server 5 is performed in the same procedure as the content download described in the first embodiment, and thus the description thereof is omitted. . Also, the process for backup copy of the content is the same as that in the first embodiment, and thus the description thereof is omitted.

(Contents phone number binding conversion)
Next, the phone number bind conversion is performed on the content 52 a stored in the storage unit 52 of the mobile phone 1 by downloading from the content server 5, and the content is transferred to the external storage device 3. A case of moving to the telephone 2 will be described. When the telephone number bind conversion is executed, the telephone number of the mobile phone 1 that is the movement source is the check-out telephone number, and the telephone number of the mobile telephone 2 that is the movement destination is the check-in telephone number.

  FIG. 13 is a sequence diagram showing processing when the content file 132a is converted to the telephone number binding. In FIG. 13, the same steps as those in FIG. 4 are denoted by the same reference numerals.

  Steps S201 to S206 in FIG. 13 are processes in the previous stage for executing the telephone number bind conversion. First, this process will be described. The cellular phone 1 extracts the content ID of the content to be subjected to telephone number bind conversion in accordance with a command from the input unit 59 (S201). Here, the content ID to be extracted may be singular or plural. Then, the extracted content ID is registered in the checkout content ID list 52b of the mobile phone 1 (S202). At this time, the state flag is set to a “check-in NG” state, and nothing is registered in the telephone number item.

  Then, the control unit 51 transmits an authentication request to the customer data management device 500 via the communication unit 56 (S551). At this time, the control unit 51 transmits the check-out telephone number (that is, the telephone number of the mobile phone 1) to the customer data management apparatus 500 together with the authentication request.

  Upon receiving these signals by the communication unit 504, the customer data search unit 503 of the customer data management apparatus 500 obtains the phone number of the mobile phone that may move the content file 132a from the mobile phone 1 having the check-out phone number. A search is made from the database of data 502a (S552), and a telephone number that can be converted into a telephone number bind is transmitted as an authentication response (S553). At this time, if the customer data 502a has a data format as shown in FIG. 12A, the telephone number transmitted as the authentication response is a telephone number registered as the new telephone number of the same holder. If the data format is as shown in FIG. 12B, the telephone number transmitted as the authentication response is the telephone number of the same user holder transmitted to the mobile phone 1.

If the data format is as shown in FIG. 12C, the telephone number transmitted as the authentication response is the telephone number of a predetermined holder. If the customer data search unit 503 determines that there is no telephone number to which the content file 132a can be moved, the customer data search unit 503 transmits a signal indicating that the content file 132a cannot be moved to the mobile phone 1.

  Then, the cellular phone 1 that has received the phone number that can be converted to the phone number bind transmits a request for registering the check-out content ID list to the cellular phone 2 (S554). At the time of transmitting the registration request, the check-out telephone number, the ID of the content to be bound-converted, and the telephone number received from the customer data management apparatus 500 that can be bound and bound-converted are transmitted.

In addition, when there are a plurality of telephone numbers that can be phone number-bound converted received from the customer data management device 500, a plurality of telephone numbers may be transmitted to the mobile phone 2, or the input unit 59 of the mobile phone 1 You may receive selection of the telephone number transmitted from a user. The mobile phone 2 that has received the registration request compares the phone number that can be phone number-bound converted with the phone number of the terminal itself (S555). If these telephone numbers match, the mobile phone 2 registers the content ID received from the mobile phone 1 in the checkout content ID list 102b.

The status flag at this time is set to “check-in OK”, and the received check-out telephone number is registered in the telephone number field (S556). Then, an authentication result indicating that the telephone number that can be converted to the telephone number bind matches the telephone number of the mobile phone 2 is transmitted to the mobile phone 1 (S557).

  The mobile phone 1 that has received the authentication result updates the checkout content ID list 52b. At this time, the status flag is set to “checkout OK”, and the telephone number that can be converted from the telephone number bind received from the customer data management apparatus 500 in step S553 is registered in the telephone number field (S206). When the communication in steps S551, S553, S554, and S557 is disconnected, the update of the checkout content ID list in step S206 cannot be completed. For this reason, the content file 132a is stored in the check-out content ID list of the mobile phone 1 as a “check-in NG” state and cannot be played back by the mobile phone 1. Therefore, when the process of step S206 is not completed, the registration of the checkout content ID list is deleted.

