WO2016152539A1

WO2016152539A1 - Information terminal, information management system, illegibility rendering method, and program

Info

Publication number: WO2016152539A1
Application number: PCT/JP2016/057449
Authority: WO
Inventors: 正志長田
Original assignee: 日本電気株式会社
Priority date: 2015-03-23
Filing date: 2016-03-09
Publication date: 2016-09-29
Also published as: JP2018101161A

Abstract

Provided is an information terminal, comprising a communication monitoring unit which detects a communication state between the information terminal and a communication device, and an illegibility rendering unit which renders data stored in a storage unit illegible if the detected communication state is a prescribed communication state.

Description

Information terminal, information management system, deciphering method and program

The present invention relates to an information terminal, an information management system, a deciphering method, and a program.

In recent years, portable information terminals for browsing information such as electronic paper terminals and tablet terminals have become widespread. The user can browse the information at an arbitrary place by recording desired information in a storage unit built in the information terminal.
Patent Document 1 discloses an invention that prevents data leakage by erasing the display of data of at least a part of the information terminal when the electronic paper is removed from a predetermined holding means.

Japanese Unexamined Patent Publication No. 2012-145682

However, the information terminal includes a storage unit for storing data to be displayed on the display unit. Therefore, even if the display is erased, it is impossible to prevent the information terminal from being obtained by a third party and reading data from the storage unit of the information terminal.
An example of the object of the present invention is to provide an information terminal, an information management system, a deciphering method, and a program that solve the above-described problems.

According to the first aspect of the present invention, the information terminal includes a communication monitoring unit that detects a communication state between the information terminal and the communication device, and the detected communication state is a predetermined communication state. And a decryption disable unit for disabling the decryption of data stored in the storage unit.

According to the second aspect of the present invention, the information management system includes the information terminal and the communication device.

According to the third aspect of the present invention, the deciphering disable method for an information terminal detects a communication state between the information terminal and a communication device, and the detected communication state is a predetermined communication state. In some cases, the data stored in the storage unit cannot be decrypted.

According to the fourth aspect of the present invention, when the program detects a communication state between the computer and the communication device, and the detected communication state is a predetermined communication state, the storage unit To make the data stored in the memory unreadable.

According to at least one of the above aspects, the information terminal accesses the data stored in the storage unit when the communication state between the information terminal and the communication device is a predetermined communication state. Make it impossible. Accordingly, the information terminal can prevent data from being read from the storage unit by a third party.

It is a schematic block diagram which shows the structure of the information management system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic paper terminal which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the electronic paper terminal which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram which shows the structure of the information management system which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic paper terminal which concerns on 3rd Embodiment. It is a flowchart which shows operation | movement of the electronic paper terminal which concerns on the 4th Embodiment of this invention. It is a schematic block diagram which shows the structure of the information management system which concerns on the 5th Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic paper terminal which concerns on 5th Embodiment. It is a schematic block diagram which shows the basic composition of the information management system which concerns on embodiment of this invention.

<< First Embodiment >>
Hereinafter, the first embodiment will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing the configuration of the information management system according to the first embodiment.
The information management system 1 according to the first embodiment includes an electronic paper terminal 100 and a pairing terminal 200.
The electronic paper terminal 100 is an information terminal that displays data in a nonvolatile manner. An example of a method for displaying data in a nonvolatile manner is a method in which particles of different colors are electrophoresed in microcapsules containing fluids. Another example is a method of inverting microcapsules having different colors on each side. Yet another example is a method using cholesteric liquid crystal.
The pairing terminal 200 is a terminal registered for pairing with the electronic paper terminal 100. “Pairing” refers to performing mutual authentication processing in order to communicate between two devices. For example, the pairing terminal 200 and the electronic paper terminal 100 generate a unique identification ID (identifier) by pairing, and record the identification ID as a link key in both terminals. Then, the pairing terminal 200 and the electronic paper terminal 100 can determine whether or not the partner terminal has registered for pairing by determining whether or not the partner terminal has the identification ID. Specific examples of the pairing terminal 200 include a radio frequency identifier (RFID) terminal such as a smartphone, a smart watch, a beacon transmitter, and a contactless IC (Integrated Circuit) card. The pairing terminal 200 is a terminal carried by the user of the electronic paper terminal 100. The pairing terminal 200 is an example of a communication device.

The electronic paper terminal 100 includes a CPU 110, a main storage device 120, an auxiliary storage device 130, an interface 140, a display device 150, an input device 160, and a communication device 170.
The CPU 110 controls the electronic paper terminal 100 by executing a program recorded in the auxiliary storage device 130.
The main storage device 120 temporarily stores data used in a program executed by the CPU 110.
The auxiliary storage device 130 is a device that stores data in a nonvolatile manner. The auxiliary storage device 130 includes a program storage unit 131, a pairing information storage unit 132, and a content storage unit 133. The program storage unit 131 stores a program to be executed by the CPU 110. The pairing information storage unit 132 stores the identification ID of the pairing terminal 200. The content storage unit 133 stores content data to be displayed on the display device 150.
The interface 140 is provided to connect the electronic paper terminal 100 and an external device.

