KR20220014670A - Method for digital document security and computing system performing the same - Google Patents

Abstract

Disclosed are a method for enhancing security of a digital document on the basis of an image captured through a front camera installed in a computing system and a computing system executing the same. According to one aspect of the present invention, a digital document security method executed in a computing system including a display device and a front camera comprises the following steps: displaying, by the computing system, a digital document on the display device in response to a request for reading the digital document; and detecting, by the computing system, a photographing device capable of photographing a screen displayed on the display device on the basis of the image photographed through the front camera. The step of displaying the digital document on the display device comprises: a step of displaying, by the computing system, the digital document on the display device in a readable form when the photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display device; and a step of controlling, by the computing system, to output the digital document in an unreadable form to the display device or to prevent the digital document from being output to the display device when a photographing device is detected from the image photographed through the front camera while the digital document is displayed on the display device.

Description

Method for digital document security and computing system performing the same}

The present invention relates to a digital document security method and a computing system for performing the same, and more particularly, to a method for enhancing security of a digital document based on an image captured by a front camera installed in the computing system, and a computing system performing the same. it's about

In the case of digital documents, unlike printed documents, various attempts have been made to increase security due to the characteristics of easy duplication. For example, a technology that allows only those with specific rights to copy and transmit, a technology for outputting a watermark when outputting a digital document, a technology for preventing unauthorized screen capture, and the like have been developed. However, despite these attempts to strengthen the security of digital documents, it was not possible to prevent the contents of digital documents displayed on the screen from being photographed and leaked without permission.

An object of the present invention is to provide a method capable of further improving the security of a digital document by preventing unauthorized photographing of the digital document.

According to an aspect of the present invention, there is provided a digital document security method performed in a computing system having a display device and a front camera, wherein the computing system displays the digital document on the display device in response to a request to read the digital document. to do; and detecting, by the computing system, a photographing apparatus capable of photographing a screen displayed on the display apparatus based on the image photographed through the front camera, wherein the digital document is displayed on the display apparatus In the case where a photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display apparatus, the computing system displays the digital document on the display apparatus in a viewable form; ; and when a photographing device is detected from an image photographed through the front camera while the digital document is displayed on the display apparatus, the computing system outputs the digital document to the display apparatus in an unreadable form or the digital document is There is provided a digital document security method comprising the step of controlling not to be output to the display device.

In one embodiment, the document security method further comprises the step of determining, by the computing system, whether the front camera exists and whether the front camera is operating normally, wherein the step of displaying the digital document on the display device comprises: The method may further include displaying the digital document on the display device when the front camera exists and operates normally.

In one embodiment, the document security method, the computing system, based on the image captured through the front camera, further comprising the step of detecting a person's face, displaying the digital document on the display device The step may further include displaying the digital document on the display device when the face of the person detected based on the image captured by the front camera is the face of the user authenticated in advance.

In one embodiment, the document security method further comprises, by the computing system, detecting a person's face based on the image captured by the front camera, wherein the digital document is displayed on the display device. When the photographing device is not detected in the image photographed through the front camera during the operation, the step of displaying, by the computing system, the digital document on the display device in a readable form, the digital document is displayed on the display device In the case where the photographing device is not detected in the image photographed through the front camera during It may include the step of displaying the form on the display device.

In one embodiment, the step of displaying the digital document on the display device may include: while the digital document is displayed on the display device, the face of a person detected based on the image captured by the front camera is the previously authenticated The method may further include, when it is not the user's face, controlling, by the computing system, to output the digital document to the display device in an unreadable form or to prevent the digital document from being output to the display device.

According to another aspect of the present invention, there is provided a computer program installed in a data processing apparatus and recorded in a medium for performing the above-described method.

According to another aspect of the present invention, there is provided a computer-readable recording medium in which a computer program for performing the above-described method is recorded.

According to another aspect of the present invention, there is provided a computing system, comprising: a display device; front camera; There is provided a computing system comprising a processor and a memory, wherein the memory, when executed by the processor, causes the computing system to perform the method described above.