  Through the above processing, the phone number bind conversion from the mobile phone 1 to the mobile phone 2 is possible. The telephone number bind conversion process (S207 to S211) is the same as the telephone number bind conversion process described in the first embodiment, and a description thereof will be omitted.

  In the process shown in FIG. 13, the check-out telephone number is transmitted from the mobile phone 1 to the customer data management apparatus 500, and the customer data management apparatus 500 searches for a telephone number that can be converted to a telephone number. The telephone numbers of the mobile phone 1 and the mobile phone 2 may be transmitted to the device 500, and the customer data management device 500 may authenticate whether or not the content file 132a can be moved from the mobile phone 1 to the mobile phone 2. The processing at this time is shown in FIG. In FIG. 14, steps common to those in FIG. 13 are denoted by the same numbers.

  The mobile phone 1 extracts the content ID of the content to be subjected to telephone number bind conversion in accordance with a command from the input unit 59 (S201), and registers the extracted content ID in the checkout content ID list 52b of the mobile phone 1 ( S202). At this time, the state flag is set to a “check-in NG” state, and nothing is registered in the telephone number item. Then, the mobile phone 1 makes an authentication request to the customer data management device 500. At this time, the check-in telephone number and the check-out telephone number are transmitted to the customer data management device 500 (S571). Note that the method of acquiring the check-in telephone number by the mobile phone 1 may be, for example, a method from the mobile phone 2 through communication between the infrared communication unit 60 and the infrared communication unit 110, or a user input using the input unit 59. The method is also acceptable.

  The customer data management apparatus 500 that has received the authentication request from the mobile phone 1 by the communication unit 504 includes whether or not the customer data search unit 503 includes the check-in telephone number corresponding to the check-out telephone number in the customer data 502a. It is confirmed whether there is any (S572). If it is included, an authentication result indicating that telephone number binding conversion is possible is transmitted to the mobile phone 1. If not included, an authentication result indicating that telephone number binding conversion is impossible is transmitted to the mobile phone 1 (S 573).

  When the mobile phone 1 receives the authentication result indicating that the telephone number bind conversion is possible by the communication unit 56, the mobile phone 1 transmits a checkout content ID list registration request to the mobile phone 2 (S574). When the registration request is transmitted, the checkout telephone number and the ID of the content to be bind-converted are transmitted.

  The mobile phone 2 receives the content ID and the check-out telephone number transmitted from the mobile phone 1, and registers this content ID in the check-out content ID list 102b. The status flag at this time is set to “check-in OK”, and the received check-out telephone number is registered in the telephone number field (S575). When the registration to the checkout content ID list 102b is completed, a signal indicating that the registration is completed is transmitted to the mobile phone 1 (S576). The mobile phone 1 receives this and updates the information in the checkout content ID list 52b. The status flag at this time is set to “checkout OK”, and the check-in telephone number is registered in the telephone number field (S206).

  With the above processing, the phone number bind conversion from the mobile phone 1 to the mobile phone 2 is enabled, and the phone number bind conversion is performed in steps S207 to S211.

  When the content 52a included in the content file 132a stored in the external storage medium 3 by the process of FIG. 13 or FIG. 14 is played back on the mobile phone 2, the content file 132a is decrypted using the method shown in FIG. 52a is acquired and stored in the playback or storage unit 102.

  In the first embodiment and the second embodiment, the embodiment in which the content is moved via the external storage medium 3 is shown. Since the external storage medium 3 can be realized by a simple portable device, the content can be easily moved. However, it is necessary to determine a mobile phone from which content is acquired by the time when the content is stored in the external storage medium 3.

  The third embodiment is an embodiment in which content is stored in an information processing apparatus (for example, a PC) that can perform content encryption processing, and the content is moved therefrom. Note that although the information terminal is described here as a mobile phone and the information processing apparatus is a PC, the present invention is not limited to this. Also, the content encryption method is the telephone number binding as in the first and second embodiments. If the third embodiment is used, since the information processing apparatus performs content encryption processing, it is not necessary to determine a destination mobile phone by the time when the content is stored in the information processing apparatus.

(System configuration)
FIG. 15 is a diagram illustrating a system configuration of the content movement system according to the present embodiment. The content moving system includes a mobile phone 1, a mobile phone 2, a data communication network 4, a content server 5, a customer data management device 500, and a PC 600. Since the components other than the PC 600 are the same as those in FIG.