The display device 150 displays the data stored in the auxiliary storage device 130 in a nonvolatile manner. The display device 150 is realized by electronic paper, for example.
The input device 160 receives an input to the electronic paper terminal 100 from a user. The input device 160 is realized by, for example, a touch pad superimposed on the display device 150, a button arranged on a housing, or other input devices.
Communication device 170 performs near field communication with pairing terminal 200. Examples of near field communication methods include wireless LAN, Bluetooth (registered trademark), ZigBee (registered trademark), and the like.

The CPU 110 reads the program from the auxiliary storage device 130, expands it in the main storage device 120, and executes the program, whereby the input unit 111, the data acquisition unit 112, the display control unit 113, the communication monitoring unit 114, and the unreadable decoding (In other words, the CPU 110 exhibits functions as the function units 111 to 115 by executing a program).
The input unit 111 receives input from the user to the input device 160.
The data acquisition unit 112 acquires content data from the content storage unit 133 of the auxiliary storage device 130.
The display control unit 113 controls display on the display device 150.
The communication monitoring unit 114 monitors the communication state of the communication device 170 with the pairing terminal 200 (communication state between the communication device 170 of the electronic paper terminal 100 and the pairing terminal 200).
The decryption disabler 115 erases the content data recorded in the content storage 133 of the auxiliary storage device 130 under a predetermined condition. Specific examples of the content data erasing method include a method of deleting data recorded in the decryption disabler 115 and a method of overwriting a fixed pattern or random number in the decryption disabler 115. Erasing content data is an example of making decryption impossible.

The pairing terminal 200 includes an identification ID holding unit 201, a control unit 202, and a communication unit 203.
The identification ID holding unit 201 stores an identification ID used for pairing with the electronic paper terminal 100.
The control unit 202 attempts to communicate with the electronic paper terminal 100 via the communication unit 203 using the identification ID stored in the identification ID holding unit 201.
The communication unit 203 communicates with the electronic paper terminal 100 by short-range wireless communication.

An operation of the electronic paper terminal 100 according to the first embodiment will be described.
FIG. 2 is a flowchart showing the operation of the electronic paper terminal according to the first embodiment.
The communication monitoring unit 114 of the electronic paper terminal 100 causes the communication device 170 to search for the pairing terminal 200 (step S1). The communication monitoring unit 114 determines whether the pairing terminal 200 is recognized by the search (step S2). That is, the communication monitoring unit 114 searches for the pairing terminal 200 having the same identification ID as the identification ID stored in the pairing information storage unit 132.

When the communication monitoring unit 114 recognizes the pairing terminal 200 (step S2: YES), the display control unit 113 displays a lock release screen on the display device 150 (step S3).
Specific examples of the unlock screen include a home screen, a selection screen for content to be displayed, and a display screen for content that was previously displayed. Then, the CPU 110 operates the electronic paper terminal 100 in the normal operation mode (step S4). The normal operation mode refers to an operation mode in which data stored in the content storage unit 133 is displayed on the display device 150 based on an input to the input device 160. That is, when the CPU 110 is operating in the normal operation mode, the data acquisition unit 112 acquires content data from the content storage unit 133 based on the input to the input device 160 received by the input unit 111, and the display control unit 113. Causes the display device 150 to display the content indicated by the content data. When the CPU 110 is operating in the normal operation mode, the display control unit 113 controls the content displayed on the display device 150 based on the input to the input device 160 received by the input unit 111. Specific examples of content control include content enlargement and reduction, page operation, and character input.

While the CPU 110 is operating in the normal operation mode, the communication monitoring unit 114 determines whether or not communication with the pairing terminal 200 is continued (step S5). When communication with the pairing terminal 200 is continued (step S5: YES), the process returns to step S4, and the CPU 110 continues the operation in the normal operation mode.

