JP7385838B2 - Information terminal equipment - Google Patents

Description

The present invention relates to an information terminal device, such as a keyboard for inputting characters into a computer or a mouse for inputting positional information, in which a predetermined character string is automatically and safely and accurately input by the user by switching modes. The present invention relates to an information terminal device that can input information to a computer.

Conventionally, when using a computer, it is often necessary to enter various confidential information such as passwords and credit card numbers. Especially recently, from a security perspective, people are using different passwords to avoid reusing them, and the number of password types has inevitably increased. Simply thinking, it is convenient to list and manage these on your computer, and some sites actually encourage you to save your passwords on a system on the Internet. However, if confidential information is entered into a computer system, there is a risk that it may be hacked by spyware or the like and leaked to the outside world, so it is generally considered to be something to be avoided. Currently, there are Internet services that store encrypted passwords on the cloud, but even with these services, there have been incidents where passwords have been visible from the outside, so it is still dangerous to have them on a computer system. There is.

It is impossible for people to memorize all of the ever-increasing number of passwords, etc., so they usually write them down on paper and type them into a computer while looking at them, or use a removable device such as a USB memory. Currently, passwords are written in rewritable memory and used by connecting it to a computer only when necessary.
However, in any case, passwords are entered manually, and passwords gradually become longer and more complex, requiring a mix of uppercase and lowercase letters as well as numbers, and frequent use of the shift key on the keyboard. There were many input errors, and in the worst case scenario, there was a risk that the site would be locked due to a series of input errors.

The present invention was invented to solve these problems, and its purpose is to provide an information equipment terminal that can automatically input important character strings such as passwords and credit numbers into a computer while maintaining high security. It is about providing. The present invention also provides a method of encrypting the confidential information so that it cannot be read even if the memory in which these important character strings are recorded falls into the hands of another person due to loss or theft.

The information terminal device according to the present invention uses rewritable memory such as a commercially available USB memory or SD memory card (registered trademark) in which important character strings such as passwords and credit numbers are recorded. By placing the memory outside the memory map of the computer system and using it as the local memory of the information equipment terminal, passwords and the like can be automatically input into the computer without errors. Furthermore, even if these memories are lost or stolen and fall into the hands of another person, the decryption key for decrypting the encrypted secret information can be stored in the non-volatile memory inside the information terminal device according to the invention. It also provides a method to prevent encrypted confidential information from being read by recording it.

1 is a diagram of a computer system of the present invention; FIG. FIG. 1 is a circuit configuration diagram of a keyboard according to the present invention. FIG. 2 is a diagram of an input window appearing on a computer screen. This is an example of an input item table. (Gmail, Amazon, and Rakuten are registered trademarks.) This is an example of an overall table. It is a figure of the input window after automatically transmitting a character string. This is an example of an input item table with holders. This is an example of a hierarchically displayed input item table. (VISA and JCB are registered trademarks.) This is an example of a hierarchically displayed overall table. FIG. 1 is a diagram of a mouse according to the invention. FIG. 1 is a circuit configuration diagram of a mouse according to the present invention. FIG. 2 is a diagram of a mouse with multiple mode switching buttons. This is the entire encrypted table. It is a flowchart when a USB memory is attached to a keyboard. This is data recorded on a computer, USB memory, or keyboard.

FIG. 1 is a diagram illustrating an embodiment of the usage environment of the present invention, which is similar to a normal computer system and is composed of a computer 1, a keyboard 2, and a mouse 3. In FIG. 1, the computer device is a general desktop computer, but the computer device in the present invention is not limited to a desktop computer, but also includes devices with computer functions such as portable computers, tablet computers, and smartphones. It means general.

Below, we will first explain the case where the present invention is applied to the keyboard 2. However, the keyboard 2 may be of any type, whether wired or wireless, as long as it can send normal character information to the computer. , a touch panel or digitizer may be used. Note that in the following description, the computer 1 is a general computer consisting of a CPU, ROM, RAM, and a large-capacity storage device such as an HDD, and a detailed explanation will be omitted. For example, a USB port 14 is provided.

