JP2022160180A - Information processing apparatus and control method for the same and program - Google Patents

Abstract

To make it possible, in an information processing apparatus, to detect wrong input in a user ID input field in a short time and notify a user of the wrong input.SOLUTION: A list of character strings with a specified text length extracted from a plurality of user IDs registered for user authentication, the list used for grouping and managing user IDs, of the plurality of user IDs, which are common in portions of the character strings with the specified text length starting from a specified character position in the character strings indicating the user IDs, is stored in a RAM. An information processing apparatus detects input of a character string not matching any character strings included in a grouping list as input to a user ID input field on an authentication screen. When detecting input of the character string not matching any character strings included in the grouping list, the information processing apparatus notifies a user of occurrence of wrong input of a user ID.SELECTED DRAWING: Figure 6

Description

The present invention relates to an information processing apparatus, its control method, and a program.

An information processing device such as a PC displays an input screen having input fields for a user to input authentication information such as a user ID and a password required for user authentication, and allows the user to input the authentication information via the input screen. Input may be accepted. If an incorrect password is entered in the password entry field on such an entry screen, user authentication will fail. In that case, the user has to re-enter the password, for example. In Patent Document 1, it is determined whether or not the password is correct based on a hash value calculated from the input password, and a different display is displayed according to the determination result, thereby preventing incorrect input of the password before confirming the input. describes a technique for notifying the user.

JP 2012-141870 A

According to the conventional technology as described above, it is possible to detect an erroneous entry in the password entry field, but it is not possible to detect an erroneous entry in the user ID entry field. For this reason, for example, if the user erroneously enters a password in the user ID entry field, there is a possibility that the entered password may be seen by others. Further, in order to detect erroneous input of a user ID, when determining whether or not an input character string matches each registered user ID, the greater the number of registered user IDs, the longer it takes to determine. It will take.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an information processing apparatus that detects an erroneous input in a user ID input field in a short period of time and notifies the user of the erroneous input.

An information processing apparatus according to an aspect of the present invention is a list of character strings of a specified number of characters extracted from a plurality of user IDs registered for user authentication, and indicating a user ID among the plurality of user IDs. storage means for storing the list used for grouping and managing user IDs having a common character string portion of the specified number of characters starting from the specified character position in the character string; and a user ID for inputting the user ID. receiving means for displaying an operation screen having an input field and a password input field for inputting a password on a display unit of the information processing apparatus and receiving a user's input via the operation screen; As an input to the user ID input field, detection means for detecting input of a character string that does not match any character string included in the list, and input of a character string that does not match any character string included in the list are used. and notification means for notifying the user that an erroneous input of the user ID has occurred when detected by the detection means.

According to the present invention, an information processing apparatus can detect an erroneous input in a user ID input field in a short period of time and notify the user of it.

FIG. 2 is a block diagram showing an example hardware configuration, an example functional configuration, and an example of data stored in a RAM of an information processing apparatus; A diagram showing an example of an authentication screen displayed on a display device Flowchart showing the procedure for setting the grouping rule Flowchart showing a procedure of user ID registration processing Flowchart showing the procedure of user ID deletion processing Flowchart showing the procedure of input determination processing Diagram showing an example of a warning window displayed on a display device

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more of the features described in the embodiments may be combined arbitrarily. Also, the same or similar configurations are denoted by the same reference numerals, and redundant explanations are omitted.

<Information processing device>
FIG. 1A shows a hardware configuration example of an information processing apparatus according to the first embodiment of the present invention. The information processing apparatus of this embodiment is a user terminal used by a user, such as a PC, a smart phone, or a tablet terminal. Note that the information processing device may be a device other than the user terminal, and may be, for example, an image forming device or an image processing device such as a printer or multifunction peripheral (MFP).

The information processing apparatus 100 includes a CPU 101 , a RAM 102 , an input device 103 , a communication interface (I/F) 104 , a storage device 105 and a display device 106 . The CPU 101 reads the control program stored in the storage device 105 to the RAM 102 and executes it, thereby controlling the operation of each device in the information processing apparatus 100 . The RAM 102 stores various programs such as a control program for the information processing apparatus 100 and various data such as image data. For example, registration data of a user ID and a password (user information) for user authentication are stored in the RAM 102 . The storage device 105 stores in advance a control program, an OS (operating system), various programs such as application programs, device drivers, and the like of the information processing apparatus 100 . The storage device 105 may be a nonvolatile storage device such as a magnetic storage device (hard disk drive (HDD), etc.), a semiconductor storage device (solid state drive (SSD), etc.), or an optical storage device (optical disk, etc.).