According to another aspect of the present invention, there is provided a computing system having a display device and a front camera, comprising: a display module configured to display the digital document on the display device in response to a request to read the digital document; and a photographing device detection module configured to detect, by the computing system, a photographing device capable of photographing a screen displayed on the display device, based on the image photographed through the front camera, wherein the display module includes the digital document When the photographing device is not detected in the image photographed through the front camera while being displayed on the display device, the digital document is displayed on the display device in a readable form, and the digital document is displayed on the display device When a photographing device is detected in the image photographed through the front camera during the process, the digital document is output to the display device in an unreadable form, or a computing system for controlling not to output the digital document to the display device is provided.

In an embodiment, the computing system further includes a determination module for determining whether the front camera exists and whether it operates normally, wherein the display module includes the digital display module when the front camera exists and operates normally. A computing system for displaying a document on the display device is provided.

In one embodiment, the computing system, based on the image captured by the front camera, further comprising a face detection module for detecting a person's face, wherein the display module, the image taken through the front camera When the face of the person detected based on the face is the face of the user authenticated in advance, the digital document may be displayed on the display device.

In an embodiment, the computing system further comprises a face detection module for detecting a person's face based on the image captured by the front camera, wherein the display module displays the digital document on the display device. In the case where the photographing device is not detected in the image photographed through the front camera during form may be displayed on the display device.

In an embodiment, the display module is configured to: When the face of a person detected based on the image captured by the front camera while the digital document is displayed on the display device is not the face of the previously authenticated user, the The digital document may be output to the display device in an unreadable form, or the digital document may be controlled not to be output to the display device.

The computing system 100 according to an embodiment of the present invention performs the digital document security method according to the technical idea of the present invention, so that the digital document is correctly By making it visible, the contents of the digital document can be prevented from being exposed to unauthorized users.

In addition, the computing system according to an embodiment of the present invention prevents the digital document from being displayed correctly when a person reading the document attempts to photograph the contents of the digital document using a photographing device, whereby the digital document is photographed without permission and security is compromised This has the effect of preventing problems from occurring.

In order to more fully understand the drawings cited in the Detailed Description, a brief description of each drawing is provided.
1 is a diagram illustrating a schematic configuration of a computing system according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of a driving environment of the computing system according to an embodiment of the present invention.
3 is a flowchart illustrating schematic steps of a digital document security method according to an embodiment of the present invention.
4 is a flowchart illustrating a digital document security method according to another embodiment of the present invention.
5 is a flowchart illustrating a digital document security method according to another embodiment of the present invention.
6 is a block diagram illustrating a schematic configuration of a computing system 100 according to an embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In this specification, terms such as "include" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other It should be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

In addition, in the present specification, when any one component 'transmits' data to another component, the component may directly transmit the data to the other component or through at least one other component. This means that the data may be transmitted to the other component. Conversely, when one component 'directly transmits' data to another component, it means that the data is transmitted from the component to the other component without passing through the other component.

Hereinafter, the present invention will be described in detail focusing on embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

1 is a diagram illustrating a schematic configuration of a computing system according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of a driving environment of the computing system according to an embodiment of the present invention.

The digital document security method according to the inventive concept may be performed by the computing system 100 .

The computing system 100 may be a data processing device having arithmetic capability for implementing the technical idea of the present invention, and may include a personal computer such as a laptop or a mobile terminal such as a smart phone, a mobile phone, a tablet PC, a laptop, etc. can In addition, it may include any type of computing device having a processor and memory. The computing system 100 may be implemented as any one physical device, but it is understood that a plurality of physical devices may be organically combined as needed to implement the computing system 100 according to the technical idea of the present invention. An average expert in the technical field can easily infer.

Referring to FIG. 1 , the computing system 100 may include a display device 110 , a front camera 120 , a memory 130 , and a processor 140 . According to an embodiment of the present invention, some of the above-described components may not necessarily correspond to the components essential to the implementation of the present invention, and according to the embodiment, the computing system 100 is more Of course, it may include more components. For example, the system 100 may further include a communication module capable of performing wired/wireless communication with an external device through the Internet or a network, or various input/output devices capable of performing interaction with a user.

