JP2010238059A - Computer device, program, portable display device and display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a computer device, program, portable display device and display system which can display an encrypted file on the computer device, without inputting a password again, when a predetermined password is input at the portable display device to browse the encrypted file, and when the encrypted file is browsed from the computer device by being connected to the computer device. <P>SOLUTION: In a state with the portable display device connected to the computer device, when there is a password file having information of the password in the portable display device, the computer device acquires the password file, and decodes the encrypted file, based on the acquired password file. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a computer device, a program, and a portable device for displaying an encrypted data file stored in a memory of the portable display device on the computer device when the portable display device and the computer device are connected. The present invention relates to a mold display device and a display system.

  2. Description of the Related Art Conventionally, portable display devices such as electronic books that read one of data files stored in a memory and display an image corresponding to the data file are known.

  In such a portable display device, a person other than the owner may use it due to temporary rental or loss, and the owner must store the data file to be concealed in memory. Is common.

  Then, when browsing this encrypted data file (hereinafter simply referred to as “encrypted file”), a predetermined password is entered, and encryption is performed only when authentication by this password is successful. The file is decrypted (for example, see Patent Document 1).

JP 2006-237881 A

  By the way, in a portable display device that displays information of data stored in a memory as described above, it is often possible to connect to a computer device. The data file stored in the memory can be browsed.

  However, when browsing the encrypted file by inputting a predetermined password on the portable display device, the portable device is connected to the computer device to try to view the encrypted file of the portable display device from the computer device side. Then, even though the personal identification number has already been input to the portable display device, the user is required to input the personal identification number again, which makes the user feel bothersome.

  The present invention has been made in view of such circumstances, and is connected to a computer device while inputting a predetermined password on a portable display device and browsing an encrypted file. Provided are a computer device, a program, a portable display device, and a display system capable of displaying an encrypted file on a computer device without re-entering a password when browsing the encrypted file.

  In order to achieve the above object, the invention according to claim 1 is directed to a computer device that communicates with a portable display device that displays information of data stored in a memory and displays the information of data stored in the memory. A display unit, an information input unit for inputting information, a communication interface for transmitting / receiving data to / from the portable display device, and a storage unit for storing information on a personal identification number. Is formed with a secure area for storing encrypted data and a non-secure area for storing unencrypted data, and when the control unit is connected to the portable display device via the communication interface, A first process for determining whether or not the personal identification number information is stored in a predetermined storage area of the portable display device; and When it is determined that the number information is stored, the code number information is read from the predetermined storage area and stored in the storage unit, and the code number information stored in the predetermined storage area is erased. Processing, a third process for decrypting the encrypted data stored in the memory based on the information of the personal identification number stored in the storage unit, and a second unit for displaying the data decrypted in the third process on the display unit. 4 processes were executed.

  According to a second aspect of the present invention, in the computer device according to the first aspect, when there is a request for browsing the secure area of the memory by an operation on the information input unit, the information on the personal identification number is stored in the storage unit. If not stored, a fifth process is performed in which a display for prompting the input of a personal identification number is performed on the display unit.

  Further, in the invention according to claim 3, in the computer device according to claim 2, when it is detected that a request for disconnecting communication with the portable display device has been made by an operation to the information input unit, the storage unit If the personal identification number information is stored in the storage unit, the personal identification number information stored in the storage unit is stored in the predetermined storage area of the portable display device via the communication interface. It has a special feature.

  According to a fourth aspect of the present invention, there is provided a program characterized by causing the control unit of the computer device according to any one of the first to third aspects to execute each of the processes.

  According to a fifth aspect of the present invention, there is provided a portable display device capable of displaying information on data stored in a memory and reading out information on data stored in the memory from an external computer device. A display unit; a memory interface that reads data stored in the memory; a communication interface that transmits and receives data to and from the computer device; an information input unit that inputs information; and a storage unit that stores information on a personal identification number The memory includes a secure area for storing encrypted data and a non-secure area for storing non-encrypted data, and the control unit is configured to secure the memory by the information input unit. When there is a request for browsing the area, if the information on the personal identification number is not stored in the storage unit, the personal identification number is displayed on the display unit. A first process for displaying a prompt to input a number, a second process for storing the input password information in the storage unit when the password information is input from the information input unit, and the information A third process for decrypting the encrypted data stored in the secure area of the memory based on the password information input from the input unit, and a fourth process for displaying the data decrypted in the third process on the display unit Communication with the computer device via the communication interface is established, and when the communication is subsequently disconnected, if the information on the personal identification number is stored in the storage unit, the display unit A fifth process for displaying a selection request screen for selecting whether or not the encrypted data in the area can be displayed, and the information input in a state where the selection request screen is displayed on the display unit When the selection operation for enabling display of the encrypted data in the secure area is performed, the storage of the code number information in the storage unit is maintained, and the encrypted data in the secure area is displayed by the information input unit. When there is a selection operation that cannot be performed, the sixth process of deleting the information of the personal identification number from the storage unit is executed.

  According to a sixth aspect of the present invention, in the portable display device according to the fifth aspect, the sixth process includes the secure input by the information input unit when the selection request screen is displayed on the display unit. When a selection operation for enabling display of the encrypted data in the area is performed, a title list of the encrypted data stored in the secure area of the memory is displayed on the display unit.

  The invention according to claim 7 is the portable display device according to claim 6, further comprising a second storage unit that stores information on the personal identification number, and is input from the information input unit in the second process. The information of the personal identification number is stored in the second storage unit, and in the third process, the encrypted data is decrypted by the information of the personal identification number stored in the second storage unit. In the fifth process, When communication with the computer device via the communication interface is established and then the communication is disconnected, if the password information is stored in the storage unit, the password information is stored in the second information. The information stored in the storage unit is erased from the information of the personal identification number from the storage unit, and communication with the computer device via the communication interface is established. In, characterized in that performing a seventh process of erasing information of personal identification number stored in said second storage unit.

