JP5552796B2 - Mobile terminal device and content control method - Google Patents

Description

  The present invention relates to a mobile terminal device that reproduces content stored in a storage unit and a content control method.

  In recent mobile phones, there are an increasing number of mobile phones that can reproduce music and video content stored in a memory (storage unit). Among the contents that can be played back by a mobile terminal device such as a mobile phone, some content is restricted so that the content can be played back only by the mobile terminal device of the user who obtained the content from the viewpoint of copyright protection. is there. An example of this restriction technique is digital rights management (DRM).

  This DRM encrypts the content using information of a USIM (Universal Subscriber Identity Module) incorporated in the mobile terminal device of the user who obtained the content as a key, and the USIM is incorporated (attached). Reproduction of content other than mobile terminal devices is restricted. For example, even if the same mobile terminal device is used, if a USIM different from the USIM used for encryption is attached, content playback is restricted (see Patent Document 1). In addition, in these technologies, restrictions are set on the expiration date and the number of times that playback can be performed on the content, and if the expiration date has passed and the number of playback times has been exceeded, the content cannot be played back. There is also a function to do.

JP 2007-181108 A JP 2007-252000 A JP 2009-049484 A

  By the way, in a state where a USIM different from the USIM used for encryption is attached, the reproduction of the content is restricted, but the content can be deleted from the memory. For example, a function that automatically deletes content when a different USIM is attached has been proposed (see Patent Document 2).

  For this reason, content may be deleted, unlike the consciousness of a user who has the right to reproduce and view the content. For example, a case where a user 1 downloads content with a limited number of playbacks and can view it on a mobile phone equipped with USIM 1 is taken as an example. In this case, the content is encrypted using the information of USIM1 as a key, and can be reproduced up to the set number of reproducible times only with the mobile phone equipped with USIM1.

  When the user 1 removes the USIM 1 and the user 2 wears the USIM 2 and uses the mobile phone in which such content is stored, the content may be deleted by mistake. If the content is deleted in this way, even if the user 1 wears the USIM 1, the mobile phone cannot reproduce the content that can still be reproduced.

  Here, a technique for restricting deletion within a content reproduction expiration date has been proposed (see Patent Document 3). However, even with this technique, deletion cannot be restricted for content that has a limit on the number of times it can be played.

  The present invention has been made in order to solve the above-described problems, and enables content that has a limit on the number of times it can be played to be protected from being deleted by a user without usage rights. With the goal.

The mobile terminal device according to the present invention is a mobile terminal device that can be connected to a network. A user information storage medium in which user information is stored and detachable from the mobile device, and content can be reproduced. The storage means stored together with the reproduction restriction information indicating the number of times and the reproduction-permitted user information indicating the information of the user permitted to reproduce the content, the reproduction means for reproducing the content, and the number of times the content is reproduced by the reproduction means Reproduction number counting means for counting the number of reproductions, reproduction number confirmation means for detecting that the number of reproductions counted by the reproduction number counting means is less than or equal to the reproduction possible number of the reproduction restriction information, and use stored in the user information storage medium User information confirmation means for detecting a discrepancy between the user information and the reproduction-permitted user information, and the reproduction number confirmation means can reproduce the reproduction restriction information. It is detected at times less, while the mismatch between the user information and the reproduction authorized user information by the user information confirmation means has been detected, at least a deletion limiting means for disabling the content removal The content is stored in the storage unit together with the expiration date information in addition to the reproduction limitation information and the reproduction permitted user information, and includes an expiration date confirmation unit that compares the current date and the expiration date information. The deletion limitation unit confirms the number of times of reproduction. Means for detecting that the number of reproductions is less than or equal to the number of times that the reproduction restriction information can be reproduced, the user information confirmation means for detecting a mismatch between the user information and the reproduction permitted user information, and the expiration date confirmation means for determining the current date and time. While it is confirmed that it is within the expiration date, the content cannot be deleted, and the user information confirmation means uses the usage information stored in the user information storage medium. Detects a match between the information and the reproduction authorized user information, reproducing means, play the content by the detection of a match with the user information by the user information confirmation means, the reproduction authorized user information.