  The PC 600 includes a control unit 601 that controls the entire PC 600. A storage unit 602, a content protection unit 603, an external interface unit 604, a communication unit 605, an audio input / output unit 606, a display unit 607, and an input unit 608 are connected to the control unit 601 through an internal bus.

  The storage unit 602 stores settings of the PC 600, application programs, and the like. Further, the storage unit 602 can make a backup copy of the content 52a from the mobile phone 1 or 2 connected by the external interface unit 604 or the communication unit 605. The content protection unit 603 encrypts and decrypts the content 52a. The external interface unit 604 is used for connection with an external device. The PC 600 can be connected to the mobile phone 1 or the mobile phone 2 also by the external interface unit 604. The communication unit 605 is connected to the data communication network 4 and transmits / receives information to / from other devices on the data communication network 4. The connection to the data communication network 4 may be a wired connection or may be a wireless connection when the communication unit 605 includes an antenna. The voice input / output unit 606 is configured by a sound card or the like, and is connected to a microphone and a speaker. The display unit 607 includes a display and displays characters and images. The input unit 608 includes a mouse and a keyboard, and receives an input operation from the user.

  In the content moving system having the above-described configuration, a process for backing up and copying the content 52a to the PC 600 and a process for performing telephone number bind conversion on the content 52a backed up and copied to the PC 600 will be described.

(Information registration to PC)
Before performing backup copy or telephone number bind conversion, predetermined information including at least the telephone number of the mobile phone that is connected to the PC 600 and exchanges the content 52a is registered in the storage unit 602 of the PC 600 in advance. The content protection unit 603 of the PC 600 performs telephone number bind conversion of the content 52a using the telephone number included in the information registered in the storage unit 602.

  However, if the mobile phone that can be registered as a check-in destination in the storage unit 602 of the PC 600 is allowed without limitation, the content 52a cannot be sufficiently protected. Therefore, the mobile phone that can be registered in the storage unit 602 of the PC 600 is limited to only the mobile phone of the same user as the mobile phone 1 that stores the content 52a in the PC 600, or the user who cancels the mobile phone 1 makes a contract instead. The restriction is added by adding a condition such as limiting to only the mobile phone 2 that has been used.

  In this embodiment, the customer data management device 500 is used to determine whether or not these conditions are met. In the customer data 502a of the customer data management device 500, contract information and the like of the mobile phone 1 are registered. Therefore, it is configured so that which user is contracted with which mobile phone and which telephone number can be identified by using the contract information of the customer data 502a. Here, it is assumed that only the mobile phone of the same user as mobile phone 1 can register content in PC 600.

(Backup copy of content to PC)
In the content transfer system having such a configuration, when the content 52a from the mobile phone 1 is backed up and copied to the storage unit 602 of the PC 600, information on the mobile phone 1 is registered in the PC 600 in advance, and the content 52a is stored in the mobile phone 1 And stored in the storage unit 602. Since the processing procedure when performing backup copy is the same as that of the first embodiment, description thereof is omitted.

(Binding conversion of content)
When the mobile phone having the same phone number as the mobile phone 1 acquires the content 52a that has been backed up and copied in the storage unit 602, the content 52a can be decrypted with the phone number. However, when a mobile phone having a phone number different from that of the mobile phone 1 is acquired, it is necessary to perform phone number bind conversion. If the mobile phone 1 itself also changes the phone number, it is necessary to perform the phone number bind conversion. However, hereinafter, the mobile phone 2 having a phone number different from the mobile phone 1 acquires the content 52a as an example. Processing when performing number binding conversion will be described.

  FIG. 16 is a sequence diagram showing an operation when the content 52a backed up and copied in the storage unit 602 is converted into a telephone number binding conversion to the telephone number of the mobile phone 2.

  First, a process for checking out the content 52a backed up and copied to the PC 600 from the mobile phone 1 will be described. The PC 600 extracts the content ID of the content to be subjected to telephone number bind conversion in response to a command from the input unit 608 (S701). Here, the content ID to be extracted may be singular or plural. The extracted content ID is transmitted to the mobile phone 1 (S702). Receiving this, the mobile phone 1 registers the extracted content ID in the checkout content ID list 52b of the mobile phone 1 (S703). At this time, the state flag is set to a “check-in NG” state, and nothing is registered in the telephone number item. When the mobile phone 1 completes registration, a signal indicating that registration is complete is transmitted to the PC 600 (S704). A list for content management as shown in FIG. 17 is stored in the storage unit 602 of the PC 600, and when the PC 600 receives a registration completion signal in step S704, the content is in a state in which the telephone number bind conversion is possible. And the check-out telephone number for telephone number binding conversion are registered in the list (S705).

