JP7119692B2 - Display controller and program - Google Patents

Description

The present invention relates to a display control device and a program that perform display control of an information processing device.

In recent years, telework has become popular as a flexible way of working that is not bound by place or time. When a teleworker uses a PC in an open space such as a cafe, there is a possibility that the PC screen will be peeped by others. Highly confidential information may be displayed on the screen of the PC, and there is a risk of information leakage when using the PC in such an environment. Patent Documents 1 and 2 are technical documents dealing with such security risks.

In Patent Literature 1, a browsing authority level is set by combining a device attribute such as a head-mounted display (HMD) or a two-dimensional display and a user attribute based on authentication information, and an information image to be displayed is displayed according to the browsing authority level. Generate. As a result, the confidential information is displayed in an environment where only authorized individuals can view the head-mounted display (HMD) or the like, and otherwise the confidential information is not displayed.

In Patent Document 2, "anonymization release level set for a mobile terminal", "anonymization level", and "encryption information" are transmitted to a mobile terminal, the anonymization cancellation level and the anonymization level are compared, and the anonymization cancellation level is determined. When the value is high, the information is displayed on the terminal without applying the concealment effect.

Japanese Patent Application Laid-Open No. 2008-299760 JP 2015-191487 A

SUMMARY OF THE INVENTION The present invention provides a technique for preventing contents including confidential information from being peeped by others.

A display control device according to claim 1 has a control unit that causes a display unit to display content including confidential information in accordance with a display method determined based on the size of the display area.
A display control apparatus according to claim 2 is the display control apparatus according to claim 1, wherein the content to be displayed includes a plurality of pieces of confidential information, and the size and the display method are set for each of the plurality of pieces of confidential information. relationship is defined.
A display control device according to claim 3 is the display control device according to claim 1, wherein the size is the physical size of the screen of the display unit.
A display control device according to claim 4 is the display control device according to claim 1, in which the display unit is separate from the display control device, and the display control device displays information about the size of the display unit. When it cannot be obtained, the control unit displays the confidential information according to a predetermined display method.
A display control device according to claim 5 is the display control device according to claim 1, wherein the size is the size of a window for displaying the content on the display unit.
In the display control device according to claim 6, in the display control device according to claim 5, when there is an instruction to continuously change the size of the window, dynamically according to the size of the window being changed Change the display method of the confidential information.
A display control device according to claim 7 is the display control device according to any one of claims 1 to 6, wherein the content is a document, and the size of characters when displaying the document on the display unit is Based on this, the display method is determined.
A display control device according to claim 8 is the display control device according to any one of claims 1 to 7, wherein the display unit supports display of a plurality of types of content, and for each of the plurality of types, A relationship between the size and the display method is defined.
A program according to claim 9 causes a computer controlling a display unit to display content including confidential information on the display unit according to a display method determined based on the size of the display area.

According to the display control device of claim 1, it is possible to prevent the contents including the confidential information from being peeped by the surroundings.
According to the display control device of claim 2, the display method can be determined for each confidential information.
According to the display control device of claim 3, the display method can be determined according to the physical size of the display unit.
According to the display control unit of claim 4, it is possible to cope with a configuration in which the display control device cannot acquire information about the size of the display unit.
According to the display control unit of claim 5, the display method can be determined according to the size of the window.
According to the display control device of claim 6, when the window size is dynamically changed, the display method is dynamically changed accordingly.
According to the display control device of claim 7, the display method can be determined according to the character size.
According to the display control device according to claim 8, it is possible to cope with the display of a plurality of types of contents.
According to the program of claim 9, it is possible to prevent the content including the confidential information from being peeped by the surroundings.