FIG. 2 shows a circuit diagram of a keyboard 2 according to the present invention, which is almost the same as an ordinary keyboard, but is equipped with a USB port 24 for attaching and detaching a rewritable memory. In this embodiment, the rewritable memory is the USB memory 5, but any removable rewritable memory may be used, for example, an SD memory card or the like may be used. Also, keyboards with USB ports are commercially available as having a kind of hub function, but the USB port is connected to the computer's system bus, and the computer can access the rewritable memory attached to the USB port. It looks like it can be done. In contrast, in the present invention, the USB memory 5 is a local memory of the keyboard 2, as shown in FIG. 2, and is characterized by being located outside the memory map of the computer 1.

The present invention records a plurality of input items and character strings such as a plurality of passwords corresponding to them in the USB memory 5 as a local memory, and when the user selects an input item from among them using a selection means, the corresponding input item is processed. automatically sends the character string to the computer 1.

In FIG. 2, the keyboard 2 according to the present invention receives data from the CPU 20, a key input means 270 for the user to input characters by hitting keys, a key input detection means 260 for detecting this key input, and a computer 1. The USB memory 5 includes a data receiving means 250, a data transmitting means 251 for transmitting data to the computer 1, and a nonvolatile memory 29 such as a ROM 27, a RAM 28, and a flash memory connected by an internal bus 280. If it is attached to the USB port 24, it is commonly connected to these via an internal bus 280. The data that the data receiving means 250 receives from the computer 1 is mainly an initialization signal when the keyboard 2 is activated, and after the connection with the computer 1 is established, the data that the data transmitting means 251 sends to the computer is The main packet signals include various character codes from 2 onwards.

In the present invention, the keyboard 2 may be of either a wired type or a wireless type. Note that there is a power control unit as a component not shown in FIG. 2, and in the case of a wireless system, a booster circuit for driving batteries and semiconductors, and a high frequency circuit for wireless communication are also added.
The CPU 20 expands the control program stored in the ROM 27 into the program area of the RAM 28 and executes processing for controlling each part of the keyboard 2. However, as described later, the CPU 20 expands the control program stored in the ROM 27 into the program area of the RAM 28 and executes processing for controlling each part of the keyboard 2. A list of these is generated from the records in which the character strings are associated with each other, and control is also executed to automatically transmit desired character strings to the computer 1 in accordance with the user's selection in the second mode.

In addition, in order for the computer 1 to know the contents of the USB memory 5, it is necessary to read them through the CPU 20 of the keyboard 2, but the CPU 20 of the keyboard 2 can perform routine processing by the program in the ROM 27 in both the first mode and the second mode. Since the memory contents at an arbitrary address are not transmitted to the computer 1, the memory contents at an arbitrary address are not transmitted to the computer 1. Therefore, even if the computer 1 is connected to the Internet, there is no risk of the contents of the USB memory 5 attached to the USB port 24 being leaked to the outside due to hacking.

Hereinafter, in order to understand the principle of the information terminal device according to the present invention, how to use it will first be explained. Suppose that while the user is using the computer 1 using the keyboard 2 and mouse 3, a screen as shown in FIG. 3 appears and prompts the user to input a password or the like into the input window 6. In this case, conventionally, after setting a cursor on the input window 6 using a mouse or the like, a character string such as a password is manually input using the key input means 270. On the other hand, when using the keyboard 2 of the present invention, it is the same as the conventional keyboard up to the point where the cursor position is specified as the input position, and hereinafter this will be referred to as the first mode as the normal keyboard usage.

Thereafter, when the user presses the function key 21 of FIG. 1 previously assigned on the keyboard 2 as a mode switching means, the CPU 20 changes the control of the keyboard 2 to the second mode in which the character string is automatically sent to the computer 1. Switch. On the other hand, when the computer 1 detects this switching signal, it pops up a list of a plurality of input items as shown in FIG. This list is a list of input items where the user enters important character strings such as passwords, and was created exclusively for that user.Hereafter, this list will be referred to as the input item table. do. Note that the method for creating the input item table will be described later.

On the other hand, in the RAM 28 of the keyboard 2, a table as shown in FIG. 5 is generated that includes a plurality of input items and character strings such as a plurality of passwords associated therewith. The list shown in FIG. 5 will be referred to as an overall table hereinafter, and a method for creating an overall table will be described later. Although the overall table is conceptual, it completely corresponds to the input item table pop-up displayed on the display screen 11 of the computer 1 in Fig. The character string such as the password that you want to enter is recorded. However, unlike the list in FIG. 4, the list in FIG. 5 is generated in the RAM 28 of the keyboard 2, and is not visible to humans from the outside. Therefore, although names of input items and ruled lines are not necessary in the actual overall table in the RAM 28, they will be left as they are and explained below for ease of understanding.