  Through the above processing, the check-out of the content 52a from the mobile phone 1 is completed, and the content 52a is ready for telephone number binding conversion. Also, by this processing (S701 to S705), the selected content 52a is in a “check-in NG” state and cannot be played back on the mobile phone 1.

  Next, the processing (S706 to S711) for converting the content 52a in a state in which the telephone number bind conversion is possible will be described. First, in order to perform the telephone number bind conversion, the mobile phone 2 is connected to the PC 600, and it is authenticated whether the content 52a can be converted into the telephone number of the mobile phone 2 (S706).

  The authentication process in step S706 will be described with reference to FIG. First, the PC 600 checks whether the connected mobile phone 2 is already registered in the PC 600 (S706a). The fact that it is registered in the PC 600 indicates that telephone number binding conversion is possible. If it has not been registered (No in S706a), the mobile phone 2 is registered in the PC 600 by the processes in steps S706b to S706g. First, the PC 600 is connected to the customer data management apparatus 500 via the data communication network 4 and transmits an information acquisition request for a mobile phone capable of converting the content 52a to a telephone number (S706b).

At this time, information of the cellular phone 1 that has instructed the backup copy of the content 52a from the PC 600 is also transmitted. The information of the mobile phone 1 may be a telephone number or other information indicating the mobile phone 1. The customer data search unit 503 of the customer data management device 500 searches the customer data 502a based on the information of the mobile phone 1, and transmits “information of the mobile phone of the same user as the mobile phone 1” to the PC 600 via the data communication network 4. To do.

  The control unit 601 of the PC 600 receives “information on the mobile phone of the same user as the mobile phone 1” from the customer data management device 500 via the communication unit 605 (S706c). Then, the information and the authentication request are transmitted together to the mobile phone 2 connected to the PC 600 (S706d). The control unit 101 of the mobile phone 2 compares “information on the mobile phone of the same user as the mobile phone 1” with the information of the mobile phone 2 itself, and authenticates whether the information is the same user. When the authentication is successful, the control unit 101 of the mobile phone 2 transmits information including the telephone number of the mobile phone 2 to the PC 600 as an authentication response via the data communication network 4.

  The control unit 601 of the PC 600 acquires the authentication response from the mobile phone 2 (S706e), and if the authentication information can be received and registered without error (Yes in S706f), the information of the mobile phone 2 is stored in the storage unit of the PC 600. It registers in 602 (S706g). As a result, the content 52a can be converted into a telephone number binding to the telephone number of the mobile phone 2.

  Returning to the description of FIG. After receiving the authentication that the telephone number bind conversion is possible to the telephone number of the mobile phone 2, the PC 600 receives the selection of the content to be subjected to the telephone number bind conversion from the contents that can be converted to the telephone number bind by the input unit 608. (S707). Then, the check-out telephone number is read from the content management list stored in the storage unit 602 and transmitted to the mobile phone 2 together with the content ID of the selected content (S708). The mobile phone 2 registers the received content ID in the checkout content ID list (S709). At this time, the state flag is set to “check-in OK”, and the check-out telephone number is registered in the telephone number item. Then, information indicating that the registration is completed and the check-in telephone number are transmitted to the PC 600 (S710), and the PC 600 performs telephone number bind conversion using the check-in telephone number and the check-out telephone number (S711). The telephone number bind conversion in step S711 is performed by the content protection unit 603 decrypting the content 52a with the telephone number of the mobile phone 1 and re-encrypting with the telephone number of the mobile phone 2. By the processing up to step S711, the content subjected to the telephone number binding conversion can be restored to the mobile phone 2 at any time.

  Through the processing as described above, the content 52a stored in the PC 600 can be moved to the mobile phone 2. In FIG. 18, when registering the mobile phone 2, the mobile phone 2 authenticates whether the mobile phone 2 can be registered in the PC 600, but the authentication is not limited to the mobile phone 2. For example, when the PC 600 is connected to the mobile phone 2, the mobile phone 2 information may be acquired, and the PC 600 may determine whether the mobile phone information that can be subjected to the phone number binding conversion matches the mobile phone 2 information. . Alternatively, the information of the mobile phone 1 and the mobile phone 2 is transmitted from the PC 600 to the customer data management device 500, and the customer data management device 500 determines whether the content 52a can be moved from the mobile phone 1 to the mobile phone 2. Alternatively, an authentication method of transmitting the determination result to the PC 600 may be used.