A case where the communication monitoring unit 114 cannot recognize the pairing terminal 200 (step S2: NO) or a case where communication with the pairing terminal 200 is disconnected (step S5: NO) will be described. In these cases, the display control unit 113 displays a predetermined lock screen on the display device 150 (step S6). That is, the display control unit 113 displays a predetermined lock screen on the display device 150 when the connection with the pairing terminal 200 is not established. This is because it is presumed that the content displayed on the display device 150 may be viewed by a third party when the user is away from the electronic paper terminal 100 by a predetermined distance or more. In another embodiment, the display control unit 113 may cause the display device 150 to display a predetermined lock screen when the radio wave intensity related to communication with the pairing terminal 200 becomes less than a predetermined value. The fact that the connection with the pairing terminal 200 is not established and the radio wave intensity related to the communication with the pairing terminal 200 is less than a predetermined value are both examples of the predetermined communication state. The lock screen is a screen that does not cause a problem even if viewed by a third party. An example of the lock screen is a solid color screen. Another example of the lock screen is a screen that displays a predetermined image preinstalled in the electronic paper terminal 100 that is not stored in the content storage unit 133. Yet another example of the lock screen is a screen that displays data specified in advance by the user among the content data stored in the content storage unit 133. The display control unit 113 may display the lock screen on the display device 150 after refreshing the display device 150 in order not to leave an afterimage of the content.

Next, the input unit 111 determines whether there is an input to the input device 160 (step S7). That is, the input unit 111 determines whether or not someone has operated the input device 160. When it is determined that there is no input to the input device 160 (step S7: NO), the electronic paper terminal 100 returns to step S1 and starts searching for the pairing terminal 200. On the other hand, when it is determined that there is an input to the input device 160 (step S7: YES), the decryption disabler 115 deletes all the content data stored in the content storage 133 (step S8). This is because it is presumed that the electronic paper terminal 100 was operated by a third party because the electronic paper terminal 100 was operated even though the user did not exist near the electronic paper terminal 100.

Thus, according to this embodiment, the electronic paper terminal 100 includes the communication monitoring unit 114 that detects the communication state between the electronic paper terminal 100 (communication device 170) and the pairing terminal 200, and the communication monitoring unit 114. And a decryption disabler 115 that disables the decryption of data (content data) stored in the content storage unit 133 when the communication state detected by the above is a predetermined communication state. Thus, the electronic paper terminal 100 can prevent the third party from accessing the content data when there is a possibility that the electronic paper terminal 100 is operated by the third party. Therefore, according to the present embodiment, it is possible to prevent content data from being read from the content storage unit 133 even if the electronic paper terminal 100 is obtained by a third party.

Further, according to the present embodiment, the decryption disabler 115 is configured such that the content storage unit 133 is detected when a predetermined communication state is detected by the communication monitoring unit 114 and the electronic paper terminal 100 (input unit 111) is operated. Disables decryption of the content data stored in Thereby, when it is estimated that the electronic paper terminal 100 is operated by the third party, the electronic paper terminal 100 can prevent the third party from accessing the content data. Therefore, according to the present embodiment, even if the user temporarily leaves the electronic paper terminal 100, the user can browse the content again with the electronic paper terminal 100 unless operated by a third party. .

Further, according to the present embodiment, the display control unit 113 displays the lock screen on the display device 150 that displays the content data before the decryption disable unit 115 disables the decryption of the content data. Accordingly, the electronic paper terminal 100 can prevent the third party from browsing the content when the electronic paper terminal 100 may be browsed by a third party.
In particular, according to the present embodiment, the display control unit 113 causes the display device 150 to display a predetermined screen when the communication monitoring unit 114 detects a predetermined communication state. The decryption disabler 115 disables the decryption of the content data stored in the content storage unit 133 when the communication monitoring unit 114 detects a predetermined communication state and the device itself is operated. Accordingly, the electronic paper terminal 100 can prevent the content from being displayed when the electronic paper terminal 100 can be browsed by a third party. Furthermore, the electronic paper terminal 100 can prevent access to the content data when it is estimated that the electronic paper terminal 100 has been operated by a third party. Therefore, according to the present embodiment, when the user temporarily leaves the electronic paper terminal 100, the content cannot be viewed by a third party. Further, unless operated by a third party, the user can browse the content again with the electronic paper terminal 100.

<< Second Embodiment >>
Hereinafter, the second embodiment will be described in detail with reference to the drawings.
The electronic paper terminal 100 according to the first embodiment erases content data stored in the content storage unit 133 when there is an input to the input device 160 when the connection with the pairing terminal 200 is not established. To do. In this case, when the user carelessly does not have the pairing terminal 200 and when the power of the pairing terminal 200 is turned off, the content may be erased against the user's will. is there. Therefore, the electronic paper terminal 100 according to the second embodiment stores the content storage unit 133 immediately even if there is an input to the input device 160 when the connection with the pairing terminal 200 is not established. Do not erase content data.

The electronic paper terminal 100 according to the second embodiment is different from the first embodiment in the operations of the display control unit 113 and the deciphering disabler 115. When there is an input to the input device 160 while the connection with the pairing terminal 200 is not established, the display control unit 113 displays a message requesting the connection with the pairing terminal 200 on the display device 150. . When the connection with the pairing terminal 200 is not established, the decryption disabler 115 erases the content data stored in the content storage unit 133 when the input to the input device 160 is performed a predetermined number of times or more. In the main storage device 120, an area for storing the count value of the number of operations by the deciphering disabler 115 is secured.