  The invention according to claim 8 is a portable display device that displays information of data stored in a memory and that can read information of data stored in the memory from an external computer device. A display unit; a memory interface that reads data stored in the memory; a communication interface that transmits and receives data to and from the computer device; an information input unit that inputs information; and a storage unit that stores information on a personal identification number The memory includes a secure area for storing encrypted data and a non-secure area for storing non-encrypted data, and the control unit is configured to secure the memory by the information input unit. When there is a request for browsing the area, if the information on the personal identification number is not stored in the storage unit, the personal identification number is displayed on the display unit. A first process for displaying a prompt to input a number, a second process for storing the input password information in the storage unit when the password information is input from the information input unit, and the information A third process for decrypting the encrypted data stored in the secure area of the memory based on the password information input from the input unit, and a fourth process for displaying the data decrypted in the third process on the display unit When the communication with the computer device via the communication interface is established and then the communication is disconnected, if the password information is stored in the storage unit, it is stored in the secure area of the memory. The fifth process of decrypting the encrypted data and displaying the decrypted data on the display unit is executed.

  According to a ninth aspect of the present invention, there is provided a portable display device that displays information on data stored in a memory, and a computer device that communicates with the portable display device and displays information on data stored in the memory. In the display system provided, the memory includes a secure area for storing encrypted data and a non-secure area for storing unencrypted data. The portable display device includes a control unit, a display, A memory interface that reads data stored in the memory, a communication interface that transmits and receives data to and from the computer device, an information input unit that inputs information, and a storage unit that stores information on a personal identification number; The control unit of the portable display device includes the recording unit when a request to browse the secure area of the memory is made by the information input unit. If the password information is not stored in the unit, the first process for displaying the password to be input on the display unit, and when the password information is input from the information input unit, the input is performed. A second process for storing the information on the personal identification number in the storage unit; a third process for decrypting the encrypted data stored in the secure area of the memory by the personal identification number information input from the information input unit; And a fourth process for displaying the data decoded in the third process on the display unit, and the computer device includes a control unit, a display unit, an information input unit for inputting information, A communication interface for transmitting and receiving data to and from the portable display device; and a storage unit for storing information on a personal identification number. The control unit of the computer device includes the communication interface. Then, when connected to the portable display device, a first process for determining whether or not the information of the personal identification number is stored in the storage unit of the portable display device, and the storage of the portable display device When it is determined that the personal identification number information is stored in the storage unit, the personal identification number information is read from the storage unit of the portable display device, stored in the storage unit, and the storage of the portable display device A second process of erasing the password number information stored in the storage unit, and a second process of decrypting the encrypted data stored in the memory based on the password number information included in the password number information stored in the storage unit. 3 processing and the 4th process which displays the data decoded by the said 3rd process on the said display part were performed.

  According to the computer device, the program, the portable display device, and the display system according to the present invention, the computer is connected to the computer device while inputting the predetermined password on the portable display device and browsing the encrypted file. When browsing the encrypted file from the device, the encrypted file can be displayed on the computer device without re-entering the password.

It is explanatory drawing which shows the external appearance of a portable display apparatus. It is explanatory drawing which shows the hierarchy state of a folder and a data file. It is explanatory drawing which shows the data structure of a document file. It is explanatory drawing which shows the data structure of a folder file. It is explanatory drawing which shows the state which displayed the hierarchical structure of the file in a memory card with a portable display device. It is explanatory drawing of operation | movement in the state which connected the portable display apparatus and the computer apparatus. It is the block diagram which showed the electrical structure in the state which connected the portable display apparatus and the computer apparatus. It is explanatory drawing which showed the process in this embodiment. It is explanatory drawing which showed the process in this embodiment.

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

[Outline of this embodiment]
First, an outline of the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the portable display device 1 is a thin device having a planar shape, and a display unit 2 having a size of about A4 is provided as a display unit on the front surface thereof. The display unit 2 can be constituted by, for example, an electrophoretic display panel or a liquid crystal panel (LCD).

  On the right side of the display unit 2, an LED 3 indicating the state of the portable display device 1 and operation buttons 4 used for various operations are arranged. That is, a power button 5a, a menu button 5b, a document close button 5c, an enlarge button 5d, page feed buttons 5f and 5g, and area selection buttons 6 (6a to 6m) are arranged as operation buttons 4.

  The user of the portable display device 1 can select, display, and create a data file to be displayed on the display unit 2 by operating the operation button 4. In the present embodiment, as a “data file” that can be handled by the portable display device 1, a data file (hereinafter referred to as “document file”) for displaying a document composed of characters, figures, and the like, a photograph, and a CG. However, the present invention is not limited to this. In the following, a document file will be described as an example of a data file for ease of explanation.

  A memory interface (I / F) 106 for inserting the memory card 8 is provided on the right side surface of the portable display device 1. In the portable display device 1, a document file or the like stored in the memory card 8 can be read via the memory card I / F 106 and displayed on the display unit 2.

  For example, document files and folder information files (hereinafter referred to as “folder files”) are stored in the memory card 8 in a hierarchical structure as shown in FIG. Security settings are made for the (security folder) and the document files (documents 2 and 3) in the folder.

  For example, as shown in FIG. 3, the document file is composed of a property information file (see FIG. 3A) and a data body file (see FIG. 3B). The property information file includes a document ID that is a file ID, information on the presence / absence of security settings (hereinafter referred to as “security setting information”), property information having information such as title information, and the like. Note that the document file for which the security setting has been made is encrypted and stored in the memory card 8 except for the document ID. For example, DES or IDEA can be used as the encryption method.

  On the other hand, there is one folder file for each folder, and it has a data structure as shown in FIG. For example, when the top folder shown in FIG. 2 is illustrated, as shown in FIG. 4A, in addition to the folder ID for identifying the folder, the document ID and folder for identifying the document file included in the folder are also shown. A folder ID for identifying the file is included.

  Further, as shown in FIG. 4B, the security folder in the top folder includes a document ID for identifying a document file included in the security folder. All document files and folder files in the security folder are encrypted files. Of the storage areas of the memory card 8, an area for storing data files with security settings such as a security folder is called a secure area, and an area for storing data files without security settings is a non-secure area. That's it.

  These folder files function as list information when displaying a title list (in-folder title list) that lists the title information of each document file and folder file included in the folder.

  That is, when the hierarchical structure of the files in the memory card 8 is displayed on the display unit 2 of the portable display device 1, for example, as shown in FIG. 5A, title lists of document files and folder files included in the top folder are displayed. Will be shown.