A content control method according to the present invention is a content control method for a mobile terminal device connectable to a network. A user information storage medium in which user information is stored and detachable from its own device; A storage step of storing together with reproduction restriction information indicating the number of times that the content can be reproduced and reproduction-permitted user information indicating information of a user who is permitted to reproduce the content; and a number of reproductions for counting the number of times the content has been reproduced A count step, a playback count confirmation step for detecting that the playback count counted in the playback count count step is less than or equal to the playback possible count of the playback limit information, and a user information storage medium attached to the own device. A user information confirmation step for detecting a mismatch between the user information and the reproduction-permitted user information, and the number-of-plays confirmation step While it is detected that the number of times of reproduction is less than or equal to the number of times that the reproduction restriction information can be reproduced, and inconsistency between the user information and the reproduction-permitted user information is detected in the user information confirmation step, At least a deletion restriction step for disabling the deletion of the content, and the content is stored together with the expiration date information in addition to the reproduction limitation information and the reproduction permitted user information, and the expiration date is confirmed by comparing the current date and the expiration date information. And the deletion restriction step detects that the number of reproductions is less than or equal to the number of reproductions permitted by the reproduction restriction information, detects a mismatch between the user information and the reproduction-permitted user information, and determines the current date and time in the expiration date confirmation step. Is confirmed to be within the expiration date, the content cannot be deleted, and the user information storage step stores the user information. Detects a match with the user information stored in the body and play authorized user information, a match with the user information in the user information confirmation step and the reproduction authorized user information is detected content is playable The

  As described above, according to the present invention, when the number of reproductions is less than or equal to the number of reproductions possible for the reproduction restriction information and the user information and the reproduction-permitted user information do not match, it is impossible to delete the content. As a result, it is possible to obtain an excellent effect that it becomes possible to protect content that has a limited number of reproducible times from being deleted by a user without usage authority.

It is a block diagram which shows the structural example of the portable terminal device in Embodiment 1 of this invention. 5 is a flowchart for explaining an operation example (content control method) of the mobile terminal device 100. It is a block diagram which shows the structural example of the portable terminal device (mobile telephone 300) in Embodiment 2 of this invention. 3 is a configuration diagram illustrating a configuration of a management information storage unit 322. FIG. 10 is a flowchart for explaining an operation example (content control method) of the mobile phone 300;

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1]
First, Embodiment 1 of the present invention will be described. FIG. 1 is a configuration diagram showing the configuration of the mobile terminal device 100 according to the embodiment of the present invention. The mobile terminal device 100 includes a user information storage medium 101, a storage unit 102, a reproduction unit 103, a reproduction number counting unit 104, a reproduction number confirmation unit 105, a user information confirmation unit 106, a deletion restriction unit 107, a transmission / reception unit 108, An antenna 109 is provided.

  The user information storage medium 101 stores user information and is detachable from the portable terminal device 100. The storage unit 102 stores the content together with reproduction restriction information indicating the number of times that the content can be reproduced. The content is obtained from, for example, a content service server on a network connected by wireless communication via the transmission / reception unit 108 and the antenna 109. The playback unit 103 plays back the content stored in the storage unit 102. The reproduction count unit 104 counts the number of times the content is reproduced by the reproduction unit 103.

  The reproduction number confirmation unit 105 detects that the reproduction number counted by the reproduction number counting unit 104 is less than or equal to the reproduction possible number of reproduction restriction information stored in the storage unit 102 together with the target content. The user information confirmation unit 106 detects a mismatch between the user information stored in the user information storage medium 101 and the reproduction permitted user information. The deletion restriction unit 107 detects that the number of reproductions is less than or equal to the number of reproductions possible for the reproduction restriction information by the reproduction number confirmation unit 105, and the user information confirmation unit 106 determines that the user information does not match the reproduction permitted user information. While being detected, the content cannot be deleted.

  Next, an operation example (content control method) of the mobile terminal device 100 will be described using the flowchart of FIG.

