JP5296969B2 - Mobile terminal device having user data leakage prevention function, user data leakage prevention method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal apparatus capable of simply and surely preventing the leakage of user data. <P>SOLUTION: The portable terminal apparatus is provided with an automatic erasing target data specification means (M27) for specifying the sort of user data to be automatically erased and an automatic erasing time interval specification means (M23) for setting a time interval for automatically erasing the user data of the specified sort and performs operation for logically erasing the user data of the sort specified as the automatic erasing target. The portable terminal apparatus is provided with a function (M2D) for restoring logically automatically erased user data and reusing the restored data when a menu number (4-digit code) for requesting the restoration of the data is input. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a portable terminal device having a user data leakage prevention function, a user data leakage prevention method, and a program, and by erasing or disabling user data at predetermined time intervals, the terminal is lost or peeped. The present invention relates to a portable terminal device having a function for preventing leakage of user data of the type provided in the above, a method for preventing leakage of user data, and a program.

  Various proposals have been made regarding a function for preventing a registered person from knowing user data such as a registered telephone directory, sent / received mail, outgoing / incoming call history, album image, etc. when a mobile phone or the like is lost. For example, a remote lock function that can lock a mobile phone by making a call to its own mobile phone via a public telephone or the like is realized, but cannot be operated when the mobile phone is in an out-of-service area It can be considered. Therefore, for example, Japanese Patent Application Laid-Open No. 2006-128889 discloses a portable terminal that automatically activates an authentication function when out of service area and requests user authentication when browsing personal information.

  Further, although not intended for measures against leakage of personal information, Japanese Patent Application Laid-Open No. 2006-135751 discloses a mobile terminal having a function of automatically deleting user data in the mobile terminal.

JP 2006-128889 A JP 2006-135751 A

  However, the above-described method of Patent Document 1 has a problem that even in the out-of-service area, even a valid user has to input authentication information. The technique disclosed in Patent Document 2 is also for avoiding the loss of a limited free space in the built-in memory, and is insufficient as a countermeasure against leakage of user data. For example, in the mobile phone described in the publication, automatic deletion of e-mails, etc. is performed with the deletion conditions specified by date and capacity and at the specified timing, but user data is lost until the timing of automatic deletion comes when lost. In addition to being unprotected, there is a possibility that user data leaked from specified conditions may be peeped.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a portable terminal device, a user data leakage prevention method, and a program that can easily and reliably prevent leakage of user data.

  According to the first aspect of the present invention, automatic erasure data selection means for designating the type of user data to be automatically erased, and automatic erasure time for setting a time interval for automatically erasing the designated type of user data A portable terminal device comprising: interval setting means; and user data automatic erasing means for erasing user data of the type specified as the target of automatic erasure at the set time interval. Provided.

  According to the present invention, leakage of personal information can be reliably prevented with a simple operation. The reason is that a user data erasing mechanism that automatically operates even when lost is provided.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the mobile terminal 100 according to the first embodiment of the present invention. Referring to FIG. 1, a mobile terminal 100 such as a mobile phone having a control unit 110, a display device 120, an input device 130, and a memory 140 to which user data 140a is registered and a PDA (Personal Digital Assistant) is shown. .

  2 and 3 are menu configuration diagrams realized by a program stored in the memory 140 of the portable terminal 100. FIG. Referring to FIG. 2, submenu items M22 to M2F are assigned to menu XX (XX is an arbitrary two-digit number set at the time of shipment) assigned to realize the user data automatic erasing function at the top layer, and below M21. It is prepared.

  The user data automatic erasing function is turned on / off by selecting an ON setting M22 and an OFF setting M2F immediately below the menu XX. In this embodiment, a password or biometric information is not requested for various operations related to the user data automatic deletion function and the user data restoration function. However, the usage of the mobile terminal 100 and the user data to be protected Depending on the type, it is also possible to require the input of a password or biometric information for the above-described operations, particularly when restoring user data, and to make user authentication successful.

  When the ON setting M22 directly under the menu XX is selected, three selection items of user data automatic erasure time interval designation M23, user data automatic erasure target data designation M27, and user data automatic erasure data restoration menu setting M2D are displayed.