An operation of the electronic paper terminal 100 according to the present embodiment will be described.
FIG. 3 is a flowchart showing the operation of the electronic paper terminal according to the second embodiment.
The communication monitoring unit 114 of the electronic paper terminal 100 causes the communication device 170 to search for the pairing terminal 200 (step S21). The communication monitoring unit 114 determines whether or not the pairing terminal 200 has been recognized by the search (step S22). When the communication monitoring unit 114 recognizes the pairing terminal 200 (step S22: YES), the display control unit 113 displays a lock release screen on the display device 150 (step S23). Then, the CPU 110 operates the electronic paper terminal 100 in the normal operation mode (Step S24).

While the CPU 110 is operating in the normal operation mode, the communication monitoring unit 114 determines whether or not the communication with the pairing terminal 200 is continued (step S25). When communication with the pairing terminal 200 is continued (step S25: YES), the process returns to step S24, and the CPU 110 continues the operation in the normal operation mode.

A case where the communication monitoring unit 114 cannot recognize the pairing terminal 200 (step S22: NO) or a case where communication with the pairing terminal 200 is disconnected (step S25: NO) will be described. In these cases, the display control unit 113 displays a predetermined lock screen on the display device 150 (step S26). Next, the input unit 111 determines whether there is an input to the input device 160 (step S27). When it is determined that there is no input to the input device 160 (step S27: NO), the electronic paper terminal 100 returns to step S21 and starts searching for the pairing terminal 200. On the other hand, if it is determined that there is an input to the input device 160 (step S27: YES), the deciphering disabler 115 adds the count value of the number of operations stored in the main storage device 120 (step S28).

Next, the deciphering unit 115 determines whether or not the count value of the number of operations stored in the main storage device 120 is equal to or greater than a predetermined threshold (for example, 5 times) (step S29). When the count value is less than the threshold value (step S29: NO), the electronic paper terminal 100 returns to step S21 and starts searching for the pairing terminal 200. On the other hand, when the count value is equal to or greater than the threshold value (step S29: YES), the decryption disabler 115 deletes all content data stored in the content storage 133 (step S30).

As described above, according to the present embodiment, the decryption disabler 115 detects the predetermined communication state by the communication monitoring unit 114, and when the own device (electronic paper terminal 100) is operated more than a predetermined number, The data in the content storage unit 133 is made undecipherable. Thereby, even if the user operates the electronic paper terminal 100 when there is no connection with the pairing terminal 200, the user immediately establishes a connection between the electronic paper terminal 100 and the pairing terminal 200, It is possible to prevent access to the content data from being disabled.

<< Third Embodiment >>
Hereinafter, the third embodiment will be described in detail with reference to the drawings.
FIG. 4 is a schematic block diagram showing the configuration of the information management system according to the third embodiment.
The electronic paper terminal 100 according to the first embodiment erases content data stored in the content storage unit 133 when there is an input to the input device 160 when the connection with the pairing terminal 200 is not established. To do. In contrast, the electronic paper terminal 100 according to the third embodiment stores content stored in the content storage unit 133 when the electronic paper terminal 100 moves when the connection with the pairing terminal 200 is not established. Erase the data.

The electronic paper terminal 100 according to the third embodiment further includes an acceleration sensor 180 in addition to the configuration of the first embodiment. The acceleration sensor 180 is connected to the CPU 110 via the interface 140. The interface 140 converts the signal output from the acceleration sensor 180 into a signal that can be read by the CPU 110. The CPU 110 according to the third embodiment further includes a sensor value acquisition unit 116 in addition to the configuration of the first embodiment. The sensor value acquisition unit 116 acquires a sensor value indicating acceleration based on a signal output from the interface 140. Further, the electronic paper terminal 100 according to the third embodiment is different from the first embodiment in the operation of the decryption disabler 115. The deciphering unit 115 erases the content data stored in the content storage unit 133 when the sensor value exceeds a predetermined threshold value while the connection with the pairing terminal 200 is not established.

An operation of the electronic paper terminal 100 according to the present embodiment will be described.
FIG. 5 is a flowchart showing the operation of the electronic paper terminal according to the third embodiment.
The communication monitoring unit 114 of the electronic paper terminal 100 causes the communication device 170 to search for the pairing terminal 200 (step S41). The communication monitoring unit 114 determines whether the pairing terminal 200 has been recognized by the search (step S42). When the communication monitoring unit 114 recognizes the pairing terminal 200 (step S42: YES), the display control unit 113 displays a lock release screen on the display device 150 (step S43). Then, the CPU 110 operates the electronic paper terminal 100 in the normal operation mode (Step S44).