  The security folder can be browsed by pressing “2” (area selection button 6d) of the area selection button 6. When the area selection button 6d is pressed, the personal identification number is displayed as shown in FIG. 5B. You will be asked to enter your (password).

  At this time, each of the area selection buttons 6a to 6m functions as a keyboard for inputting a personal identification number. When the personal identification number is input by operating the area selection buttons 6a to 6m and authentication is successful, FIG. ), The title of the document file included in the security folder is decrypted and displayed. At this time, a personal identification number file including the personal identification number information is generated in the portable display device 1 based on the inputted personal identification number. Thereafter, when a document file included in the security folder is selected by operating the area selection button 6 or the like, the document data body of the document file thus selected is decrypted based on the input password. Displayed.

  In such a situation where the security folder is selected, the portable display device 1 and the computer device 11 are communicably connected by the connection cable 12 as shown in FIG.

  At this time, the display unit 2 of the portable display device 1 displays that it is communicating with the computer device 11, and various input operations to the operation buttons 4 are disabled, while the display 13 of the computer device 11 is inactive. For example, software for browsing a data file in the memory card 8 attached to the portable display device 1 (herein, software called “display device data viewer”), for example, a document file directly under the top folder, The folder file title is displayed.

  In the computer device 11, the data file in the memory card 8 can be displayed on the display unit 2 in a hierarchical structure called a directory according to the data of the folder file, and when a document file is selected while displaying this hierarchical structure. Information (document data main body etc.) included in the selected document file is displayed on the display unit 2.

  If an attempt is made to open an encrypted file (ie, an encrypted folder file or document file) while browsing the hierarchical structure in the memory card 8 from the computer device 11, if it is conventional, FIG. As shown, it is necessary to input the password again.

  Therefore, even though the personal identification number has already been input in order to view the encrypted file on the portable display device 1, the personal identification number has to be input again from the computer device. There was a case where it was annoying.

  On the other hand, according to the present invention, when the personal identification number has already been input on the portable display device 1 and the security folder or the directory immediately under the security folder is being browsed, FIG. As shown, the encrypted file can be viewed from the connected computer device without re-entering the password.

  Specifically, the computer device 11 acquires a personal identification number file generated in the portable display device 1, and decrypts the encrypted file based on the acquired personal identification number file.

  Thereby, the user can save the trouble of inputting the password again and prevent the user from feeling troublesome as much as possible.

[Specific configuration]
Next, a specific configuration in the present embodiment will be described in detail.

  FIG. 7 is a block diagram showing an electrical configuration in a state where the portable display device 1 and the computer device 11 are connected. As shown in FIG. 7, the portable display device 1 includes a CPU 100, a ROM 101, a RAM 102, an EEPROM 103, a key input interface (hereinafter abbreviated as “key input I / F”) 104, a display controller 105, a memory An interface (hereinafter abbreviated as “memory card I / F”) 106 and a communication interface (hereinafter abbreviated as “communication I / F”) 107 are provided, and are connected to each other via a system bus 108. .

  The ROM 101 stores a program for realizing each process described later by being executed by the CPU 100.

  The RAM 102 functions as a temporary storage area for various flags and image data referred to by the CPU 100. The CPU 100, the ROM 101, and the RAM 102 described above constitute the control unit 109 of the portable display device 1.

  The EEPROM 103 is an electrically erasable PROM (Electrically Erasable Programmable ROM), and functions as a storage unit that stores the password file in a state where it can be acquired or written by the computer device 11.

  The key input I / F 104 is responsible for connection with the operation button 4 and plays a role of writing in the RAM 102 that there is an input from a predetermined key based on a signal output from the operation button 4 by the input operation. I'm in charge. In this embodiment, the key input I / F 104 and the operation button 4 function as an information input unit 110 for inputting information.

  The display controller 105 is responsible for connection with the display unit 2, and controls screen display on the display unit 2 in accordance with a command from the CPU 100.

  The memory card I / F 106 is responsible for connection with the memory card 8, and reads / writes data from / to the memory card 8 in accordance with a command from the CPU 100 or a command from the computer device 11 via the communication I / F 107.

  The communication I / F 107 is responsible for connection with an externally connected device, particularly the computer device 11 in this embodiment, and can communicate by connecting the portable display device 1 and the computer device 11 using the connection cable 12. It is said.

  On the other hand, the computer device 11 includes a CPU 200, a ROM 201, a RAM 202, a communication I / F 203, an information input interface (hereinafter abbreviated as “information input I / F”) 204, a display controller 205, and a hard disk drive (hereinafter referred to as “information input I / F”). , Abbreviated as “HDD”) 206, and are connected to each other via a system bus 207.

  The ROM 201 stores information on various devices necessary for starting up the computer device 11, programs, and the like.

  The RAM 202 functions as a temporary storage area for various flags and image data referred to by the CPU 200. Note that the CPU 200, the ROM 201, and the RAM 202 described above constitute the control unit 208 of the computer apparatus 11.

  The communication I / F 203 is responsible for connection with an externally connected device, particularly the portable display device 1 in this embodiment, and is connected to the communication I / F 107 of the portable display device 1 using the connection cable 12. Communication is possible.

  The information input I / F 204 is responsible for connection with the mouse 209 and the keyboard 210, and indicates that there is an input from a predetermined input device based on a signal output from the mouse 209 or the keyboard 210 by an input operation. It plays a role of writing in the RAM 102. In this embodiment, the information input I / F 204, the mouse 209, and the keyboard 210 function as an information input unit 211 that inputs information.

  The display controller 205 is responsible for connection with the display 13, and controls screen display on the display 13 in accordance with a command from the CPU 200. In the present embodiment, the display unit 205 is configured by the display controller 205 and a display.

  The HDD 206 functions as a large-capacity recording medium, and is executed by the CPU 200 to store software for realizing each process to be described later, specifically, the above-described display device data viewer program and the like. Has been

[Processing of portable display device and computer device]
Next, processing executed by the portable display device 1 and the computer device 11 will be described with reference to FIGS. 8 and 9 are explanatory diagrams showing processing steps in the present embodiment. In FIG. 8 and FIG. 9, processing executed by each device will be described in parallel in order to make the processing of both the portable display device 1 and the computer device 11 easier to understand. 8 and 9 show processing steps for ease of explanation, and are not necessarily executed by the portable display device 1 or the computer device 11, but also describe the steps executed by the user. is doing.