  The time interval at which user data is automatically erased is selected such as 1 hour (every) M24, 3 hours (every) M25, 5 hours (every) M26 after selecting the user data automatic erasing time interval designation M23 immediately below the ON setting M22. It can be specified in units.

  The type of user data to be automatically deleted is selected from the user data automatic deletion target data designation M27 immediately below the ON setting M22, and then the data types such as the telephone book M28, the received mail M29, the transmitted mail M2A, the incoming call history M2B, and the outgoing call history M2C. Each can be specified.

  Further, the user data automatic erased data restoration menu setting M2D directly under the ON setting M22 is selected, and the 4-digit code setting M2E is selected to request restoration of the data erased by the user data automatic erase function. Menu number (a 4-digit code that can be freely set by the user) can be set.

  FIG. 3 is a diagram showing a sub-menu below menu XXXX which is activated when the 4-digit code set in the 4-digit code setting M2E below the data restoration menu setting M2D is input, and the menu XXXM31 is activated. Thereafter, the user data restoration function can be turned on / off by selecting the ON setting M33 and the OFF setting M34 immediately below the user data restoration M32.

  FIG. 4 is a diagram showing the configuration of user data 140a in the present embodiment. In the present invention, not only data can be erased but also restored, so that user data is not physically erased, but each user data has No, management information, and data.

  Management information can be set in three states: “valid” (viewable state), “invalid 1” (deleted by user operation), and “invalid 2” (deleted by the automatic deletion function). The user data for which invalid 1 is set cannot be restored by the user data restoration function.

  Note that the configuration in FIG. 4 and the management information are for explanation, and the actual storage format of user data, especially the management information is encrypted by an appropriate method. It is configured so that it cannot be restored.

  Next, the overall operation of the mobile terminal 100 will be described in detail with reference to the drawings. FIG. 5 is a flowchart showing a series of processes executed in the mobile terminal 100 according to the present embodiment.

  Referring to FIG. 5, first, the mobile terminal 100 refers to an internal flag or the like to check whether or not the user data automatic erasure function is turned on (step S11), and the user data automatic erasure function is turned on. The user data specified by the user data automatic deletion target data specification M27 is logically deleted by updating the management information at the time interval specified by the user data automatic deletion time interval specification M23. It performs (step S12). On the other hand, when the user data automatic erasure function is OFF, the mobile terminal 100 does not automatically erase the user data (step S13).

  Furthermore, when the user inputs a menu number (four-digit code) for requesting data restoration (YES in step S14), the mobile terminal 100 refers to the user data management information, and It is confirmed whether or not the data restoration function is set to ON (step S15). If the data restoration function is set to ON, the entry in which the management information illustrated in FIG. 4 is “invalid 2” is returned to “valid”, and the user data is restored (step S16).

  Even if a menu number (four-digit code) for requesting data restoration is input, if the user data restoration function is set to OFF, the user data restoration is not performed (step NO of S15).

  As described above, according to the mobile terminal 100 according to the present embodiment, even if it is lost, the user data is automatically deleted, and the possibility of misuse by others is reduced. The reason for this is that a mechanism for securely deleting the selected user data at a set time interval is provided.

  In addition, since the mobile terminal 100 according to the present embodiment has a function of restoring the user data that has been automatically deleted, the usability does not deteriorate.

  Next, a second embodiment of the present invention in which the menu configuration of the first embodiment is changed will be described in detail with reference to the drawings. Hereinafter, the matters already described in the first embodiment will be omitted, and the differences will be described.

  FIG. 6 is a menu configuration diagram of the mobile terminal 100 according to the present embodiment. The difference from FIG. 2 showing the menu configuration of the first embodiment is that an arbitrary time can be set as a time interval for automatically deleting user data (see M54 in FIG. 6), and automatic deletion is performed. As selection items of user data to be performed, an album image (see M5B in FIG. 6), an application (see M5C in FIG. 6), and a full designation (M5D in FIG. 6) for designating all of the phone book to application are added. Is a point.