While the CPU 110 is operating in the normal operation mode, the communication monitoring unit 114 determines whether or not the communication with the pairing terminal 200 is continued (step S45). When communication with the pairing terminal 200 is continued (step S45: YES), the process returns to step S44, and the CPU 110 continues the operation in the normal operation mode.

When the communication monitoring unit 114 cannot recognize the pairing terminal 200 (step S42: NO), or when communication with the pairing terminal 200 is disconnected (step S45: NO), the display control unit 113 controls the display device 150. A predetermined lock screen is displayed (step S46). Next, the sensor value acquisition unit 116 determines whether or not the sensor value indicated by the signal output from the acceleration sensor 180 and converted by the interface 140 is equal to or greater than a predetermined threshold (step S47). That is, the sensor value acquisition unit 116 determines whether or not someone has moved the input device 160. If the sensor value is less than the predetermined threshold (step S47: NO), the electronic paper terminal 100 returns to step S41 and starts searching for the pairing terminal 200. On the other hand, when the sensor value is equal to or greater than the predetermined threshold (step S47: YES), the decryption disabler 115 deletes all the content data stored in the content storage 133 (step S48). This is because the electronic paper terminal 100 is estimated to have been transported by a third party because the electronic paper terminal 100 has moved even though the user does not exist near the electronic paper terminal 100.

As described above, according to the present embodiment, the decryption disabler 115 disables the decryption of the data in the content storage unit 133 when the communication monitoring unit 114 detects a predetermined communication state and the own device moves. I do. Thereby, when it is estimated that the electronic paper terminal 100 is transported by a third party, the electronic paper terminal 100 can prevent the third party from accessing the content data. Therefore, according to the present embodiment, even if the user temporarily leaves the electronic paper terminal 100, the user can browse the content again by the electronic paper terminal 100 as long as the user is not transported by a third party. .

Similarly to the second embodiment, the deciphering disabler 115 according to another embodiment determines that the number of inputs to the input device 160 is greater than or equal to a threshold value, and the number of times that the sensor value is greater than or equal to the threshold value When it is determined that the number has exceeded the number, the data in the content storage unit 133 may be made unreadable. Thereby, even if the user moves the electronic paper terminal 100 when there is no connection with the pairing terminal 200, the user immediately establishes a connection between the electronic paper terminal 100 and the pairing terminal 200. It is possible to prevent access to the content data from being disabled.

Although the electronic paper terminal 100 according to the present embodiment determines the presence or absence of movement based on the sensor value of the acceleration sensor 180, the embodiment of the present invention is not limited thereto. For example, the electronic paper terminal 100 according to another embodiment may determine the presence or absence of movement based on a satellite positioning system such as GPS (Global Positioning System). In this case, when the difference between the position information obtained from the satellite positioning system last time and the position information obtained this time is equal to or greater than a predetermined threshold, the electronic paper terminal 100 has moved (the electronic paper terminal 100). Is determined. The threshold value is larger than the error of the satellite positioning system.

<< Fourth Embodiment >>
Hereinafter, the fourth embodiment will be described in detail with reference to the drawings.
The electronic paper terminal 100 according to the third embodiment erases the content data stored in the content storage unit 133 when the device moves in a state where the connection with the pairing terminal 200 is not established. In this case, when the user carelessly does not have the pairing terminal 200 and when the power of the pairing terminal 200 is turned off, the content may be erased against the user's will. is there. Therefore, the electronic paper terminal 100 according to the fourth embodiment immediately stores the content storage unit 133 even if the electronic paper terminal 100 is moved in a state where the connection with the pairing terminal 200 is not established. Do not erase content data.

The operation of the electronic paper terminal 100 according to the fourth embodiment is different from that of the third embodiment in the operations of the display control unit 113 and the decryption disable unit 115. When there is an input to the input device 160 in a state where the connection with the pairing terminal 200 is not established, the display control unit 113 displays a message requesting the connection with the pairing terminal 200 on the display device 150. . When the connection with the pairing terminal 200 is not established, the decryption disabler 115 establishes the connection with the pairing terminal 200 again until a predetermined time elapses from the time when the movement of the own device is detected. If not established, the content data stored in the content storage unit 133 is erased. In the main storage device 120, an area for storing the elapsed time from the time when the movement of the own device is detected is secured.

An operation of the electronic paper terminal 100 according to the present embodiment will be described.
FIG. 6 is a flowchart showing the operation of the electronic paper terminal according to the fourth embodiment.
The communication monitoring unit 114 of the electronic paper terminal 100 causes the communication device 170 to search for the pairing terminal 200 (step S61). The communication monitoring unit 114 determines whether or not the pairing terminal 200 is recognized by the search (step S62). When the communication monitoring unit 114 recognizes the pairing terminal 200 (step S62: YES), the display control unit 113 displays a lock release screen on the display device 150 (step S63). Then, the CPU 110 operates the electronic paper terminal 100 in the normal operation mode (Step S64).