  First, when an operation for browsing the security folder is performed on the portable display device 1 by a user operation on the information input unit 110 (a title list in the security folder is displayed), the CPU 100 of the portable display device 1. Displays a message prompting the user to input a personal identification number on the display unit 2 of the portable display device 1 (step S11). In this process, when there is a request for browsing the secure folder of the memory card 8 by the information input unit 110, if the PIN information is not stored in the RAM 102, the display 212 prompts the input of the PIN number. If the personal identification number information is stored in the RAM 102, the display unit 212 is not prompted to input the personal identification number.

  Next, the CPU 100 performs a process of accepting a password entered by the user using the operation button 4 (step S12), generates a password file having the input password as information, and stores it in the EEPROM 103 (step S13). This step S13 is the second process of the portable display device 1 that stores the entered password information in the storage unit (EEPROM 103) when the password information is input from the information input unit 110.

  Next, the CPU 100 refers to the personal identification number file in the EEPROM 103, stores the personal identification number information in the RAM 102, and executes the decryption process of the encrypted file based on the personal identification number (step S14). This step S14 is a third process of the portable display device 1 that decrypts the encrypted data stored in the secure folder of the memory card 8 based on the password information input from the information input unit 110. Note that the personal identification number information written in the RAM 102 is used by the CPU 100 when browsing the document file or folder file in the secure folder by the user's operation on the information input unit 110, and the information input by the user. Once the document file or folder file other than the secure folder is browsed by operating the unit 110, the information on the personal identification number stored in the RAM 102 is deleted by the CPU 100.

  After performing the decryption process in step S14, the CPU 100 displays the information included in the decrypted encrypted file on the display unit 2 (step S15). In step S15, if the security file selected by the user is a folder file, a title list is displayed. If the security file is a document file, information included in the document file is displayed. This step S15 is the fourth process of the portable display device 1 that displays the data decrypted in the third process on the display unit 2.

  Then, the user performs an operation of connecting the portable display device 1 and the computer device 11 with the connection cable 12 (step S16).

  When the connection cable 12 is connected to the portable display device 1 by the user in step S <b> 16, the portable display device 1 detects that the connection cable 12 is connected, and the password stored in the RAM 102. Is erased (step S17). This step S17 is a seventh process of the portable display device 1 for erasing the code number information stored in the RAM 102 as the second storage unit when communication with the computer device 11 via the communication interface 107 is established. It is.

  Next, when the description of the processing is transferred to the computer device 11, first, when the user confirms that the connection between the computer device 11 and the portable display device 1 by the connection cable 12 is established, the display device data viewer described above is established. When the display device data viewer is activated by the user, the CPU 200 of the computer device 11 reads the display device data viewer program from the HDD 206 and executes it. Thereby, communication via the connection cable 12 is established between the portable display device 1 and the computer device 11, and the computer device 11 is caused to execute the following various processes (step S20).

  First, the CPU 200 of the computer apparatus 11 determines whether or not there is a request for browsing a secure folder that is a secure area by an operation on the information input unit 211 by the user (step S29). If the CPU 200 determines that there is no request for browsing the secure folder (step S29: No), the CPU 200 executes various processes based on the user's operation. On the other hand, if the CPU 200 determines that there is a request for browsing the secure folder (step S29: Yes), the process proceeds to step S21.

  Next, the CPU 200 communicates with the portable display device 1 and searches for a personal identification number file in the EEPROM 103 of the portable display device 1 (step S21).

  Then, the CPU 200 determines whether or not there is a personal identification number file in the EEPROM 103 of the portable display device 1 (step S22). This step S22 is a first process of the computer device 11 for determining whether or not the information of the personal identification number is stored in the EEPROM 103 of the portable display device 1 when connected to the portable display device 1 via the communication interface 203. It is.

  If the CPU 200 determines that there is a personal identification number file in the EEPROM 103 (step S22: Yes), the process proceeds to step S23. On the other hand, when the CPU 200 determines that there is no personal identification number file in the EEPROM 103 (step S22: No), a message prompting the input of the personal identification number is displayed on the display unit 212 (step S27), and the user inputs the information input unit. A process of accepting a password entered at 211 is performed (step S28). Step S22, step S27, and step S28 described above are performed when the information on the password is not stored in the RAM 202 when a request for browsing the secure folder of the memory card 8 is made by operating the information input unit 211. It is a fifth process of the computer device 11 that performs a display prompting the input of a password on the display unit 212.

  In step S23, the CPU 200 reads the personal identification number file from the EEPROM 103 of the portable display device 1, stores the personal identification number information included in the personal identification number file in the RAM 202 of the computer device 11, and then continues to the portable display device 1. The personal identification number file stored in the EEPROM 103 is deleted (step S24). In step S23 and step S24, when it is determined that the code number information is stored in the EEPROM 103 of the portable display device 1, the code number information is read from the EEPROM 103, stored in the RAM 202, and the code number stored in the EEPROM 103. This is the second process of the computer device 11 for erasing the number information.

  Next, the CPU 200 of the computer apparatus 11 decrypts the encrypted file (step S25), and displays the decrypted encrypted file information on the display 13 (step S26). Step S25 is a third process of the computer device 11 for decrypting the encrypted data stored in the memory card 8 based on the information of the personal identification number stored in the RAM 202, and step S26 is decrypted in the third process. This is a fourth process of the computer device 11 for displaying data on the display unit 212. The encrypted file decrypted and displayed in steps S25 and S26 is a folder file of the security folder, and a title list of the document file and the folder file included in the security folder is displayed on the display unit 212. Become. After that, based on the personal identification number information stored in the RAM 202, the CPU 200 decrypts the document file or folder file in the secure folder stored in the memory card 8 by the user's operation on the information input unit 211, and displays the display unit. 2 will be displayed. In step S29, browsing of the document file in the security folder may be individually requested for browsing.