  By adopting the configuration of the embodiment as described above, it is possible to encrypt the content so that it can be decrypted only by the phone number of the mobile phone to be backed up, and when restoring the backed up copy content, Even if the number is changed, the telephone number binding conversion to the new telephone number becomes possible.

  In addition, it is not limited to the said Example, You may change suitably in the range which does not deviate from the summary of this invention. Further, the embodiments may be realized by appropriately combining them as necessary.

The block diagram which shows the structure of the system which concerns on 1st Example of this invention. 6 is a flowchart showing a processing procedure when the mobile phone 1 of the content movement source shown in FIG. 1 makes a backup copy of the content to an external storage medium. The example of the checkout content ID list | wrist of the mobile telephone 1 and the mobile telephone 2 shown in FIG. FIG. 3 is a sequence diagram showing a processing procedure when the mobile phone 1 of the content movement source shown in FIG. 3 is an example of a user interface for confirming execution of telephone number binding conversion displayed on the display screen of the mobile phone 1 shown in FIG. 1. The figure which shows the content of a content file. 6 is a flowchart showing processing when the mobile phone 2 shown in FIG. 1 acquires content from an external storage medium and plays back or saves the content. An example of content movement in the system shown in FIG. An example of content movement in the system shown in FIG. An example of content movement in the system shown in FIG. The block diagram which shows the structure of the system which concerns on Example 2 of this invention. The example of the customer data memorize | stored in the customer data management apparatus shown in FIG. 12 is a flowchart showing processing when the mobile phone 1 shown in FIG. 12 is a flowchart showing processing when the mobile phone 1 shown in FIG. The block diagram which shows the structure of the system which concerns on Example 3 of this invention. FIG. 16 is a flowchart showing processing when the PC shown in FIG. 15 converts content to a telephone number of the mobile phone 2 by telephone number binding. 16 is an example of a content management list stored in the PC illustrated in FIG. The flowchart showing the authentication process of FIG.

Explanation of symbols

1 mobile phone, 2 mobile phone, 3 external storage medium, 4 data communication network, 5 content server, 51 control unit, 52 storage unit, 52a content, 52b checkout content ID list, 53 content playback unit, 54 content protection unit, 55 External interface unit, 56 communication unit, 57 signal processing unit, 58 display unit, 59 input unit, 60 infrared communication unit, 101 control unit, 102 storage unit, 102b checkout content ID list, 103 content playback unit, 104 content protection Unit, 105 external interface unit, 106 communication unit, 107 signal processing unit, 108 display unit, 109 input unit, 110 infrared communication unit, 131 external interface unit, 132 storage unit, 132a content file, 231a check Quinn Information, 500 Customer Data Management Device, 501 Control Unit, 502 Storage Unit, 502a Customer Data, 503 Customer Data Search Unit, 504 Communication Unit, 600 PC, 601 Control Unit, 602 Storage Unit, 603 Content Protection Unit, 604 External Interface Unit, 605 communication unit, 606 voice input / output unit, 607 display unit, 608 input unit

Claims (6)