Here, the user operates the up and down cursor movement keys 22 of the keyboard 2 in FIG. 1 as means for selecting an input item while looking at the input item table popped up on the display screen 11 of the computer 1. When the user presses the cursor movement key 22, the CPU 20 of the keyboard 2 sends the line number currently held by the keyboard 2 in the overall table of FIG. 5 to the computer 1, and the computer 1 receives this and pops up The displayed line of FIG. 4 with the same line number is highlighted. Examples of highlighting include changing the color of the line or overlapping halftone dots, but it is also possible to use arrows to point to the line. This highlighting allows the user to identify which input item he or she has selected, so the user can press the cursor movement key 22 to change the row number in the overall table in FIG. When the desired input item is highlighted, the function key 21 for mode switching is pressed again.

Then, the CPU 20 of the keyboard 2 reads the character strings such as passwords on the right side of the table associated with the input items, and sends the code signals of the character strings to the computer 1 in order as if the user were typing on the keyboard. Transmission is performed at a report rate that does not overload the computer 1. That is, if the character string to be transmitted, such as a password, is 8 characters, 8 characters will be transmitted continuously, and if the character string is 20 characters, 20 characters will be transmitted continuously. In this case, as will be described later, the character string may include not only normal characters but also control signals such as the TAB key.

When the character string has been transmitted, the mode of the keyboard 2 automatically returns to the normal first mode, and the computer 1 is set to erase the pop-up display on the display screen 11 when it receives the mode switching signal again. Therefore, at this time, the display screen 11 of the computer 1 is in the same state as if the user had finished entering the password by typing on the keyboard 2, as shown in FIG. 6, so the user presses the enter key on the keyboard 2. By pressing the send button 7 on the display screen 11 with the mouse 3, the password and the like may be sent. If you press the mode switching function key 21 by mistake, or if you want to cancel the password entry process midway through, select the cancel line in the last line of Figure 4 and then press the mode switching function key 21. , the mode simply returns to the first mode and is set to not have executed anything. Note that an appropriate default value may be determined for the line number that the keyboard 2 initially has. Further, in the above example, the cursor movement key 22 is operated to select an input item, but the input item may be selected by directly inputting a line number using the numeric keypad shown in FIG.

Next, a method of creating the input item table shown in FIG. 4 and the overall table shown in FIG. 5 will be explained. These are created using a user interface that is an add-in (plug-in) to existing spreadsheet software or word processing software on the computer 1. First, the user inserts the USB memory 5 into the USB port 14 of the computer 1. Next, the user inputs a plurality of input items and a plurality of character strings associated with them to create the overall table shown in FIG. 5. Although this list is confidential information, it is present on the computer 1 only temporarily while the overall list is being created, so there is no problem. After the entire table of FIG. 5 is completed, the user instructs the user interface to write the entire table of FIG. 5 to a predetermined address of the USB memory 5. However, since the list shown in FIG. 5 is in a format that the user can see and understand, it is reconfigured so that it can be easily processed by the CPU 20 of the keyboard 2 and written to the USB memory 5.

On the other hand, computer 1 saves only the input item table of the input item part of the entire table of FIG. 5, that is, only FIG. Erase everything to prevent this.

Next, the user removes the USB memory 5 in which the list corresponding to FIG. 5 is written as described above from the USB port 14 of the computer 1 and inserts it into the USB port 24 of the keyboard 2. When the CPU 20 of the keyboard 2 detects the attachment of the USB memory 5, it writes the entire table of FIG.

In this case, the USB memory 5 is reused when changing or modifying the list shown in Figure 5, but the contents are confidential information itself, and if it is lost or stolen and falls into the hands of another person, it can be decoded. Therefore, proper storage management is required. Note that as a countermeasure against this, the contents of the USB memory 5 can be encrypted, but this will be described later.

Next, an example in which a list of input items is displayed hierarchically will be described with reference to FIG. 7A. In Figure 4, all input items are displayed, but as the number of input items increases, it becomes difficult for the user to find the required input item from among them. Therefore, as shown in FIG. 7A, frequently used input items are placed at a higher level so that they can be viewed directly, and other input items are created in folders by category, resulting in a two-level hierarchical display. When displaying folders, change the color of the line, the border frame, etc. so that you can clearly see that it is a holder. In this case, when the user first presses the function key 21 for mode switching, the list shown in FIG. 7A is first popped up on the display screen 11. If the user selects the input items in line numbers 1 to 4, as explained above, but if the user selects the credit card holder in line number 7 and presses the function key 21 again, the keyboard The CPU 20 of No. 2 switches the pop-up display to FIG. 7B without transmitting the character string to the computer 1. For example, FIG. 7B shows a list of input items for credit cards, from which the user selects a desired input item using the up and down cursor movement keys 22, and then performs the same operations as described above.