The display device 110 is a device capable of outputting visual information, and includes a liquid crystal display (LCD), a light emitting diode display (LED), a plasma display (PDP), an organic light emitting diode display (OLED), and a surface conduction electron emission device. It may include a display (SED) and the like. In an embodiment, the display device 110 may be a touch screen further having a function of receiving a touch input.

The front camera 120 may convert an image received through a lens into a digital signal, and may be used to take a picture or a moving picture. The front camera 120 may include an image sensor such as a charge coupled device (CCD) sensor or a complementary metal oxide semi-conductor (CMOS) sensor, a lens, and an infrared filter.

The front camera 120 may be installed in the same direction as the display device 110 to photograph the front of the screen displayed by the display device 110 . For example, the front camera 120 may photograph a person looking at a screen output through the display device. The front camera 120 may be referred to as a webcam or a selfie camera in some cases.

Meanwhile, according to an embodiment, the computing device 100 may further include a rear camera in addition to the front camera.

The memory 130 may store various data and computer programs, such as data received/input from an external device and data generated by the terminal 200 . The memory 130 may include a volatile memory and a non-volatile memory. The memory 130 may include, for example, a flash memory, a ROM, a RAM, an EEROM, an EPROM, an EEPROM, a hard disk, and a register. Alternatively, the memory 130 may include a file system, a database, and an embedded database.

The processor 140 is connected to other components (eg, the display device 110 , the front camera 120 , the memory 130 , etc.) included in the computing device 100 , and functions and/or You can control resources. In addition, the processor 140 may control the computing system 100 to perform a digital document security method to be described later. The processor 140 may include a CPU, GPU, MCU, APU, microprocessor, and the like.

Meanwhile, as described above, the computing system 100 may further include a communication module according to an embodiment. In this case, the communication module performs communication with an external device and transmits and receives various signals, information, and data. can do. The communication module is a 3G module, LTE module, LTE-A module, 5G module, Wi-Fi module, WiGig module, Ultra Wide Band (UWB) module, long-distance communication module such as a LAN card, MST module, Bluetooth module, NFC module , an RFID module, a ZigBee module, a Z-Wave module, and a short-distance communication module such as an IR module.

The computing system 100 may independently perform the digital document security method according to the technical idea of the present invention, but according to an embodiment, the computing system 100 is an external server 200 as shown in FIG. 2 . The digital document security method according to the technical idea of the present invention may be performed together with the server 200 while being connected through a wired/wireless network and transmitting and receiving various signals, data, and information. In this case, some of the functions or detailed steps described as being performed by the computing system 100 may be performed by the server 200 .

3 is a flowchart illustrating schematic steps of a digital document security method according to an embodiment of the present invention.

Referring to FIG. 3 , the computing system 100 may receive a request to read a digital document ( S100 ).

A digital document may mean a document in a form that can be stored or transmitted in electronic form, and may be stored electronically in a hard disk drive (HDD), solid state drive (SSD), or volatile memory (eg, RAM). It may be in the form of an existing file. For example, the digital document may be in Microsoft Word or PDF format, but is not limited thereto, and may refer to digital information that can be identified or distinguished by a human or a machine. For example, the digital document may be configured in various image formats such as JPG, BMP, and TIFF.

In one embodiment, the user selects an indicator (eg, an icon of a corresponding file, a file item, a shortcut icon, etc.) of a digital document presented by the computing system 100 to view the corresponding digital document by the computing system ( 100), and the computing system 100 may receive such a request.

When the computing system 100 receives a request to read the digital document, the computing system 100 may determine whether the front camera 120 exists and/or whether it operates normally (S110).

In an embodiment, the computing system 100 is a command provided by an operating system installed in the computing system 100 to determine whether the front camera 120 exists and/or whether the front camera 120 operates normally. , API (Application Programming Interface), system call, etc. can be used. For example, the computing system 100 calls a system call that can check the status of the front camera 120 and checks a return value thereof to determine whether the front camera 120 exists and/or the front camera 120 . ) to check whether it is operating normally.