  First, when the content stored in the storage unit 102 is played back by the playback unit 103 by the user's operation (Y in step S201), the playback count counting unit 104 counts the playback count (step S2020). Thereafter, when an instruction to delete the content by the user's operation is input (Y in step S203), the reproduction number confirmation unit 105 confirms the reproduction number counted by the reproduction number counting unit 104 (step S204). If it is confirmed by this confirmation that the counted number of reproductions exceeds the number of possible reproductions stored in the storage unit 102 corresponding to the content to be deleted (N in step S205), the portable terminal The apparatus 100 deletes the corresponding content according to the input deletion instruction (step S208).

  On the other hand, when the reproduction number confirmation unit 105 confirms that the counted number of reproductions is equal to or less than the reproducible number (Y in step S205), the user information confirmation unit 106 stores the user information storage medium 101 in the user information storage medium 101. It is confirmed that the stored user information matches the reproduction permitted user information (step S206). If the match is confirmed here, the deletion restriction unit 107 disables the deletion of the content to be deleted (step S207). In this case, the deletion instruction input by the user is not executed. In addition, a display indicating that the target content cannot be deleted is displayed on a display unit (not shown) of the mobile terminal device 100.

  As described above, according to the present embodiment, when the number of times of reproduction is equal to or less than the number of times that the reproduction restriction information can be reproduced and the user information and the reproduction-permitted user information are inconsistent, Deletion is considered impossible. As a result, it is possible to protect content that has a limit on the number of times it can be reproduced from being deleted by a user without usage authority.

[Embodiment 2]
Next, a second embodiment of the present invention will be described. FIG. 3 is a configuration diagram showing a configuration of the mobile phone (mobile terminal device) 300 according to the second embodiment. The mobile phone 300 includes a user information storage medium 301, a storage unit 302, a control unit 303, a clock management unit 304, a display unit 305, an input unit 306, a transmission / reception unit 307, and an antenna 308.

  The storage unit 302 includes a content storage unit 321 and a management information storage unit 322. Further, the control unit 303 includes a reproduction function 331, a USIM confirmation function 332, an expiration date confirmation function 333, a reproduction number counting function 334, a reproduction number confirmation function 335, and a deletion restriction function 336.

  The user information storage medium 301 stores user information and is detachable from the mobile phone 300. The user information storage medium 301 is, for example, an IC card defined by 3GPP (3rd Generation Partnership Project) as a USIM (Universal Subscriber Identity Module), and is used for a general mobile phone. Personal information is stored.

  The content storage unit 321 stores (stores) content. The content is obtained from, for example, a content service server on a network connected by wireless communication via the transmission / reception unit 307 and the antenna 308. The management information storage unit 322 stores, as management information (reproduction restriction information), reproduction restriction information indicating the number of times that the content can be reproduced, corresponding to each content stored in the content storage unit 321 (see FIG. 4). . The management information storage unit 322 also stores management information such as information on the expiration date (expiration date) of content and information related to reproduction restrictions in USIM corresponding to the content (see FIG. 4).

For example, as shown in FIG. 4, the management information storage unit 32 2, the file name of the content stored in the content storage unit 321, USIM information, expiration date, reproducible number is stored in correspondence Yes. Depending on the content, an expiration date is not set, but there is a content with a reproducible number of times set. On the other hand, an expiration date is set but a reproducible number of times is not set.

  The control unit 303 reproduces the content stored in the content storage unit 321 by the reproduction function 331. The control unit 303 uses the management information such as the USIM information stored in the management information storage unit 322, the expiration date, and the reproducible number of times to reproduce the content using the reproduction function 331.

  For example, for content in which USIM information is stored as management information, the content is decrypted and played using this USIM information as a key. The USIM information necessary for this reproduction is acquired from the user information storage medium 301 by the USIM confirmation function 332. The USIM confirmation function 332 confirms the match / mismatch between the USIM information (user information) in the user information storage medium 301 and the USIM information (reproduction permitted user information) registered (stored) as management information. Further, the USIM confirmation function 332 takes out the matched USIM information from the user information storage medium 301. By using the USIM information extracted in this way, the playback function 331 plays back the corresponding content. On the other hand, when there is no USIM information matching the management information in the user information storage medium 301, there is no key for decrypting the content, and the content is not reproduced.