In order to display the hierarchy, the multiple input items and the associated overall table (Figure 5) have the same hierarchical display configuration as in Figures 7A and 7B, but in this case, Figure 8 FIG. 2 is a conceptual diagram of an overall table developed in the RAM 28 of the keyboard 2 of FIG. The card number of the credit card selected by the user is the character string to be sent to the computer 1, and the CPU 20 of the keyboard 2 sends it as described above. However, credit card numbers are usually 16 digits long, and the input window required by Internet sites is often 4 digits at a time, but there are some that require 16 digits to be entered consecutively, so in order to accommodate these, you can use the same credit card number. It is convenient to prepare two types of card numbers: one with a TAB key (represented by a black circle in FIG. 8 for convenience) and one without a TAB key. In this way, since the input patterns for frequently used Internet sites are fixed, usability can be improved by storing character strings including control keys.
Note that in the above example, the hierarchy display is in two stages, but it is also possible to display in three or more stages.

Although the above embodiments have been described in which the information terminal device of the present invention is a keyboard, the present invention can also be applied to a mouse, which is an information terminal device for position input. In recent years, the mouse has come to be increasingly used as a computer user interface. In particular, when the present invention is applied to a mouse, it is more convenient because it can be operated with only one hand without moving the arm.
FIG. 9 shows an example of the mouse 3 according to the present invention, and FIG. 10 is a circuit configuration diagram thereof. The mouse 3 is equipped with a right switch 33, a left switch 34, an SD memory card 36, and the like. In the mouse 3, an SD memory card 36 is used as a removable and rewritable memory for miniaturization, but a USB memory can also be used. Note that if an SD memory card is used, the computer 1 must also have an SD memory card port. Although the indicator 35 indicates mode switching, it can be omitted since the aforementioned pop-up display also serves the purpose of the mouse 3. In the case of the mouse 3, instead of the function key 21 of the keyboard 2, a mode switching button 31 is provided on the side of the mouse at an appropriate position for easy operation. Furthermore, wheel rotation position information is transmitted to the CPU 30 of the mouse from a wheel 32 that is also included in a normal mouse. The basic operating principle of the mouse 3 of the present invention is the same as that of the keyboard 2 described above, and the function key 21 and vertical cursor movement key 22 of the keyboard 2 are replaced with the mode switching button 31 and wheel 32 of the mouse 3, respectively. Just think about it.

That is, when a user inputs a desired password or the like into the computer 1, the user first presses the mode switching button 31 to switch the mode from the first mode to the second mode. Then, in response to this mode switching signal, the computer 1 pops up the input item table shown in FIG. 4 on its display screen 11. By turning the wheel 32 back and forth, the user can highlight the desired position in FIG. Then, by pressing the mode switching button 31 again, the character strings associated with the input items are automatically transmitted to the computer 1. However, in this case, it is necessary to convert the character string transmission data to the keyboard key transmission data, but this involves converting the model ID signal and baud rate of the packet signal transmitted by the mouse 3 to that of the keyboard 2. This technology is similar to that used in hard macro mice for gaming devices.

FIG. 11 shows the specifications of different mouses 3. In this case, on the premise that the user remembers the line number of the input item table (Figure 4) of the character string to be sent, the input item table is not displayed as a pop-up, and multiple mode switching buttons 311 are provided to Characters to be directly transmitted are selected and transmitted by associating line numbers with each other. As a result, the user can omit the operation of selecting a character string and the second operation of switching modes, and can perform processing more quickly. Although this is similar to a hard macro mouse for game machines, the mouse according to the present invention has the advantage that it can be easily changed to a mouse with different specifications by simply replacing the SD memory card 36. Note that if the user presses the mode switching button 311 without looking at the input item table display, it is easy to make a mistake, so one of the multiple mode switching buttons 311 pops up the input item table and selects a character string from it. Alternatively, the character string may be selected using the wheel, and the remaining mode switching buttons may be used to directly select and transmit the character string.