A storage means for storing a content, content identification information for identifying the content, a content identification information list for managing a use restriction state of the content, an external connection means for connecting an external storage device, and another information terminal From a first information terminal and a second information terminal having communication means for communication, management device connection means for communicating with a management device for managing identification information of an information terminal capable of moving content, and control means for controlling the terminal itself A content transfer system comprising:
The first information terminal transmits identification information assigned to the first information terminal to the management device by the management device connection means, and identification information of an information terminal capable of moving content from the management device And transmitting the content identification information and the identification information of the content movable information terminal to the second information terminal by the communication means,
The second information terminal compares the identification information of the content movable information terminal acquired by the communication means with the second identification information assigned to the second information terminal, and if they match, the communication The content identification information received by the means is associated with information indicating that the content can be reproduced and registered in the content identification information list of the storage means, and the second identification information is registered by the communication means by the first means. To your information terminal,
The first information terminal encrypts the content with a key created using at least the second identification information received by the communication means, and indicates that the content cannot be reproduced. Registering it in the content identification information list of the storage means in association with information, storing the encrypted content in the second information terminal connected by the communication means or the external storage device connected by the external connection means,
When the second information terminal acquires the encrypted content, the second information terminal decrypts the content with a key created using at least the second identification information, and the content identification information of the decrypted content is A content transfer system, wherein the decrypted content is stored or reproduced in the storage means if it is not registered in the content identification information list of the second information terminal in an unreproducible state. An information terminal that is communicable with a management device that manages identification information of an information terminal capable of moving content, and that receives the movement of the content of the first information terminal from a first information terminal,
  Content identification information that can identify content, and information that can be acquired from the management device by transmitting the first identification information assigned to the first information terminal from the first information terminal to the management device. Receiving means for receiving identification information of a content movable information terminal from the first information terminal;
  Associating the content identification information with information indicating that the content is reproducible when the identification information of the information terminal capable of moving the content matches the second identification information assigned to the information terminal Registration means for registering in the content identification information list,
  Transmitting means for transmitting the second identification information to the first information terminal when the identification information of the information terminal capable of moving content matches the second identification information assigned to the information terminal;
  Decrypting means for decrypting the content with a key created using at least the second identification information when content encrypted with the key created using at least the second identification information is acquired; Prepared,
  If the content identification information of the decrypted content is associated with information indicating that the content cannot be reproduced and is not registered in the content identification information list, the decrypted content is stored or reproduced. Information terminal. An information terminal that is communicable with a management device that manages identification information of an information terminal capable of moving content, and that receives the movement of the content of the first information terminal from a first information terminal,
  Content identification information that can identify content, and information that can be acquired from the management device by transmitting the first identification information assigned to the first information terminal from the first information terminal to the management device. Receiving means for receiving identification information of a content movable information terminal from the first information terminal;
  Associating the content identification information with information indicating that the content is reproducible when the identification information of the information terminal capable of moving the content matches the second identification information assigned to the information terminal Registration means for registering in the content identification information list,
  Decrypting means for decrypting at least the content encrypted with the key created using the second identification information, using the key created using at least the second identification information;
  If the content identification information of the decrypted content is associated with information indicating that the content cannot be reproduced and is not registered in the content identification information list, the decrypted content is stored or reproduced. Information terminal. An information terminal that is communicable with a management device that manages identification information of an information terminal capable of moving content, and that receives the movement of the content of the first information terminal from a first information terminal,
  Content identification information that can identify content, and information that can be acquired from the management device by transmitting the first identification information assigned to the first information terminal from the first information terminal to the management device. Receiving means for receiving identification information of a content movable information terminal from the first information terminal;
  Decrypting means for decrypting at least the content encrypted with the key created using the second identification information, using the key created using at least the second identification information;
  An information terminal that stores or reproduces the decrypted content when the identification information of the information terminal capable of moving the content matches the second identification information assigned to the information terminal. An information terminal that can communicate with a management device that manages identification information of an information terminal capable of moving content, and that moves content to a second information terminal,
  Storage means for storing content encrypted with a key created using at least first identification information assigned to the information terminal;
  Management device connection means for transmitting the first identification information to the management device and receiving from the management device identification information of an information terminal capable of moving content according to the first identification information;
  Transmitting means for transmitting content identification information capable of identifying the content and identification information of the information terminal capable of moving the content to the second information terminal;
  Receiving means for receiving the second identification information when the identification information of the information terminal capable of moving content matches the second identification information assigned to the second information terminal;
  Encryption means for encrypting content with a key created using at least the second identification information,
  The information terminal characterized in that the transmitting means transmits to the first information terminal content encrypted with a key created using at least the second identification information. An information terminal that can communicate with a management device that manages identification information of an information terminal capable of moving content, and that moves content to a second information terminal,
  Storage means for storing content encrypted with a key created using at least first identification information assigned to the information terminal;
  Management device connection means for transmitting the first identification information to the management device and receiving from the management device identification information of an information terminal capable of moving content according to the first identification information;
  Transmission means for transmitting content identification information capable of identifying content and identification information of the information terminal capable of moving the content to the second information terminal;
  When the identification information of the information terminal capable of moving content matches the second identification information assigned to the second information terminal, the transmission means is created using at least the second identification information. Transmitting the content encrypted by the key to the first information terminal.

Images