1 is a block diagram showing the configuration of an information processing apparatus 100 according to one embodiment; FIG. 2 is a diagram illustrating a software configuration of the information processing apparatus 100; FIG. 4 is a block diagram showing the functional configuration of a plug-in 113; FIG. 4 is a flowchart illustrating the operation of the plug-in 113; FIG. 11 is a block diagram showing the functional configuration of a plug-in according to the second embodiment; FIG. FIG. 11 is a block diagram showing the functional configuration of a plug-in according to the third embodiment; FIG. FIG. 12 is a block diagram showing the functional configuration of a plug-in according to the fourth embodiment; FIG. FIG. 12 is a block diagram showing the functional configuration of a plug-in according to the fifth embodiment; FIG. FIG. 4 is a diagram exemplifying a situation around the information processing apparatus;

1. First Embodiment FIG. 1 is a block diagram showing the configuration of an information processing apparatus 100 according to one embodiment of the present invention. The information processing device 100 is a computer device having a processor 101 , a main memory device 102 , an auxiliary memory device 103 , a communication section 104 , an operation section 105 , a display section 106 and an I/O device group 107 . The information processing apparatus 100 is, for example, a tablet terminal, a smartphone, or a notebook PC (Personal Computer) in which the display unit 106 and the main body (other hardware elements) are integrated. Alternatively, the information processing apparatus 100 may be a desktop PC in which the display unit 106 and the main body are separate bodies. The processor 101 performs various types of processing and calculations. The main storage device 102 is a storage device that functions as a work area when the processor 101 executes programs, and includes, for example, RAM (Random Access Memory) and ROM (Read Only Memory). The auxiliary storage device 103 is a storage device that stores various data and programs. A communication unit 104 is a device for performing communication via the Internet or a LAN. The operation unit 105 is an input device for inputting instructions or information, and includes, for example, a touch screen, keyboard, or mouse. A display unit 106 is a device for displaying information, and includes, for example, a liquid crystal display. The I/O device group 107 is a device group for performing input/output, and includes, for example, a camera and a microphone.

FIG. 2 is a diagram illustrating a software configuration of the information processing apparatus 100. As illustrated in FIG. The auxiliary storage device 103 stores an OS (Operating System) 111 , application software 112 such as document creation software and tabulation software, and plug-ins 113 plugged into the application software 112 . A plug-in 113 is a program that extends the function of the application software 112 .

In general, as the size of the display area of the display unit 106 increases, it becomes easier for a third person other than the user of the information processing apparatus to peek at the display contents of the display area. Therefore, the plug-in 113 peeks at the display size information 115 indicating the size of the display area of the display unit 106 connected to the processor 101 (the size in this embodiment is the physical size of the display panel in the display device). The degree of ease is obtained from the OS 111 via the application software 112 . Based on the display size information 115, the plug-in 113 controls the display method when displaying the confidential information included in the display target information on the display unit 106. FIG.

FIG. 3 is a block diagram showing the functional configuration of the plug-in 113. As shown in FIG. Display target information 120 handled by application software 112 in FIG. 2 includes a plurality of confidential information 121 . These confidential information 121 differ from each other in degree of confidentiality. The degree of secrecy is, for example, the degree of damage caused by a third party's peeping. Each piece of confidential information 121 includes a threshold 122 set according to the degree of confidentiality. This threshold value 122 is the lower limit value (an example of the definition of the relationship between the size and the display method) of the display size information for performing the confidentiality processing in displaying the confidential information 121, and is, for example, 7 inches.

The plug-in 113 in FIG. 2 activates the display processing unit 130 and the display control unit 140 when the application software 112 receives a display instruction for certain confidential information 121 from the OS 111 . Then, the display processing unit 130 displays the confidential information 121 for which display is instructed on the display unit 106, and the display control unit 140 sets the display method in the display processing unit 130 between the display size information 115 and the confidential information 121. Control is performed based on the threshold value 122 .