In another embodiment, the computing system 100 may determine whether the front camera 120 is operating normally based on the image captured by the front camera 120 . For example, the computing system 100 may analyze the image captured by the front camera 120 to recognize the face of any person or the face of a pre-authenticated user, When the user's face is recognized, it may be determined that the front camera 120 operates normally. For example, the computing system extracts key points for major parts of the face, such as eyes, nose, ears, and mouth, from each image frame captured by the front camera 120 By comparing, it is possible to recognize the face of a pre-authenticated user.

In addition, the computing system 100 may determine whether the front camera 120 exists and/or whether the front camera 120 normally operates using various known methods.

Meanwhile, when it is determined that the front camera 120 does not exist or does not operate normally, the computing system 100 may end the reading request without displaying the digital document (S120, S130).

When it is determined that the front camera 120 exists and operates normally, the computing system 100 is capable of capturing a screen displayed on the display device 110 based on an image captured by the front camera 120 . A device may be detected (S140). For example, the computing system 120 may detect a camera, a smartphone/tablet PC equipped with a camera, and a mechanical device equipped with a lens.

The computing system 100 may use a pre-trained neural network to detect a photographing device from an image. For example, the computing system 100 may mount a neural network learned in advance by using a large number of images captured by various photographing devices as learning data, and using this, photographing through the front camera 120 . It is possible to detect the imaging device from the image frame. In the present specification, a neural network includes a multilayer perceptron model, and may refer to a set of information representing a series of design items defining an artificial neural network. In one embodiment, the neural network may be a convolutional neural network. As is well known, a convolutional neural network may include an input layer, a plurality of hidden layers, and an output layer. Each of the plurality of hidden layers may include a convolution layer and a pooling layer (or sub-sampling layer). The convolutional neural network may be defined by a function, filter, stride, weight factor, etc. for defining each of these layers. The design details for each layer constituting the convolutional neural network are widely known. For example, well-known functions may be used for each of the number of layers to be included in a plurality of layers, a convolution function for defining the plurality of layers, a pooling function, and an activation function, and implement the technical spirit of the present invention Separately defined functions may be used to do this.

In an embodiment, the computing system 100 may detect a changing area in a series of images captured by the front camera 120 and determine whether a photographing device is included in the changing area. have.

Also, the computing system 100 may detect a person's face based on the image captured by the front camera 120 (S150). According to an embodiment, the computing system 100 may include a neural network for face detection, and may perform face detection using the neural network.

Meanwhile, the computing system 100 outputs the digital document to the display device in an unreadable form when a photographing device is detected in the image photographed through the front camera 120 while the digital document is displayed on the display device Alternatively, the digital document may be controlled not to be output to the display device 110 (S160 and S170).

In one embodiment, the computing system 100 may prevent the user from reading the digital document by blurring the digital document, adjusting the contrast or color tone, or giving various other visual effects, and the digital document By displaying an area corresponding to , in one color (eg, black, white, etc.), it is possible to prevent the digital document from being read. Alternatively, the computing system 100 may temporarily turn off the display device 110 so that the digital document is not output to the display device 110 . Alternatively, the computing system 100 may display a predetermined warning message (eg, a warning message indicating that a device capable of capturing a document has been detected) on all or part of the area corresponding to the digital document. In addition to this, the computing system 100 outputs the digital document to the display device in an unreadable form by applying various methods that prevent the user from recognizing the contents of the digital document through the display device 110 or the digital document may be controlled not to be output to the display device 110 .

Meanwhile, the computing system 100 determines whether the face of a person detected based on the image captured through the front camera 120 while the digital document is displayed on the display device 120 is the face of a previously authenticated user. may be determined, otherwise the digital document may be output to the display device in a form that cannot be read or it may be controlled so that the digital document is not output to the display device 110 (S180, S170)

In the computing system 100 , the photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display apparatus 11 , and based on the image photographed through the front camera 120 , When the detected face is the face of a previously authenticated user, the digital document may be displayed on the display device 110 in a readable form ( S190 ). Displaying the digital document in a viewable form may mean displaying the digital document in a form in which the user can see and recognize the contents thereof.

On the other hand, the computing system 100 outputs the digital document to the display device 110 in an unreadable form or in a state in which the digital document is not output to the display device 110 , the detected photographing device disappears and authentication in advance Of course, if the user's face is recognized, the digital document can be displayed again in a readable form.