  As described above, when the computer device 11 is connected to the portable display device 1 in a state where the security folder which is the secure area is opened on the portable display device 1, without inputting the personal identification number in the computer device 11. Information in the security folder can be browsed.

  Next, processing when the connection between the portable display device 1 and the computer device 11 is terminated will be described with reference to FIG.

  As shown in FIG. 9, first, in a state where the display device data viewer program is being executed on the computer device 11, an operation for terminating the connection with the portable display device 1 is performed by an operation on the information input unit 211 by the user. When this occurs (step S30), the CPU 200 saves the personal identification number file stored in the RAM 202 of the computer device 11 in the EEPROM 103 of the portable display device 1 via the communication I / F 203 (step S31). Note that this process is not performed unless the personal identification number file is stored in the RAM 202. For example, when the portable display device 1 that is not in the browsing state in the secure folder is connected to the computer device 11 and thereafter the browsing in the secure folder is not performed in the computer device 11, the personal identification number file is not stored in the RAM 202. Thus, the process of step S31 and the following step S32 is not performed. If it is detected in step S30 and step S31 that a request for disconnecting communication with the portable display device 1 has been made by an operation on the information input unit 211, if the information on the personal identification number is stored in the RAM 202, the communication interface This is a sixth process of the computer device 11 that stores the information of the personal identification number stored in the RAM 202 via 203 in the EEPROM 103 of the portable display device 1.

  Next, the CPU 200 deletes the personal identification number file stored in the RAM 202 of the computer device 11 (step S32), and the portable display device 1 by software (processing executed by the program of the display device data viewer) Communication with the computer device 11 is terminated (step S33). At this time, the software may optionally be terminated.

  Subsequently, the connection cable 12 that has connected the portable display device 1 and the computer device 11 is removed by the user, and the state becomes independent.

  When the CPU 100 of the portable display device 1 determines that the connection cable 12 is removed and the communication with the computer device 11 is completed, the CPU 100 executes a search for a password file in the EEPROM 103 (step S40).

  Then, the CPU 100 determines whether or not there is a personal identification number file in the EEPROM 103 (step S41). That is, when the execution of the display device data viewer on the computer device 11 is finished, it is determined whether or not the personal identification number file is stored in the EEPROM 103 from the computer device 11. If the CPU 100 determines that there is no personal identification number file in the EEPROM 103 (step S41: No), the encrypted file cannot be browsed unless a personal identification number is input. Various processes are executed based on this.

  On the other hand, if the CPU 100 determines that there is a personal identification number file in the EEPROM 103 (step S41: Yes), the CPU 100 inquires the user about whether or not to maintain the display of the encrypted data. Is displayed (step S42), and an input to the information input I / F 204 from the user is awaited. Note that the above-described steps S40 and S41 and step S42 are the same as the case where the communication with the computer apparatus 11 via the communication I / F 107 is established and then the communication is cut off, so that the PIN code information is stored in the EEPROM 103. If so, the fifth process of the portable display device 1 displays a selection request screen for allowing the display unit 2 to select whether or not the encrypted data of the secure folder of the memory card 8 can be displayed.

  Next, the CPU 100 determines whether or not the input to the information input I / F 204 from the user is an input for maintaining (step S43). If the CPU 100 determines that the input by the user is not an input to be maintained, that is, if the CPU 100 determines that the input is not to be maintained, the CPU 100 moves the process to step S48.

  In step S48, the CPU 100 deletes the personal identification number file stored in the EEPROM 103 (step S48), and the folder file of the hierarchy set by default in the display unit 2 (for example, the folder included in the folder file of the top folder). The file title is displayed (title list is displayed) (step S49), and thereafter, various processes are executed based on the user's operation on the information input I / F 204.

  On the other hand, if the CPU 100 determines in step S43 that the input is to maintain (step S43: Yes), the CPU 100 moves the process to step S44.

  In step S44, the CPU 100 acquires the password information from the password file stored in the EEPROM 103 and stores it in the RAM 102 (step S44). Note that in steps S43 and S48 and step S44 described above, there was a selection operation for enabling the encrypted data in the secure folder to be displayed by the information input unit 110 while the selection request screen is displayed on the display unit 2. At this time, there is a selection operation in which the password information is stored in the storage unit (however, the information is transferred from the EEPROM 103 to the RAM 102) and the encrypted data of the secure folder cannot be displayed by the information input unit 110. Is the sixth process of the portable display device 1 for erasing the password information from the EEPROM 103.

  Next, the CPU 100 deletes the personal identification number file stored in the EEPROM 103 (step S45).

  Next, the CPU 100 decrypts the encrypted file (step S46), and displays the folder file of the shallowest hierarchy (here, the folder file of the secure folder) on the display unit 2 among the decrypted encrypted files. (Step S47). After that, various processes are executed based on user operations.

  In the above description, a secure folder and a non-secure folder are stored in the memory card 8 attached to the memory card I / F 106 of the portable display device 1. Even when a secure folder and a non-secure folder are stored in the EEPROM, the same processing as described above can be executed.

  In the above description, the secure folder has been mainly described. However, the present invention is not limited to this. If there is an encrypted document file in the non-secure folder, the same processing is performed for browsing the document file. Is possible. That is, when accessing the encrypted file in the secure area, the same processing as that for accessing the secure folder can be performed.

  As described above, in the display system according to the present embodiment, when the computer device 11 is connected to the portable display device 1 in which the password is input and the inside of the secure area is in the browsing state, the computer device 11 is connected to the portable display device. The information of the password is acquired from 1. Therefore, the user can browse the data file in the secure area on the computer device 11 without inputting the password again.

  Further, when the communication between the computer device 11 and the portable display device 1 is terminated from this state, the information on the personal identification number is transmitted from the computer device 11 to the portable display device 1. Therefore, the user can browse the information of the data file in the secure area without inputting the information of the personal identification number.

  In addition, when the communication between the computer device 11 and the portable display device 1 is terminated, a selection request screen is displayed on the display unit 2 and information in the secure area is browsed on the portable display device 1. If the information of whether or not the information is selected and the information in the secure area is not browsed, the information of the personal identification number is deleted. Therefore, if you do not browse the data file information in the secure area, you will not be able to view the information in the secure area without entering the password again, and you will be able to easily set the security. When browsing the information of the data file in the area, the information in the secure area can be browsed without inputting the password again, and the troublesomeness of inputting the password can be reduced.