Specifically, when the display size information 115 is less than the threshold value 122, the display control unit 140 does not cause the display processing unit 130 to perform the concealment process, and when the display size information 115 is the threshold value 122 or more, , causes the display processing unit 130 to perform an encryption process. Anonymization processing is, for example, processing of masking display contents, reducing displayed characters, and reducing display brightness. This concealment processing may be performed on only the confidential information 121 instructed to be displayed, or may be performed on the entire screen including background information displayed together with the confidential information 121 .

FIG. 4 is a flow chart illustrating the operation of the plug-in 113. As shown in FIG. In step S<b>1 , the display control unit 140 acquires the display target information 120 . The display target information 120 includes at least one set of confidential information 121 and threshold 122 . In step S<b>2 , the display control unit 140 determines whether the size indicated by the display size information 115 is larger than the threshold 122 for each piece of display target information 120 . When it is determined that the size of the display area is larger than the threshold 122 (S2: YES), the display control unit 140 shifts the process to step S3. When it is determined that the size of the display area is smaller than the threshold value 122 (S2: NO), the display control unit shifts the process to step S4.

In step S<b>3 , the display processing unit 130 subjects the portion of the display target information including at least the confidential information 121 to the confidentiality processing.

In step S4, the display unit 106 displays the display target information.

As described above, according to the present embodiment, content including confidential information is displayed on the display unit 106 according to the display method determined based on the size of the display area. It is possible to reduce the possibility of the content including confidential information being peeped.

2. Second Embodiment FIG. 5 is a block diagram showing the functional configuration of a plug-in according to the second embodiment. The ease of peeping increases as the size of the window in which the confidential information 121 is displayed (this is the software size) increases. Therefore, in this embodiment, the plug-in acquires window size information 116 indicating the size of the window in which the confidential information 121 is displayed on the display unit 106 from the OS 111 via the application software 112 .

In this embodiment, the threshold value 122 included in the confidential information 121 is the lower limit value of the window size information 116 for performing confidentiality processing when displaying the confidential information 121 . When the display processing unit 130 of the plug-in executes the display processing for the confidential information 121, the display control unit 141, if the window size information 116 is less than the threshold 122 included in the confidential information 121, displays If the window size information 116 is greater than or equal to the threshold value 122 included in the confidential information 121, the display processing unit 130 is caused to perform the confidential processing.

Also in this embodiment, the same effects as those of the first embodiment can be obtained. Further, according to the present embodiment, whether or not to perform the confidentiality processing is switched based on the window size information 116. Therefore, when the confidentiality processing is required, that is, when the confidential information 121 is displayed in a large window, Confidentiality processing can be executed only for

3. Third Embodiment FIG. 6 is a block diagram showing the functional configuration of a plug-in according to the third embodiment. In this embodiment, the confidential information 121 is a document file. When the confidential information 121 is a document file, the ease of peeping of the confidential information 121 displayed on the display unit 106 depends on the size of each character of the confidential information 121 displayed on the display unit 106. As the character size increases, the ease of peeping increases.

Therefore, in this embodiment, the confidential information 121 includes a threshold value 122 and character size information 123 . Here, the character size information 123 is information indicating the character size (for example, font size) of each character used in the confidential information 121 . A threshold value 122 is the lower limit of the display character size for concealment processing when each character is displayed on the display unit 106 . When the display processing unit 130 of the plug-in executes display processing for the confidential information 121, the display control unit 142 causes the display character size calculation unit 142a to match the display size information 115 or the window size information 116 with the confidential information 121. The display character size on the display unit 106 is calculated based on the included character size information 123 . Then, if the display character size is less than the threshold 122 included in the confidential information 121, the display control unit 142 does not cause the display processing unit 130 to perform the confidentiality process, and the display character size is changed to the confidential information 121. If it is equal to or greater than the included threshold 122, the display processing unit 130 is made to perform the concealment process.

Also in this embodiment, the same effects as those of the first embodiment can be obtained. Further, according to the present embodiment, since whether or not to perform the ciphering process is switched based on the display character size, the ciphering process is performed only when the ciphering process is required, that is, when the characters are displayed in a large size. can be executed.