While the CPU 110 is operating in the normal operation mode, the communication monitoring unit 114 determines whether or not the communication with the pairing terminal 200 is continued (step S65). When communication with the pairing terminal 200 is continued (step S65: YES), the process returns to step S64, and the CPU 110 continues the operation in the normal operation mode.

A case where the communication monitoring unit 114 cannot recognize the pairing terminal 200 (step S62: NO) or a case where communication with the pairing terminal 200 is disconnected (step S65: NO) will be described. In these cases, the display control unit 113 displays a predetermined lock screen on the display device 150 (step S66). Next, the sensor value acquisition unit 116 determines whether or not the sensor value indicated by the signal output from the acceleration sensor 180 and converted by the interface 140 is equal to or greater than a predetermined threshold (step S67). If the sensor value is less than the predetermined threshold (step S67: NO), the electronic paper terminal 100 returns to step S61 and starts searching for the pairing terminal 200. On the other hand, when the sensor value is equal to or greater than the predetermined threshold (step S67: YES), the deciphering disabler 115 starts measuring the elapsed time from the current time (step S68).

The communication monitoring unit 114 causes the communication device 170 to search for the pairing terminal 200 (step S69). The communication monitoring unit 114 determines whether the pairing terminal 200 has been recognized by the search (step S70). When the communication monitoring unit 114 recognizes the pairing terminal 200 (step S70: YES), the electronic paper terminal 100 returns to step S63 and causes the display device 150 to display the unlock screen. On the other hand, when the communication monitoring unit 114 does not recognize the pairing terminal 200 (step S70: NO), the deciphering disabler 115 sets the elapsed time stored in the main storage device 120 to a predetermined threshold (for example, 5 minutes) or more. It is determined whether or not (step S71). When the elapsed time is less than the threshold (step S71: NO), the electronic paper terminal 100 returns to step S69 and continues the search for the pairing terminal 200. On the other hand, when the elapsed time is equal to or greater than the threshold (step S71: YES), the decryption disabler 115 deletes all the content data stored in the content storage 133 (step S72).

As described above, according to the present embodiment, the deciphering disabler 115 detects the predetermined communication state within a predetermined time after the communication monitoring unit 114 detects the predetermined communication state and the own device moves. If not, the data in the content storage unit 133 is made undecipherable. Thereby, even if the user moves the electronic paper terminal 100 when there is no connection with the pairing terminal 200, the user immediately establishes a connection between the electronic paper terminal 100 and the pairing terminal 200. It is possible to prevent access to the content data from being disabled.

In the fourth embodiment, the deciphering disabler 115 detects a predetermined communication state when the communication monitoring unit 114 detects a predetermined communication state, and when the predetermined communication state is not detected within a predetermined time after the device has moved. Although the data in the content storage unit 133 cannot be decrypted, the embodiment of the present invention is not limited to this. For example, when determining whether or not to perform the decryption disabled depending on the presence or absence of an operation as in the first embodiment, the decryption disabled unit 115 detects that the communication monitoring unit 114 detects a predetermined communication state and When a predetermined communication state is not detected within a predetermined time after the operation of, the data in the content storage unit 133 may be disabled.

<< Fifth Embodiment >>
Hereinafter, the fifth embodiment will be described in detail with reference to the drawings.
FIG. 7 is a schematic block diagram showing a configuration of an information management system according to the fifth embodiment.
The information management system 1 according to the first to fourth embodiments includes one pairing terminal 200. In this case, the user must always have the pairing terminal 200. Furthermore, the user needs to use the electronic paper terminal 100 so that communication with the pairing terminal 200 is not disconnected at all times. Therefore, the information management system 1 according to the fifth embodiment includes a plurality of pairing terminals 200 and does not erase the content data stored in the content storage unit 133 if any one of the pairing terminals 200 is established. . Some of the plurality of pairing terminals 200 are fixedly provided in a company having the information management system 1.

An operation of the electronic paper terminal 100 according to the present embodiment will be described.
FIG. 8 is a flowchart showing the operation of the electronic paper terminal according to the fifth embodiment.
The communication monitoring unit 114 of the electronic paper terminal 100 causes the communication device 170 to search for the pairing terminal 200 (step S81). The communication monitoring unit 114 determines whether or not at least one of the plurality of pairing terminals 200 has been recognized by the search (step S82). When the communication monitoring unit 114 recognizes at least one of the plurality of pairing terminals 200 (step S82: YES), the display control unit 113 displays a lock release screen on the display device 150 (step S83). Then, the CPU 110 operates the electronic paper terminal 100 in the normal operation mode (Step S84).