  Further, for the content whose expiration date is stored as management information, the expiration date confirmation function 333 acquires information on the current date and time from the clock management unit 304 and compares it with the stored expiration date. In this comparison, if the current date / time has not passed the expiration date, the content is played back, and if the current date / time has passed the expiration date, the content is not played back.

Further, the content reproducible number is stored as the management information, when being detected by Views confirmation function 33 5 that views the playback time counter function 333 has counted is less reproducible number, reproduction Function 331 plays back. In this case, when the number of times of playback has exceeded the number of reproducible times, since it is not the detection described above by Views checker 33 5, so that the reproduction of the content is not performed.

  The deletion restriction function 336 detects that the number of reproductions is equal to or less than the number of reproduction restrictions of the reproduction restriction information by the reproduction number confirmation function 335, and uses the USIM confirmation function 332 to match the currently installed user information storage medium 301. If the information is not confirmed, the content cannot be deleted. In addition to the state where the current number of reproductions is less than or equal to the number of reproductions possible for the reproduction restriction information and the matching USIM information has not been confirmed, the deletion restriction function 336 has an expiration date confirmation function 333 to set the current date and time to the expiration date If it is detected that the content has not passed, the corresponding content cannot be deleted.

  Next, an operation example (content control method) of the mobile phone 300 will be described using the flowchart of FIG.

  First, when the content stored in the content storage unit 321 is played by the user's operation by the playback function 331 of the control unit 303 (Y in step S501), the playback count function 334 counts the playback count (step S501). S5020). Thereafter, when a content deletion instruction is input from the input unit 306 by the user's operation (Y in step S503), first, in step S504, the USIM confirmation function 332 displays the USIM information in the user information storage medium 301. A match / mismatch between the (user information) and the USIM information (reproduction permission user information) stored in the management information storage unit 322 is confirmed.

  In the case of a match (Y in step S504), the control unit 303 receives and executes the input deletion instruction, and deletes the target content file (step S505).

  On the other hand, if they do not match in the confirmation (N in step S504), in the control unit 303, the reproduction number confirmation function 335 confirms the number of reproductions counted by the reproduction number counting function 334 (step S506). Here, when it is confirmed that the counted number of reproductions exceeds the number of possible reproductions stored in the storage unit 102 corresponding to the content to be deleted (N in step S506), the control unit 303 Receives and executes the input deletion instruction, and deletes the corresponding content (step S505).

  Next, when the number-of-plays confirmation function 335 confirms that the counted number of times of reproduction is equal to or less than the number of reproducible times (Y in step S506), the expiration date confirmation function 333 receives the current date and time from the clock management unit 304. And is compared with the stored expiration date (step S507). Here, if it is confirmed that the current date has passed the expiration date (N in Step S507), the control unit 303 receives and executes the input deletion instruction, and deletes the corresponding content (Step S505). ).

  On the other hand, when it is confirmed that the current date and time is within the expiration date (Y in step S507), the deletion restriction function 336 of the control unit 303 disables the deletion of the content to be deleted (step S507). S508). In this case, the deletion instruction input by the user is not executed. Next, the control unit 303 displays a message indicating that the target content cannot be deleted on the display unit 305.

  As described above, according to the present embodiment, the user information and the reproduction-permitted user information are inconsistent, the number of reproductions is less than or equal to the number of reproductions possible for the reproduction restriction information, and in addition, within the expiration date If it is, the corresponding content cannot be deleted. As a result, it is possible to protect content having a limit on the number of times that playback can be performed and an expiration date from being deleted by a user without usage rights.

  The mobile terminal device (mobile phone) is a computer device that includes a CPU, a main storage device, an external storage device, a network connection device, and the like, and the CPU is operated by a program developed in the main storage device. Each function mentioned above is implement | achieved.