Next, a method for jointly using the information terminal device according to the present invention in the computer system environment shown in FIG. 1, and encrypting the entire table (FIG. 5) recorded in a removable and rewritable memory. Explain how. In the following explanation, the keyboard 2 is assumed to be an information terminal device, and the removable rewritable memory is assumed to be a USB memory 5, but of course, the information terminal device may be the mouse 3, and the removable rewritable memory may be an SD memory card 36.

First, when a user creates an overall table (FIG. 5) for the first time, the user launches the user interface, determines an ID identifier, and then creates the overall table (FIG. 5) using the spreadsheet function of the add-in software. Here, the ID identifier only needs to be unique, and may be, for example, a combination of six digit numbers and alphabetic characters, and may be given to the user by the computer 1 side. Next, the user interface prompts the user to enter a password consisting of a combination of six digit numbers, uppercase letters, and lowercase letters. This password can be thought of as a pattern of 48 bits of 0 and 1 (8 bits x 6 characters), and is used as a decryption key using exclusive OR as described later.

After the overall table is completed, the user instructs the computer 1 to use a command on the user interface to create an input item table (Fig. 4) in which only the table of input items is separated from the overall table. The ID identifier is stored and registered at a predetermined address in the gender memory in association with the ID identifier. Thereafter, the computer 1 performs an exclusive OR with the string code using the 48-bit encryption key (composite key) for at least the string portion of the overall table (Figure 5), and uses the result to sequentially all the strings. replace. FIG. 12 shows a table created in this way, which will hereinafter be referred to as the entire encrypted table. Note that in this table, the # mark indicates an encrypted character string for convenience, and is actually not the same character but a random character. The computer 1 records this entire encrypted table (FIG. 12) together with the ID identifier and the decryption key (encryption key) at a predetermined address in the USB memory 5. After this, the computer 1 completely erases the entire table, encrypted entire table, and decryption key (cipher key) remaining in the memory of the computer 1.

Thereafter, the user removes the USB memory 5 in which the ID identifier, the entire encryption table (FIG. 12), and the ID identifier are recorded from the USB port 14 of the computer 1 and inserts it into the USB port 24 of the keyboard 2. This will be explained below along with the flowchart of FIG. The CPU 20 of the keyboard 2 detects the attachment of the USB memory 5 and checks whether there is an ID identifier in it (S101). If there is no ID identifier, the CPU 20 sends an error signal to the computer 1, and the computer 1 performs processing such as a warning in response. If there is an ID identifier and a decryption key, the CPU 20 recognizes the recorded encrypted overall table (FIG. 12) as a new one.

Then, the ID identifier and the decryption key are recorded in the non-volatile memory 29 of the keyboard 2 (S103), and then the CPU 20 erases the decryption key recorded in the USB memory 5 (S104). That is, the CPU 20 takes the decryption key from the USB memory 5 and transfers it to the nonvolatile memory 29. Thereafter, the encrypted entire table is decrypted by exclusive ORing the character portions of the entire encrypted table using the decryption key, and the entire table (FIG. 5) is reconstructed and developed in the RAM 28 of the keyboard 2 (S105).

To summarize the above, assuming that there are N users who share the keyboard 2 according to the present invention, the data recorded in each of the computer 1, USB memory 5, and keyboard 2 in this state is as shown in FIG.
What is important here is that neither the computer 1 nor the keyboard 2 can reproduce the entire table (FIG. 5) by themselves, and the USB memory 5 is always required for reproduction. In addition, the character string part of the encrypted entire table in the USB memory 5 is encrypted, so even if someone else obtains it and does not know the user's password, the entire encrypted table with the character string part will be lost even if it is connected to the computer 1. Tables cannot be played back. If the user forgets the password, no one will be able to reconstruct the entire table, so care must be taken, such as recording it on paper. Note that the overall table developed in the RAM 28 of the keyboard 2 is not visible from the outside and disappears unless power is supplied thereto.

When the user wants to modify or update his or her overall table, the user inserts the USB memory 5 that is already in use into the USB port 14 of the computer 1, and the computer 1 detects this and stores the registered ID in it. It is checked whether an identifier is included or not. If not, it is a new creation and the above-mentioned process is performed. If there is a registered ID identifier, the computer 1 recognizes that the entire table is being corrected or updated, and prompts the user to input a password (decryption key). Then, when the user enters the password, the computer 1 reconstructs the overall table (FIG. 5) by performing an exclusive OR and allows it to be edited on the user interface. After the user has finished editing the corrections and updates, computer 1 overwrites the updated encryption overall table (Figure 12) in the USB memory 5 using the same procedure as when creating a new one, and also transfers the decryption key to the USB memory 5 again. write to.