  In the above-described embodiment, in the portable display device 1, when the communication with the computer device 11 is disconnected, if the information of the personal identification number is stored, the selection request screen is displayed and the user is allowed to select. Although the process (steps S41 to S47) is executed, it may be set to execute a different process depending on the user's operation on the information input unit 110. That is, the encrypted data stored in the secure folder of the memory card 8 is decrypted and the decrypted data is displayed on the display unit 2 without executing steps S41 to S43 and displaying the selection request screen. (Processing in steps S44 to S47).

  In this way, the user can display information in the secure folder on the display unit 2 without performing a selection operation on the selection request screen, and can reduce the complexity of the input operation.

  In this embodiment, as shown in FIGS. 3 to 5, the folder name before decryption and the folder name after decryption are displayed as the same “security folder”. To prevent the contents from being inferred based on the name by the three parties, “Security Folder” is displayed on the screen before decryption, and another specific folder name is displayed after decryption. You may comprise.

  As described above, according to the computer device, the program, the portable display device, and the display system shown in the present embodiment, the following effects can be expected.

(1) According to the computer device 11 according to the present embodiment, the information of the data stored in the memory card 8 is displayed by communicating with the portable display device 1 that displays the information of the data stored in the memory card 8 (memory). In order to store the control unit 208, the display unit 212, the information input unit 211 for inputting information, the communication interface 203 for transmitting / receiving data to / from the portable display device 1, and the code number information. RAM 202 (storage unit), and the memory card 8 is formed with a secure folder (secure area) for storing encrypted data and a non-secure folder (non-secure area) for storing unencrypted data. When the control unit 208 is connected to the portable display device 1 via the communication interface 203, the control unit 208 of the portable display device 1 The first process for determining whether or not the password information is stored in the EPROM 103 (predetermined storage area) (the process in step S22), and the password information is stored in the EEPROM 103 of the portable display device 1 When the determination is made, a second process (steps S23 and S24) of reading out the code number information from the EEPROM 103 and storing it in the RAM 202 (storage unit) and erasing the code number information stored in the EEPROM 103, and storing in the RAM 202. The display unit 212 displays the data decrypted in the third process (the process in step S25) and the third process (the process in step S25) for decrypting the encrypted data stored in the memory card 8 on the basis of the information on the password. Portable display device because the fourth process (the process of step S26) to be displayed is executed. When a predetermined password is entered and the encrypted file is browsed (the secure area is browsed), when the encrypted file is browsed from the computer device 11 by connecting to the computer device 11, the password is re-established. The encrypted file can be displayed on the computer device 11 without input.

(2) When there is a request to browse the secure holder (secure area) of the memory card 8 (memory) by an operation on the information input unit 211, the display is made if the PIN code information is not stored in the RAM 202 (storage unit). Since the fifth process (the process of steps S22, S27, and S28) for performing the display for prompting the input of the personal identification number on the unit 212 is executed, the portable display of the computer device 11 in a state where the personal identification number file is not stored. Even when connected to the device 1, the secure area can be browsed on the computer device 11 by inputting the password from the computer device 11.

(3) When it is detected that a request for disconnecting communication with the portable display device 1 has been made by an operation on the information input unit 211, if the information on the personal identification number is stored in the RAM 202 (storage unit), the communication interface 203 Since the sixth process (the processes in steps S30 and S31) for storing the information of the personal identification number stored in the RAM 202 through the memory in the EEPROM 103 (predetermined storage area) of the portable display device 1 is executed, the portable display Even after the communication between the device 1 and the computer device 11 is disconnected, the encrypted file in the secure area can be viewed on the portable display device 1 without inputting the password again.

(4) According to the program shown in this embodiment, since the control unit 208 of the computer apparatus 11 according to any one of claims 1 to 3 is caused to execute each of the processes, The computer apparatus 11 can have the same effects as described above.

(5) Further, according to the portable display device 1 shown in the present embodiment, information of data stored in the memory card 8 (memory) is displayed, and data stored in the memory card 8 from the external computer device 11 is displayed. In the portable display device 1 that can read the information, the control unit 109, the display unit 2, the memory interface 106 that reads data stored in the memory card 8, and the communication that transmits and receives data to and from the computer device 11. An interface 107, an information input unit 110 for inputting information, and an EEPROM 103 and / or a RAM 102 (storage unit) for storing information on a personal identification number are provided. The memory card 8 includes a secure folder (for storing encrypted data). Secure area) and non-secure folder that stores unencrypted data (non-secure area) When the information input unit 110 requests browsing of the secure area of the memory card 8 and the EEPROM 103 does not store the password information, the control unit 109 displays the password on the display unit 212. A first process for displaying a prompt for entering a number (steps S 10 and S 11) and a process for storing the entered password information in the EEPROM 103 when the password information is input from the information input unit 110. 2 processing (processing of step S13), 3rd processing (processing of step S14) which decrypts the encryption data memorize | stored in the secure folder of the memory card 8 with the information of the PIN code input from the information input part 110, A fourth process (the process of step S15) for displaying the data decrypted in the third process on the display unit 2, and a communication interface 107 When the communication with the computer device 11 is established and then the communication is disconnected, the encrypted data in the secure area of the memory card 8 is displayed on the display unit 2 if the EEPROM 103 stores the password information. In the state where the selection request screen is displayed on the display unit 2 in the fifth process (the process of steps S40 to S42) for displaying a selection request screen for selecting whether to enable or not, the information input unit 110 When there is a selection operation for enabling display of the encrypted data in the secure folder, the information of the password is maintained in the EEPROM 103 and / or the RAM 102, and the encrypted data in the secure area can be displayed by the information input unit 110 When there is a selection operation not to be performed, a sixth process (steps S43 and S44) for erasing the password information from the EEPROM 103 If the user wishes to display encrypted data in the secure area after the communication is completed, the computer apparatus 11 can be operated in response to the above-described processing of the computer device 11. It is possible to save the user from inputting the password again.