In another embodiment, the computing system 100 detects an object in the shape of a predetermined polygon (eg, a square, etc.) instead of the above-described photographing device, and whether or not to display a digital document in a viewable state according to the detection result can be decided That is, the description of the present specification related to the detection of a photographing device described above or to be described later and the display of a digital document using the same is applied as it is to this embodiment of detecting an object in the form of a predetermined polygon (eg, a square, etc.) can

Meanwhile, in some embodiments, some of the steps of FIG. 3 are not included, which will be described with reference to FIGS. 4 and 5 .

4 is a flowchart illustrating a digital document security method according to another embodiment of the present invention.

Referring to FIG. 4 , the computing system 100 may receive a request for reading a digital document ( S200 ).

Then, the computing system 100 determines whether the front camera 120 exists and/or whether the front camera 120 operates normally (S210), and says that the front camera 120 does not exist or does not operate normally. If it is determined, the reading request may be terminated without displaying the digital document (S230).

When it is determined that the front camera 120 exists and operates normally, the computing system 100 is capable of capturing a screen displayed on the display device 110 based on an image captured by the front camera 120 . A device may be detected (S240).

On the other hand, when the computing system 100 detects a photographing device in an image photographed through the front camera 120 while the digital document is displayed on the display apparatus, the digital document cannot be read by the display apparatus 110 ) or control so that the digital document is not output to the display device 110 (S250, S260).

When a photographing device is not detected in an image photographed through the front camera while the digital document is displayed on the display apparatus 11 while the digital document is displayed on the display apparatus 11, the computing system 100 may display the digital document in a form that can be read. It can be displayed in (110) (S270).

5 is a flowchart illustrating a digital document security method according to another embodiment of the present invention.

Referring to FIG. 5 , the computing system 100 may receive a request to read a digital document ( S300 ).

Then, the computing system 100 may detect a person's face based on the image captured by the front camera 120 (S310), and the person detected based on the image captured by the front camera 120 If the face of the user is not the face of the previously authenticated user, it may end without displaying the digital document requested to be read (S330).

If it is determined based on the image captured by the front camera 120 that the detected face is the face of the previously authenticated user, the computing system 100 is based on the image captured by the front camera 120 . Thus, a photographing apparatus capable of photographing a screen displayed on the display apparatus 110 may be detected (S340).

On the other hand, when the computing system 100 detects a photographing device in an image photographed through the front camera 120 while the digital document is displayed on the display apparatus, the digital document cannot be read by the display apparatus 110 ) or control so that the digital document is not output to the display device 110 (S350 and S360).

When a photographing device is not detected in an image photographed through the front camera while the digital document is displayed on the display apparatus 11 while the digital document is displayed on the display apparatus 11, the computing system 100 may display the digital document in a form that can be read. It can be displayed in (110) (S370).

The computing system 100 performs the above-described digital document security method so that the digital document can be displayed correctly only when there is a request for reading the digital document by the previously authenticated user. You can avoid revealing the contents of

In addition, the computing system 100 prevents the digital document from being photographed without permission by preventing the digital document from being displayed correctly when a person reading the document attempts to photograph the contents of the digital document using a photographing device. There is an effect that can be done.

In addition, in some embodiments, the computing system 100 prevents the digital document from being displayed correctly when the front camera detects an object that can be suspected as a photographing device, that is, an object of a predetermined polygon (eg, a square). It has the effect of more strongly preventing the problem of compromised security due to unauthorized digital document recording.

6 is a block diagram illustrating a schematic configuration of a computing system 100 according to an embodiment of the present invention.

As shown in FIG. 6 , the computing system 100 includes a display device 110 , a front camera 120 , a determination module 150 , a display module 160 , a photographing device detection module 170 , and a face detection module. (180). According to an embodiment of the present invention, some of the above-described components may not necessarily correspond to the components essential to the implementation of the present invention, and according to the embodiment, the computing system 100 is more Of course, it may include more components. For example, the system 100 controls functions and/or resources of other components of the computing system 100 (eg, the storage module 110 , the extraction module 120 , the learning module 130 , etc.) It may further include a control module (not shown) for In addition, according to an embodiment, the computing system 100 may further include a database (DB) for storing various types of information and/or data required to implement the technical idea of the present invention.