  By the way, the present invention is not limited to the embodiments described above, and many modifications can be implemented by those having ordinary knowledge in the art within the technical idea of the present invention. Is obvious. For example, in the above description, a deletion request for one content is described, but the present invention is not limited to this. For example, it can be applied to a batch deletion request for a plurality of contents by repeating the above-described processing. In this case, message output processing for individual contents is not necessary. In the case of a collective deletion request, since the processing can be performed collectively, the effect of the present invention can be further improved.

  DESCRIPTION OF SYMBOLS 100 ... Portable terminal device, 101 ... User information storage medium, 102 ... Memory | storage part, 103 ... Reproduction | regeneration part, 104 ... Reproduction count counting part, 106 ... User information confirmation part, 107 ... Deletion restriction part, 108 ... Transmission / reception part, 109 ... an antenna.

Claims (2)

In mobile terminal devices that can be connected to a network,
A user information storage medium in which user information is stored and detachable from its own device;
Storage means for storing content together with playback restriction information indicating the number of times that the content can be played and playback permission user information indicating information of a user who is permitted to play the content;
Playback means for playing back the content;
A reproduction number counting means for counting the number of times the content has been reproduced by the reproduction means;
A reproduction number confirmation means for detecting that the reproduction number counted by the reproduction number counting means is less than or equal to the reproduction limit number of the reproduction restriction information;
User information confirmation means for detecting a mismatch between the user information stored in the user information storage medium and the reproduction permitted user information;
The reproduction number confirmation means detects that the reproduction number is less than or equal to the reproduction limit number of the reproduction restriction information, and the user information confirmation means detects a mismatch between the user information and the reproduction permitted user information. Delete restriction means for disabling deletion of the content while
Bei to give a,
The content is stored in the storage unit together with expiration date information in addition to the reproduction restriction information and the reproduction permitted user information,
An expiration date checking means for comparing the current date and time and the expiration date information;
The deletion restriction means detects that the number of reproductions is less than or equal to the number of reproducible times of the reproduction restriction information by the reproduction number confirmation means, and the user information and the reproduction permitted user information by the user information confirmation means. While the inconsistency is detected and the current expiration date is confirmed by the expiration date confirmation means to be within the expiration date, the content cannot be deleted,
The user information confirmation means detects a match between the user information stored in the user information storage medium and the reproduction permitted user information;
It said reproducing means, the portable terminal device characterized that you play the content by detection of coincidence between the user information and the reproduction permission user information by said user information confirmation means. In a content control method of a mobile terminal device connectable to a network,
A user information storage medium in which user information is stored and detachable from its own device;
A storage step of storing the content together with reproduction restriction information indicating the number of times the content can be reproduced and reproduction-permitted user information indicating information of a user who is permitted to reproduce the content;
A replay count counting step for counting the number of times the content has been replayed;
A number-of-plays confirmation step for detecting that the number of times counted in the number-of-plays counting step is less than or equal to the number of times that the play restriction information can be played;
A user information confirmation step of detecting a mismatch between the user information stored in the user information storage medium attached to the device and the reproduction-permitted user information;
It is detected in the number-of-plays confirmation step that the number of times of reproduction is less than or equal to the number of times that the reproduction restriction information can be reproduced, and in the user information confirmation step, a mismatch between the user information and the reproduction-permitted user information is detected. A deletion restriction step for disabling the deletion of the content,
Bei to give a,
The content is stored together with expiration date information in addition to the reproduction restriction information and the reproduction permitted user information,
An expiration date confirmation step of comparing the current date and time with the expiration date information,
In the deletion restriction step, it is detected that the number of reproductions is less than or equal to the number of reproductions possible in the reproduction restriction information, and a mismatch between the user information and the reproduction-permitted user information is detected, and in the expiration date confirmation step While it is confirmed that the current date and time is within the expiration date, the content cannot be deleted,
In the user information confirmation step, a match between the user information stored in the user information storage medium and the reproduction permitted user information is detected,
A content control method , wherein the content can be played back when a match between the user information and the playback-permitted user information is detected in the user information confirmation step .

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