(6) In the sixth process, when the selection request screen is displayed on the display unit 2 and the information input unit 110 performs a selection operation to display the encrypted data in the secure area, the memory card 8 ( Since the title list of the encrypted data stored in the secure area of the memory is displayed on the display unit 2 (processing in step S47), it is possible to save the user from inputting the password again.

(7) A RAM 102 (second storage unit) for storing the personal identification number information is provided. In the second process (step S13), the personal identification number information input from the information input unit 110 is stored in the RAM 102. In the third process (the process in step S14), the encrypted data is decrypted based on the password information stored in the RAM 102. In the fifth process (the processes in steps S40 to S42), the computer apparatus 11 via the communication interface 107 is used. If the PIN code information is stored in the EEPROM 103 (storage unit) when the communication is established and then the communication is disconnected, the PIN number information is stored in the RAM 102 and the PIN code is stored in the EEPROM 103. The information is erased, and the communication interface 107 is used for the compilation. Since the seventh process (the processes of steps S45 and S17) for erasing the password information stored in the RAM 102 is executed when communication with the data device 11 is established, the memory card 8 is formed. Security can be enhanced by limiting the access right to the secure area to one.

(8) In the portable display device 1 that displays the information of the data stored in the memory card 8 (memory) and can read out the information of the data stored in the memory card 8 from the external computer device 11, the control unit 109 A display unit 2, a memory interface 106 that reads data stored in the memory card 8, a communication interface 107 that transmits / receives data to / from the computer device 11, an information input unit 110 that inputs information, and a password An EEPROM 103 (storage unit) for storing information, and the memory card 8 includes a secure folder (secure area) for storing encrypted data and a non-secure folder (non-secure area) for storing unencrypted data. The control unit 109 uses the information input unit 110 to store the memory card. If the password information is not stored in the EEPROM 103 when there is a request to browse the secure area, the first process for displaying the prompt to input the password on the display unit 2 (the process in steps S10 and S11). When the password information is input from the information input unit 110, a second process (step S13) of storing the input password information in the EEPROM 103, and the password input from the information input unit 110 The third processing (step S14 secure folder) for decrypting the encrypted data stored in the secure area of the memory card 8 based on the number information and the data decrypted by the third processing (step S14 processing) are displayed on the display unit 2. The fourth process to be displayed (the process of step S15) and communication with the computer device 11 via the communication interface 107 When the communication is disconnected after the establishment, if the PIN 103 information is stored in the EEPROM 103, the encrypted data stored in the secure area of the memory card 8 is decrypted, and the decrypted data is displayed on the display unit. Since the fifth process (the processes of steps S41, S46, and S47) displayed on the screen 2 is executed, it can be operated in response to the process of the computer device 11 described above, and secure after the communication is completed. When displaying the encrypted data of the area, it is possible to save the user from inputting the password again.

(9) A portable display device 1 that displays information on data stored in the memory card 8 (memory), and a computer device 11 that communicates with the portable display device 1 and displays information on data stored in the memory card 8. In the display system including the memory card 8, a secure area for storing the encrypted data and a non-secure area for storing the non-encrypted data are formed. 109, a display unit 2, a memory interface 106 for reading data stored in the memory card 8, a communication interface 107 for transmitting / receiving data to / from the computer device 11, an information input unit 110 for inputting information, and a password And an EEPROM 103 (storage unit) for storing the information of the portable display device 1. 10, when there is a request to browse the secure area of the memory card 8, if the password information is not stored in the EEPROM 103, the first process for displaying the password to input the password on the display unit 2 (step S 10, S11), and when the information of the password is input from the information input unit 110, the second process of storing the input password information in the EEPROM 103 (the process of step S13), and the information input unit 110 In the third process (the process of step S14) and the third process (the process of step S14) for decrypting the encrypted data stored in the secure area of the memory (the process of the memory card 8) based on the input password information 4th process (process of step S15) which displays the decoded data on the display part 2, and performs the computer apparatus 11 A control unit 208, a display unit 212, an information input unit 211 for inputting information, a communication interface 203 for transmitting / receiving data to / from the portable display device 1, and a RAM 202 (storage unit) for storing information on a personal identification number When the control unit 208 of the computer device 11 is connected to the portable display device 1 via the communication interface 203, is the password information stored in the EEPROM 103 of the portable display device 1? When it is determined that the password information is stored in the EEPROM 103 of the portable display device 1 and the first processing for determining whether or not the password information is stored in the EEPROM 103 of the portable display device 1 Is read out and stored in the RAM 202, and the PIN code stored in the EEPROM 103 of the portable display device 1 is read. Second processing for erasing information (processing in steps S23 and S24), and decrypting the encrypted data stored in the memory card 8 based on the security code information included in the security code information stored in the storage unit (RAM 202) Performing a third process (process in step S25) to be converted, and a fourth process (process in step S26) for displaying the data decoded in the third process (process in step S25) on the display unit 212. For this reason, when the portable display device 1 is browsing the encrypted file by inputting a predetermined personal identification number, when the encrypted file is viewed from the computer device 11 by connecting to the computer device 11, The encrypted file can be displayed on the computer device 11 without re-input.

  Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment. For this reason, it is a matter of course that various modifications can be made in accordance with the design and the like as long as they do not depart from the technical idea according to the present invention other than the embodiments described above.