4. Fourth Embodiment FIG. 7 is a block diagram showing the functional configuration of a plug-in according to a fourth embodiment. In this embodiment, the confidential information 121 included in the display target information 120 may be a document file or an image file. Here, even if the size of the display area and the size of the window are the same, the confidential information 121 has different degrees of ease of peeping depending on whether it is a document file or an image file. Therefore, switching whether or not to perform the concealment process only by comparing the display size information 115 and the window size information 116 with a threshold without considering the type of the confidential information 121 results in an unrealistic result. can be.

Therefore, in the present embodiment, the display control unit 143 determines the type of the confidential information 121 by the type determination unit 143a, and compares the threshold determined according to the type with the display size information 115 or the window size information 116. Based on the result of the comparison, switching control is performed as to whether or not the display processing unit 130 performs the concealment processing. Specifically, image files are generally easier to peek than document files. Used for comparison.

Also in this embodiment, the same effects as those of the first embodiment can be obtained. Further, according to the present embodiment, whether or not to perform the confidentiality processing is switched according to the type of the confidential information to be displayed, so that the confidentiality processing is executed in an appropriate manner according to the type of the confidential information. be able to. In the above description, document files and image files are used as examples, but the present embodiment can also be applied to three or more types of confidential information.

5. Fifth Embodiment FIG. 8 is a block diagram showing the functional configuration of a plug-in according to a fifth embodiment. The ease of peeping may be influenced by the display size and window size of the display unit of the information processing device, as well as the circumstances around the information processing device. In the present embodiment, consideration is given to such surrounding circumstances when determining whether or not to perform the confidentiality process.

FIG. 9 is a diagram exemplifying the situation around the information processing apparatus. In this example, a user 400 is sitting in front of the display area 300 of the information processing device. Peepable ranges 401L and 401R are present on both left and right sides of the user 400 when viewed from the display area 300 of the information processing apparatus. In this embodiment, a camera 301 installed in the center of a display area 300 captures an image of the user 400 and its peripheral area. This imaging range preferably includes the peeping ranges 401L and 401R.

As shown in FIG. 9, the display control unit 144 in this embodiment includes a peeping ease calculation unit 144a and a peeping possibility determination unit 144b. Here, the peeping ease degree calculation unit 144a determines whether or not the image information output from the camera 301 includes an image that looks like the face of a person other than the user 400 in the peeping ranges 401L and 401R. When an image that looks like a human face is included, the area of the face is obtained, and the first peeping ease degree D1 is calculated based on the result. Specifically, if an image that looks like a human face is not included, the first peeping ease degree D1 is set to the minimum value, and if an image that looks like a human face is included, the first degree of peeping ease is set according to the area of the face. 1 is increased. The reason why the first peeping ease degree D1 is increased according to the area of the face is that the larger the area of the face, the closer the face is to the camera 301 and the easier it is to peek at the display area. is. The peeping ease degree calculation unit 144a multiplies the first peeping ease degree D1 by a second peeping ease degree D2 that increases as the display size information 115 or the window size information 116 increases. A peek ease degree D3 is calculated.

The threshold value 122 included in the confidential information 121 in this embodiment is the lower limit value of the peeping ease degree D3 that causes the display processing unit 130 to perform confidential processing. The display control unit 144 causes the peeping possibility determining unit 144b to compare the peeping ease degree D3 calculated by the peeping ease degree calculating unit 144a with the threshold value 122 included in the confidential information 121, and determines the peeping ease degree D3. is less than the threshold value 122, the display processing unit 130 does not perform the concealment processing, and when the peeping ease degree D3 is the threshold value 122 or more, the display processing unit 130 is caused to perform the concealment processing.

As described above, according to the present embodiment, it is possible to control whether or not to perform the confidentiality processing by considering not only the display size and window size but also the circumstances around the information processing apparatus.