While the CPU 110 is operating in the normal operation mode, the communication monitoring unit 114 determines whether or not communication with at least one of the plurality of pairing terminals 200 is continued (step S85). When communication with at least one of the plurality of pairing terminals 200 is continued (step S85: YES), the process returns to step S84, and the CPU 110 continues the operation in the normal operation mode. On the other hand, when communication with all of the plurality of pairing terminals 200 is disconnected (step S85: NO), the communication monitoring unit 114 causes the communication device 170 to search for the plurality of pairing terminals 200 again (step S86). The communication monitoring unit 114 determines whether or not at least one of the plurality of pairing terminals 200 has been recognized by the search (step S87).
When the communication monitoring unit 114 recognizes at least one of the plurality of pairing terminals 200 (step S87: YES), the process returns to step S84, and the CPU 110 continues the operation in the normal operation mode.

If the communication monitoring unit 114 cannot recognize the pairing terminal 200 (step S82: NO, step S87: NO), the display control unit 113 displays a predetermined lock screen on the display device 150 (step S88). Next, the input unit 111 determines whether there is an input to the input device 160 (step S89). If it is determined that there is no input to the input device 160 (step S89: NO), the electronic paper terminal 100 returns to step S81 and starts searching for the pairing terminal 200. On the other hand, when it is determined that there is an input to the input device 160 (step S89: YES), the decryption disabler 115 deletes all the content data stored in the content storage 133 (step S90).

Thus, according to the fifth embodiment, the electronic paper terminal 100 stores content stored in the content storage unit 133 when communication with at least one of the plurality of pairing terminals 200 is established. Do not erase the data. Since some pairing terminals 200 are provided in the company, the user may use the electronic paper terminal 100 without worrying about disconnection of communication with the pairing terminal 200 when in the company. it can.

The electronic paper terminal 100 according to the fifth embodiment does not erase the content data when communication with at least one of the plurality of pairing terminals 200 is established, but the embodiment of the present invention is not limited thereto. Not limited. For example, when the electronic paper terminal 100 according to another embodiment has established communication with a predetermined number (for example, two, three, etc.) or more of the pairing terminals 200 among the plurality of pairing terminals 200. The content data need not be erased. In this case, when the number of pairing terminals 200 with which communication is established is less than the predetermined number, when the electronic paper terminal 100 is operated or moved, the electronic paper terminal 100 erases the content data. In another embodiment, in the electronic paper terminal 100, the number of pairing terminals 200 with which communication is established among the plurality of pairing terminals 200 is less than a first predetermined number (for example, two). In this case, the display of the display device 150 may be a lock screen, and the content data may be deleted when the number of the pairing terminals 200 is less than a second predetermined number (for example, one).

Although several embodiments have been described in detail above with reference to the drawings, the specific configuration is not limited to the above-described configuration, and various design changes and the like can be made.
For example, in the embodiment described above, a case has been described in which a logical erasing method by writing to the auxiliary storage device 130 is used as a method of erasing content by the deciphering disabler 115. However, the embodiment of the present invention is not limited to this. For example, in other embodiments, the decryption disabler 115 may erase the content by physically destroying the auxiliary storage device 130. For example, the deciphering disabler 115 can physically destroy the auxiliary storage device 130 by driving an actuator (not shown) for bending the auxiliary storage device 130. Further, for example, the deciphering disabler 115 can physically destroy the auxiliary storage device 130 by flowing an overcurrent through the auxiliary storage device 130. In another embodiment, the decryption disabler 115 may encrypt the content data in the auxiliary storage device 130 as the decryption disabled. The encryption key used for encryption is recorded in the auxiliary storage device 130 by, for example, a host device (not shown) that records content data in the electronic paper terminal 100, and the electronic paper terminal 100 stores the encryption key from the auxiliary storage device 130 after encryption. Delete the encryption key. As a result, the electronic paper terminal 100 can decrypt the content data by the host device while making it difficult to decrypt the content data by analysis of the auxiliary storage device 130.

In the above-described embodiment, the electronic paper terminal 100 has been described as an example of the information terminal. However, the embodiment of the present invention is not limited to this. For example, an information terminal according to another embodiment may be a terminal that displays data on a liquid crystal display device (LCD). An information terminal according to another embodiment may be a storage device that does not include the display device 150.

In the above-described embodiment, the electronic paper terminal 100 operates in the normal operation mode immediately after the unlock screen is displayed. However, the embodiment of the present invention is not limited to this. For example, the electronic paper terminal 100 according to another embodiment may allow the user to input a password as user authentication after displaying the unlock screen, and operate in the normal operation mode after authentication using the password. The user authentication method is not limited to password input, and biometric authentication, property authentication, or other authentication methods may be used.