DESCRIPTION OF SYMBOLS 1 Portable display apparatus 2 Display part 4 Operation part 8 Memory card 11 Computer apparatus 12 Connection cable 13 Display 102 RAM
103 EEPROM
104 Key input I / F
106 Memory card I / F
107 Communication I / F
109 Control Unit 110 Information Input Unit 202 RAM
203 Communication I / F
204 Information input I / F
208 Control unit 211 Information input unit 212 Display unit

Claims (9)

In a computer device that displays information on data stored in the memory by communicating with a portable display device that displays information on data stored in the memory,
A control unit;
A display unit;
An information input unit for inputting information;
A communication interface for transmitting and receiving data to and from the portable display device;
A storage unit for storing the information of the personal identification number,
In the memory, a secure area for storing encrypted data and a non-secure area for storing unencrypted data are formed,
The controller is
A first process for determining whether or not the information of the personal identification number is stored in a predetermined storage area of the portable display device when connected to the portable display device via the communication interface;
When it is determined that the personal identification number information is stored in the predetermined storage area of the portable display device, the personal identification number information is read from the predetermined storage area, stored in the storage unit, and stored in the predetermined storage area. A second process for erasing the stored password information;
A third process for decrypting the encrypted data stored in the memory based on the information of the personal identification number stored in the storage unit;
And a fourth process of displaying the data decrypted in the third process on the display unit.   When there is a request to browse the secure area of the memory by an operation on the information input unit, if the password information is not stored in the storage unit, a display prompting the input of the code number is performed on the display unit. 5. The computer apparatus according to claim 1, wherein five processes are executed.   When it is detected that a request for disconnecting communication with the portable display device has been made by an operation on the information input unit, if information on a personal identification number is stored in the storage unit, the information is stored via the communication interface. The computer apparatus according to claim 2, wherein a sixth process of storing the information of the personal identification number stored in the unit in the predetermined storage area of the portable display device is executed.   The program which makes the control part of the said computer apparatus of any one of Claims 1-3 perform each said process. In a portable display device that displays data information stored in a memory and that can read information stored in the memory from an external computer device.
A control unit;
A display unit;
A memory interface for reading data stored in the memory;
A communication interface for transmitting and receiving data to and from the computer device;
An information input unit for inputting information;
A storage unit for storing information of a personal identification number,
In the memory, a secure area for storing encrypted data and a non-secure area for storing unencrypted data are formed,
The controller is
When there is a request for browsing the secure area of the memory by the information input unit, if the information on the code number is not stored in the storage unit, a display for prompting the input of the code number is performed on the display unit. Processing,
A second process for storing the input password information in the storage unit when the password information is input from the information input unit;
A third process of decrypting the encrypted data stored in the secure area of the memory according to the information of the password entered from the information input unit;
A fourth process for displaying the data decrypted in the third process on the display unit;
When communication with the computer device via the communication interface is established and then the communication is disconnected, if information on a personal identification number is stored in the storage unit, the display unit stores the secure area of the memory. A fifth process for displaying a selection request screen for selecting whether to enable display of encrypted data;
In the state where the selection request screen is displayed on the display unit, when there is a selection operation for enabling the encrypted data in the secure area to be displayed by the information input unit, the information on the personal identification number is stored in the storage unit. Performing a sixth process of erasing the information of the personal identification number from the storage unit when there is a selection operation for maintaining the storage and not allowing the encrypted data in the secure area to be displayed by the information input unit. A portable display device characterized by the above.   In the sixth process, when a selection request for enabling the encrypted data in the secure area to be displayed by the information input unit in a state where the selection request screen is displayed on the display unit, the secure area of the memory The portable display device according to claim 5, wherein a title list of encrypted data stored in the display unit is displayed on the display unit. A second storage unit for storing information of the personal identification number;
In the second process, information on a personal identification number input from the information input unit is stored in the second storage unit,
In the third process, decryption of the encrypted data is performed based on the information of the personal identification number stored in the second storage unit,
In the fifth process, when communication with the computer device via the communication interface is established and then the communication is disconnected, if the information on the personal identification number is stored in the storage unit, the personal identification number The number information is stored in the second storage unit and the password information is erased from the storage unit,
Furthermore, when communication with the said computer apparatus via the said communication interface is established, the 7th process which erase | eliminates the information of the PIN code memorize | stored in the said 2nd memory | storage part is performed. The portable display device described in 1. In a portable display device that displays data information stored in a memory and that can read information stored in the memory from an external computer device.
A control unit;
A display unit;
A memory interface for reading data stored in the memory;
A communication interface for transmitting and receiving data to and from the computer device;
An information input unit for inputting information;
A storage unit for storing information of a personal identification number,
In the memory, a secure area for storing encrypted data and a non-secure area for storing unencrypted data are formed,
The controller is
When there is a request for browsing the secure area of the memory by the information input unit, if the information on the code number is not stored in the storage unit, a display for prompting the input of the code number is performed on the display unit. Processing,
A second process for storing the input password information in the storage unit when the password information is input from the information input unit;
A third process of decrypting the encrypted data stored in the secure area of the memory according to the information of the password entered from the information input unit;
A fourth process for displaying the data decrypted in the third process on the display unit;
When communication with the computer device via the communication interface is established and then the communication is disconnected, if the password information is stored in the storage unit, the encryption stored in the secure area of the memory A portable display device that performs a fifth process of decrypting data and displaying the decrypted data on the display unit. In a display system comprising a portable display device that displays information on data stored in a memory and a computer device that communicates with the portable display device and displays information on data stored in the memory,
In the memory, a secure area for storing encrypted data and a non-secure area for storing unencrypted data are formed,
The portable display device includes:
A control unit;
A display unit;
A memory interface for reading data stored in the memory;
A communication interface for transmitting and receiving data to and from the computer device;
An information input unit for inputting information;
A storage unit for storing information of a personal identification number,
The control unit of the portable display device includes:
When there is a request for browsing the secure area of the memory by the information input unit, if the information on the code number is not stored in the storage unit, a display for prompting the input of the code number is performed on the display unit. Processing,
A second process for storing the input password information in the storage unit when the password information is input from the information input unit;
A third process of decrypting the encrypted data stored in the secure area of the memory according to the information of the password entered from the information input unit;
And a fourth process for displaying the data decoded in the third process on the display unit,
The computer device includes:
A control unit;
A display unit;
An information input unit for inputting information;
A communication interface for transmitting and receiving data to and from the portable display device;
A storage unit for storing the information of the personal identification number,
The control unit of the computer device includes:
A first process for determining whether or not information on the personal identification number is stored in the storage unit of the portable display device when connected to the portable display device via the communication interface;
When it is determined that the personal identification number information is stored in the storage unit of the portable display device, the personal identification number information is read from the storage unit of the portable display device and stored in the storage unit. A second process of erasing information of a personal identification number stored in the storage unit of the portable display device;
A third process for decrypting the encrypted data stored in the memory based on the password information included in the password information stored in the storage unit;
And a fourth process for displaying the data decrypted in the third process on the display unit.

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