  Other operations are the same as those in the first embodiment described above, but it is possible to specify the execution time interval for automatic erasure in units of time such as in the range of 1 hour to 10 hours, or in minutes or days. And

  In the present embodiment, since the album image (see M5B in FIG. 6) and the application (see M5C in FIG. 6) are also subject to automatic erasure, leakage of application data and the like to which photos and personal information are input is prevented. It becomes possible to do.

  The preferred embodiments of the present invention have been described above. However, these embodiments describe preferred embodiments known to the applicant of the present application, and various modifications can be made without departing from the gist of the present invention. Needless to say, it can be added. For example, in the above-described embodiment, the phone book, received mail, outgoing mail, incoming call history, outgoing call history, album image, and application can be set as deletion targets. It is also possible to add image data, schedule data, spreadsheet data, etc. to the erasure target.

  Further, in the above-described embodiment, it has been described that various setting functions can be activated with a 2-digit to 4-digit code, but other operation interfaces may be employed. For example, the user data automatic erasure function and the user data restoration function can be turned on / off, and erasure or restoration can be performed by long-pressing a specific button or simultaneously depressing two or more buttons.

  In the above-described embodiment, the user data is automatically deleted at the time interval specified by the user data automatic deletion time interval specification M23 (M53). However, for each user data to be deleted, In addition, the execution time interval of automatic erasure can be set individually.

  Further, in the above-described embodiment, by using FIG. 4, various user data is provided with management information, the management information of user data deleted by user operation is set to “invalid 1”, and deleted by the automatic deletion function. Although it has been described that the management information of user data is “invalid 2”, data deleted by a user operation may be physically deleted. On the other hand, the user data set to “invalid 1” may be restored when a specific operation is performed.

It is a block diagram showing the structure of the portable terminal which concerns on the 1st Embodiment of this invention. It is a figure showing the structure of a part (user data automatic deletion function) of the menu of the portable terminal which concerns on the 1st Embodiment of this invention. It is a figure showing the structure of a part of menu (user data restoration function) of the portable terminal which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the structure of the user data stored in the memory of the portable terminal which concerns on the 1st Embodiment of this invention. It is a flowchart showing a series of processes performed in the portable terminal which concerns on the 1st Embodiment of this invention. It is a figure showing the structure of some menus (user data automatic deletion function) of the portable terminal which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Portable terminal 110 Control part 120 Display apparatus 130 Input apparatus 140 Memory 140a User data M21-M2F, M31-M34, M51-M5G Menu item

Claims (6)

Automatic erasure data selection means for specifying the type of user data to be automatically erased;
Automatic erasure time interval setting means for setting a time interval for automatically erasing the specified type of user data;
User data automatic erasure means for erasing the type of user data designated as the target of automatic erasure at the set time interval,
The portable terminal device characterized by this. The user data automatic erasure means logically erases data by updating management information of user data,
Furthermore, when a predetermined operation is performed, the management information of the user data is restored, and user data restoration means for enabling the user data to be referred to again is provided.
The mobile terminal device according to claim 1. A mobile terminal program that implements a function for preventing leakage of user data registered in a terminal,
A process of accepting the type of user data to be automatically deleted from the user;
A process of accepting a time interval for automatically erasing data targeted for automatic erasure from a user;
A program for a portable terminal that causes a portable terminal device to execute a process of erasing user data of a type specified as a target for automatic erasure at the set time interval. The automatic deletion process of the user data is performed by logically deleting the data by updating the management information of the user data,
The portable terminal program according to claim 3, wherein when a predetermined operation is performed, the portable terminal device executes a process for restoring the management information of the user data and making it referable again. A method for preventing leakage of user data registered in a mobile terminal device,
The portable terminal device accepting a type of user data to be automatically erased from a user;
The portable terminal device accepting a time interval for automatically erasing the data to be automatically erased from a user;
The portable terminal device erasing the type of user data designated as the target of automatic erasure at the set time interval,
A method for preventing leakage of user data. The automatic deletion of the user data is performed by logically deleting the data by updating the management information of the user data,
The portable terminal device further includes a step of restoring the management information of the user data so that it can be referred to again when a predetermined operation is performed.
The method for preventing leakage of user data according to claim 5.

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