The computing system 100 may mean a logical configuration having hardware resources and/or software necessary to implement the technical idea of the present invention, and necessarily means one physical component or one I don't mean the device. That is, the computing system 100 may mean a logical combination of hardware and/or software provided to implement the technical idea of the present invention, and if necessary, installed in devices spaced apart from each other to perform each function By doing so, it may be implemented as a set of logical configurations for implementing the technical idea of the present invention. Also, the computing system 100 may refer to a set of components separately implemented for each function or role for implementing the technical idea of the present invention. For example, each of the display device 110 , the front camera 120 , the determination module 150 , the display module 160 , the photographing device detection module 170 , and the face detection module 180 is located in a different physical device. Alternatively, they may be located on the same physical device. In addition, depending on the embodiment, the combination of software and/or hardware constituting each of the determination module 150 , the display module 160 , the photographing device detection module 170 , and the face detection module 180 is also different from each other physical device Each of the modules may be implemented by organically combining components located in the . Also, in this specification, a module may mean a functional and structural combination of hardware for performing the technical idea of the present invention and software for driving the hardware. For example, the module may mean a logical unit of a predetermined code and a hardware resource for executing the predetermined code, which necessarily means physically connected code or means one type of hardware. It can be easily deduced to an average expert in the art of the present invention.

The display module 160 may display the digital document on the display device 110 in response to a request to read the digital document.

The determination module 150 may determine whether the front camera 120 exists and/or whether it operates normally.

The photographing device detection module 170 may detect a photographing device capable of photographing the screen displayed on the display device 110 based on the image photographed through the front camera 120 .

The face detection module 180 may detect a person's face based on an image captured by the front camera 120 .

In an embodiment, the display module 160 may display the digital document on the display device 110 when the front camera 120 exists and operates normally.

In an embodiment, the display module 160 allows viewing of the digital document when the photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display apparatus 110 . is displayed on the display device, and when a photographing device is detected from an image photographed through the front camera while the digital document is displayed on the display apparatus 110, the digital document is displayed on the display apparatus 110 in a form that cannot be read. ) or control so that the digital document is not output to the display device 110 .

In an embodiment, the display module 160 displays the digital document on the display device when the face of a person detected based on the image captured by the front camera 120 is the face of a previously authenticated user. can do.

In another embodiment, the display module 160 authenticates the face of a person detected based on the image captured by the front camera 120 while the digital document is displayed on the display device 110 in advance. If it is not the user's face, the digital document may be output to the display device 110 in an unreadable form, or the digital document may be controlled not to be output to the display device 110 .

Meanwhile, the computing device 100 may include a processor and a storage device. The processor may mean an arithmetic device capable of driving a program for implementing the technical idea of the present invention, and may perform a neural network learning method defined by the program and the technical idea of the present invention. The processor may include a single-core CPU or a multi-core CPU. The storage device may mean a data storage means capable of storing a program and various data necessary for implementing the technical idea of the present invention, and may be implemented as a plurality of storage means according to an embodiment. In addition, the storage device may be meant to include not only the main storage device included in the computing device 100 , but also a temporary storage device or memory that may be included in the processor. The memory may include high-speed random access memory and may include non-volatile memory such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Access to memory by the processor and other components may be controlled by a memory controller.

On the other hand, the method according to the embodiment of the present invention may be implemented in the form of a computer-readable program command and stored in a computer-readable recording medium, and the control program and the target program according to the embodiment of the present invention are also implemented in the computer. It may be stored in a readable recording medium. The computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored.

The program instructions recorded on the recording medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the software field.

Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and floppy disks, and hardware devices specially configured to store and execute program instructions, such as magneto-optical media and ROM, RAM, flash memory, and the like. In addition, the computer-readable recording medium is distributed in network-connected computer systems, and computer-readable codes can be stored and executed in a distributed manner.

Examples of the program instruction include not only machine code such as generated by a compiler, but also a device for electronically processing information using an interpreter or the like, for example, a high-level language code that can be executed by a computer.