In the above description, it is assumed that the range captured by the camera includes the peeping ranges 401L and 401R. It can also be applied to cases in which a part of the peeping range 401L is included. In this case, for example, it is conceivable to switch the peeping easiness degree D3 between two levels depending on whether or not there is an image that looks like the face of a person other than the user 400 in the peeping range 401L or 401R.

6. Modifications The present invention is not limited to the above-described embodiments, and various implementations are possible. Some modifications will be described below. Two or more of the following modifications may be used in combination.

(1) When the display unit is separate from the display control device and cannot acquire the display size information and the window size information, the display control device masks the confidential information, for example. The confidential information may be displayed according to the display method.

(2) For example, in the second embodiment described above, when the window size is changed continuously by dragging with a mouse, for example, when the window size is gradually increased, the display control unit 141 controls the window size information 116 at that time. The display method may be switched dynamically by For example, as the window size information 116 gradually increases, the brightness of the display is reduced, or the displayed characters are reduced, and when the window size information 116 exceeds a certain upper limit, the confidential information is masked. Aspects are conceivable.

(3) In each of the above-described embodiments, the confidential information 121 includes the threshold 122 , but the display target information 120 may include the common threshold 122 for all confidential information 121 . Further, the display target information 120 may include a threshold value 122 set according to the type of confidential information 121 such as a document file and an image file. Alternatively, these thresholds 122 may be incorporated into plug-ins 113 .

(4) In each of the above-described embodiments, the display size information 115 and the window size information 116 are compared with the threshold value 122 to switch whether or not to perform the encryption process. The degree of concealment in the concealment process may be controlled according to the difference from the threshold value 122 . Alternatively, the degree of concealment in the concealment process may be controlled according to the display size information 115 and the window size information 116 without comparison with the threshold value 122 .

(5) The program according to the present embodiment may be provided as independent software rather than as a plug-in for existing application software. Further, the program according to the present embodiment does not support display of a single type of content (content) such as a document file or an image file, but may support display of a plurality of types of content. In this case, the threshold may be defined for each content type.

DESCRIPTION OF SYMBOLS 101... Processor, 102... Main storage device, 103... Auxiliary storage device, 104... Communication part, 105... Operation part, 106... Display part, 111... OS, 112... Application software, 113... Plug-in, 120... Display target information , 121... Confidential information, 122... Threshold, 130... Display processing unit, 140, 141, 142, 143, 144... Display control unit, 115... Display size information, 116... Window size information, 142a... Display character size calculation unit , 123...Character size information, 143a...Type determination unit, 144a...Peeping ease degree calculation unit, 144b...Peeping possibility determination unit.

Claims (6)

A display control device having a control unit for displaying content including confidential information on a display unit according to a display method determined based on the size of a display area,
The size is the physical size of the screen in the display unit,
In the case where the display unit is separate from the display control device and the display control device cannot acquire information about the size of the display unit, the control unit controls the confidential display according to a predetermined display method. display information
Display controller. The display method includes a display method determined based on a threshold set according to the degree of confidentiality of the confidential information.
The display control device according to claim 1. the content to be displayed includes a plurality of confidential information,
The display control device according to any one of claims 1 and 2 , wherein a relationship between the size and the display method is defined for each of the plurality of confidential information. the content is a document;
4. The display control device according to any one of claims 1 to 3 , wherein the display method is determined based on the size of characters when the document is displayed on the display unit. The display unit supports display of multiple types of content,
The display control device according to any one of claims 1 to 4 , wherein a relationship between the size and the display method is defined for each of the plurality of types. computer that controls the display
A program for executing a step of displaying content including confidential information on the display unit according to a display method determined based on the size of the display area,
The size is the physical size of the screen in the display unit,
When the display unit is separate from the computer and the computer cannot acquire information about the size of the display unit, the displaying step displays the confidential information according to a predetermined display method. let
program.

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