If the user reinstalls the USB memory 5 that has been used once into the USB port 24 of the keyboard 2, the CPU 20 will not be able to find it because the decryption key has been erased even if it recognizes the ID identifier (see Figure 13). S102), the CPU 20 recognizes that the USB memory 5 is being reused, reads out the decryption key recorded in association with the ID identifier of the USB memory 5 from the nonvolatile memory 29, performs exclusive OR, and creates the entire encryption table (Fig. 12), the entire table (FIG. 5) is reconstructed in the RAM 28 (S105 in FIG. 13). This allows the user to easily use the second mode function of the keyboard 2 without entering a password.
Note that when a user logs in to computer 1, computer 1 can generate an input item table (Figure 4) that is associated with the user's ID identifier in advance, so the input items used on computer 1 can be created in advance. The item table (FIG. 4) and the overall table (FIG. 5) used by the keyboard 2 are associated with the same ID identifier.

As a security measure for USB memories, password-protected USB memories are commercially available, but when using them in the present invention, there is a process of entering the password after attaching them to the keyboard 2 and mouse 3 according to the present invention. A necessary problem arises. In the present invention, apart from the password for logging into the computer 1, the password (decryption key) for the USB memory 5 is only required when creating a new one, modifying or updating, and no prior procedures are required. It is. In the above embodiment, exclusive OR was used as the encryption method, but other encryption methods may be used as long as decoding using a composite key is possible.
Further, in the above embodiment, only the character string is encrypted, but it is also possible to encrypt the entire text including the input item portion.

Effect of the invention

The recorded contents of the USB memory, etc. used in the information terminal device according to the present invention are a collection of confidential information that is linked to the user's personal internet sites and their passwords, but this can be managed securely on a computer. It can be used as is.
By receiving the password (decryption key) to your heirs, you can ensure that your digital assets, which tend to go unknown, can be passed on to your heirs.

In the above explanation, we have mainly explained the transmission of highly confidential character strings such as passwords and credit card numbers, and the encryption and decryption of the USB memory or SD memory card that stores them. Internet sites often have an auto-fill function for low-confidence ID numbers, but other ID numbers, telephone numbers, etc. can also be selected as the character strings of the present invention. For example, in the example of the mouse for a game machine mentioned above, the character string recorded on the SD memory card is not a character string in the ordinary sense, but this also belongs to the scope of the present invention.

Although the information terminal device according to the present invention has a new function of automatically transmitting character strings, it does not require any special parts, and the number of parts does not increase compared to commercially available keyboards and mice. There is no major cost increase in clothing.

1 Computer 11 Display screen 14 USB port 2 Keyboard 3 Mouse 31 Mouse mode switching button 32 Wheel 311 Novus multiple mode switching button 36 SD memory card 5 USB memory 20 CPU
21 Function key 22 Cursor movement key 24 USB port 25 Numeric keypad 27 ROM
28 RAM
29 Non-volatile memory

Claims (4)

An information terminal device that transmits character information or location information to a computer device having a display screen , the information terminal having a removable rewritable memory in which a plurality of input items and a plurality of character strings are recorded in correspondence with each other, and the information terminal device A first mode and a second mode can be switched by a mode switching means provided in the device . In the first mode, character information or position information is manually transmitted to the computer device, and in a second mode, the plurality of A list of input items is displayed as a pop-up on the display screen, and the user selects one input item using a character information input means or a position information input means provided in the information terminal device. An information terminal device characterized in that a character string associated with one input item is automatically transmitted to the computer device. A list is generated in which the plurality of input items are associated with a plurality of character strings, and when it is detected that the mode of the information terminal device has switched from the first mode to the second mode, the list of the plurality of input items is generated. 2. The computer device of claim 1, further comprising displaying a table as a pop-up on the display screen, and further highlighting the selected input item . The information terminal device is a wired or wireless keyboard or mouse, and in the case of a mouse, when transmitting the character string to the computer device, the transmitted data is converted into keyboard transmitted data. The information terminal device according to claim 1. The information terminal device according to claim 1, wherein the computer device is a tablet computer or a smartphone.

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