The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

Claims (13)

A digital document security method performed in a computing system having a display device and a front camera, comprising:
displaying, by the computing system, the digital document on the display device in response to a request to read the digital document; and
Detecting, by the computing system, a photographing device capable of photographing a screen displayed on the display device, based on the image photographed through the front camera,
Displaying the digital document on the display device comprises:
displaying, by the computing system, the digital document on the display device in a readable form when the photographing device is not detected from the image photographed through the front camera while the digital document is displayed on the display device; and
When a photographing device is detected from the image photographed through the front camera while the digital document is displayed on the display apparatus, the computing system outputs the digital document to the display apparatus in a form that cannot be read or the digital document is displayed on the display apparatus A digital document security method comprising the step of controlling not to be output to a display device.
According to claim 1,
The document security method,
Further comprising the step of determining, by the computing system, whether the front camera exists and whether it operates normally,
Displaying the digital document on the display device comprises:
The digital document security method further comprising the step of displaying the digital document on the display device when the front camera exists and operates normally.
According to claim 1,
The document security method,
The computing system further comprising the step of detecting a person's face based on the image captured by the front camera,
Displaying the digital document on the display device comprises:
The digital document security method further comprising the step of displaying the digital document on the display device when the face of the person detected based on the image captured by the front camera is the face of the user authenticated in advance.
According to claim 1,
The document security method,
The computing system further comprising the step of detecting a person's face based on the image captured by the front camera,
When the photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display device, the computing system displays the digital document on the display device in a viewable form ,
While the digital document is displayed on the display device, the photographing device is not detected in the image photographed through the front camera, and the face of the person detected based on the image photographed through the front camera is the face of the user who is authenticated in advance In this case, the digital document security method comprising the step of displaying the digital document in a readable form on the display device.
5. The method of claim 4,
Displaying the digital document on the display device comprises:
When the face of a person detected based on the image captured through the front camera while the digital document is displayed on the display device is not the face of the previously authenticated user, the computing system is unable to read the digital document The digital document security method further comprising the step of outputting the form to the display device or controlling the digital document not to be output to the display device.
A computer program installed in a data processing apparatus and recorded on a medium for performing the method according to any one of claims 1 to 5.
A computer-readable recording medium in which a computer program for performing the method according to any one of claims 1 to 5 is recorded.
A computing system comprising:
display device; front camera; including processors and memory;
The memory is a computing system that, when executed by the processor, causes the computing system to perform the method according to any one of claims 1 to 5.
A computing system having a display device and a front camera, comprising:
a display module for displaying the digital document on the display device in response to a request for reading the digital document; and
The computing system includes a photographing device detection module for detecting a photographing device capable of photographing a screen displayed on the display device, based on the image photographed through the front camera,
The display module is
When the photographing device is not detected in the image photographed through the front camera while the digital document is displayed on the display apparatus, the digital document is displayed on the display apparatus in a viewable form,
When a photographing device is detected from an image photographed through the front camera while the digital document is displayed on the display device, the digital document is output to the display device in an unreadable form, or the digital document is not output to the display device Computing system to control so as not to.
10. The method of claim 9,
The computing system is
Further comprising a determination module for determining whether the front camera exists and whether it operates normally,
The display module is
A computing system for displaying the digital document on the display device when the front camera exists and operates normally.
10. The method of claim 9,
The computing system is
Based on the image taken through the front camera, further comprising a face detection module for detecting a person's face,
The display module is
A computing system for displaying the digital document on the display device when the face of the person detected based on the image captured by the front camera is the face of the user authenticated in advance.
10. The method of claim 9,
The computing system is
Based on the image taken through the front camera, further comprising a face detection module for detecting a person's face,
The display module is
While the digital document is displayed on the display device, the photographing device is not detected in the image photographed through the front camera, and the face of the person detected based on the image photographed through the front camera is the face of the user who is authenticated in advance In this case, the computing system for displaying the digital document in a readable form on the display device.
13. The method of claim 12,
The display module is
When the face of a person detected based on the image captured through the front camera while the digital document is displayed on the display device is not the face of the user who has been authenticated in advance, the digital document cannot be read by the display device A computing system that controls so that the digital document is not output to the display device or the digital document is not output to the display device.

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