In the embodiment described above, the communication monitoring unit 114 detects the communication state with the pairing terminal 200. However, the embodiment of the present invention is not limited to this. For example, the communication monitoring unit 114 may detect a communication state with a communication device that is not registered for pairing.

<Basic configuration>
FIG. 9 is a schematic block diagram showing the basic configuration of the information management system.
In the above-described embodiment, the configuration illustrated in FIGS. 1, 4, and 7 has been described as an embodiment of the information management system 1. The basic configuration of the information management system 1 is as shown in FIG.
That is, the basic configuration of the information management system 1 includes the information terminal 900 and the communication device 1000.
The information terminal 900 is stored in the storage unit 901 when the communication monitoring unit 114 that detects a communication state between the information terminal 900 and the communication device 1000 and the communication monitoring unit 114 detects a predetermined communication state. A decryption disabler 115 that disables the decryption of the content data (data). The electronic paper terminal 100 according to the above-described embodiment is an example of the information terminal 900. The content storage unit 133 according to the above-described embodiment is an example of the storage unit 901. The pairing terminal 200 according to the above-described embodiment is an example of the communication device 1000.
As a result, the information terminal 900 can prevent access to data by a third party when there is a possibility that the information terminal 900 may be operated by the third party. Therefore, according to the present embodiment, it is possible to prevent data from being read from the storage unit 901 even if the information terminal 900 is obtained by a third party.

In at least one embodiment, the auxiliary storage device 130 is an example of a tangible medium that is not temporary. Other examples of the non-temporary tangible medium include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected through the interface 140. When this program is distributed to a computer via a communication line, the computer that has received the distribution may develop the program in a main storage device and execute the above processing.

The above program may be a program for realizing a part of the functions described above.
The above program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 130.

This application claims priority based on Japanese Patent Application No. 2015-059001 filed on Mar. 23, 2015, the entire disclosure of which is incorporated herein.

The present invention may be applied to an information terminal, an information management system, a deciphering method, and a program.

DESCRIPTION OF SYMBOLS 1 Information management system 100 Electronic paper terminal 200 Pairing terminal 133 Content memory | storage part 111 Input part 113 Display control part 114 Communication monitoring part 115 Decryption | imprint impossible part

Claims

An information terminal,
A communication monitoring unit for detecting a communication state between the information terminal and the communication device;
An information terminal comprising: a decryption disable unit that disables decoding of data stored in a storage unit when the detected communication state is a predetermined communication state.
The information according to claim 1, wherein the decryption disabler disables the decryption of the data when the detected communication state is the predetermined communication state and the information terminal is operated or moved. Terminal.
The information terminal according to claim 1, further comprising: a display control unit configured to display a predetermined screen on the display unit that displays the data before the data can be decoded.
The display control unit displays the predetermined screen on the display unit when the detected communication state is the predetermined communication state,
The information according to claim 3, wherein the decryption disabler disables decryption of the data when the detected communication state is the predetermined communication state and the information terminal is operated or moved. Terminal.
The decryption disabler disables decryption of the data when the detected communication state is the predetermined communication state and the information terminal is operated or moved a predetermined number of times or more. The information terminal according to claim 4.
The decryption disable unit communicates with the information terminal until a predetermined time elapses from the time when the detected communication state is the predetermined communication state and the operation or movement of the information terminal is started. The information terminal according to claim 2 or 4, wherein the data cannot be decoded when communication with the apparatus is not restored.
The information terminal according to any one of claims 1 to 6, wherein disabling the decoding of the data includes erasing the data.
The information terminal according to any one of claims 1 to 6, wherein disabling the decoding of the data includes encrypting the data.
The information terminal according to any one of claims 1 to 8, wherein the predetermined communication state includes a state in which connection between the information terminal and the communication device is not established.
The information terminal according to any one of claims 1 to 8, wherein the predetermined communication state includes that a radio wave intensity related to communication between the information terminal and the communication device is less than a predetermined value.
The communication device includes a plurality of communication devices including a predetermined number or more of communication devices,
The communication monitoring unit detects a communication state between the plurality of communication devices and the information terminal,
11. The decryption disabler disables decryption of the data when a connection state between the predetermined number of communication devices and the information terminal is the predetermined communication state. 11. The information terminal according to claim 1.
The information terminal according to any one of claims 1 to 11, wherein the communication device is a pairing terminal registered for pairing with the information terminal.
The information terminal according to any one of claims 1 to 12,
An information management system comprising the communication device.
A deciphering method for an information terminal,
Detecting a communication state between the information terminal and the communication device;
A deciphering disablement method comprising: deciphering data stored in a storage unit when the detected communication state is a predetermined communication state.
On the computer,
Detecting a communication state between the computer and the communication device;
A program for executing execution of disabling decoding of data stored in a storage unit when the detected communication state is a predetermined communication state.