The input device 103 is composed of a device such as a mouse, a keyboard, and a touch panel for the user to input information. The communication I/F 104 may be composed of any of USB I/F, serial I/F, parallel I/F, and network I/F. In this embodiment, the communication I/F 104 is a network I/F that is connected to a network such as a wired LAN or wireless LAN, and performs communication with an external device (for example, an external database and an authentication control device) via the network. Configured. The display device 106 is a display unit configured by a liquid crystal display or the like, and is used to display various information, operation screens, and the like.

FIG. 1B shows an example of the functional configuration of the information processing apparatus 100 and an example of data stored in the RAM 102, and relates to input reception processing using the input device 103 and the display device 106 in this embodiment. shows what to do.

In this embodiment, the CPU 101 functions as a registration processing unit 151 , an authentication processing unit 152 , and a display control unit 153 by reading and executing control programs stored in the storage device 105 . The registration processing unit 151 has a function of updating a grouping list, which will be described later, when registering or deleting a user ID. The authentication processing unit 152 has a function of accepting input of authentication information (user ID and password) and performing user authentication based on the input authentication information, and implements an authentication system in the information processing apparatus 100 . The display control unit 153 has a function of controlling screen display of the display device 106 .

The CPU 101 of this embodiment retains in the RAM 102 registration data registered in advance in the authentication system as user information (user ID and password) used for user authentication. Further, in this embodiment, a list of multiple user IDs corresponding to multiple users is held in the RAM 102 as an ID list. Each user ID is associated with a corresponding password. The registration data of the user information may be read out from the storage device 105 and held in the RAM 102 , or may be acquired from an external database via the communication I/F 104 and held in the RAM 102 .

The information processing apparatus 100 inputs authentication information (user ID and password) via the input device 103 and the display device 106, for example, when user authentication is required when logging in (signing in) to a predetermined service. Accept input. When accepting input of authentication information for user authentication, the authentication processing unit 152 causes the display control unit 153 to display an operation screen for the user to input the authentication information on the display device 106 .

FIG. 2 shows an authentication screen 201 used for inputting authentication information for user authentication, as an example of an operation screen displayed on the display device 106 by the display control unit 153 . The authentication screen 201 has a user ID entry field 202 and a password entry field 203 into which authentication information for user authentication can be entered. The user can use the input device 103 to sequentially input a character string representing a user ID into the user ID input field 202 character by character, and can input a character string representing a password into the password input field 203 character by character. be. The display control unit 153 converts each character input in the password input field 203 into a predetermined symbol (for example, "●" or "*") to hide the character input in the input field and displays it.

In the information processing apparatus 100, system rules are predetermined as rules for restricting entries in the user ID input field 202 and the password input field 203. FIG. In the present embodiment, as a system rule, a rule is defined that half-width alphabetic characters, numbers, or symbols can be input up to a predetermined number of characters.

The authentication screen 201 further has an OK button 204 and a cancel button 205 . When the OK button 204 is pressed, the authentication processing unit 152 (CPU 101) executes user authentication based on the user ID and password already entered in the user ID input field 202 and password input field 203. FIG. The authentication processing unit 152 determines that the user authentication has succeeded when the combination of the entered user ID and password matches any combination of the user ID and password registered as the user information for user authentication. Otherwise, the authentication processing unit 152 determines that user authentication has failed. Note that when the cancel button 205 is pressed, the authentication processing unit 152 terminates the display of the authentication screen 201 without executing user authentication.

<Grouping rule setting process>
FIG. 3 is a flow chart showing the procedure of grouping rule setting processing. The processing of each step in FIG. 3 is realized in the information processing apparatus 100 as processing by the CPU 101 (registration processing unit 151) when the CPU 101 reads the control program from the storage device 105 and executes it.

In this embodiment, in addition to the system rule described above, a grouping rule is further defined as a rule for input in the user ID input field 202 . The grouping rule is for grouping one or more user IDs using a character string of a specified number of characters starting from a specified character position in a character string indicating each user ID contained in a list of registered user IDs (ID list). is the rule. Specifically, according to a grouping rule, among a plurality of registered user IDs, one or more user IDs having a common portion of a specified number of characters starting from a specified character position in a character string indicating a user ID are grouped and managed. be. In the following description, the specified character position is the position of the first character in the character string indicating the user ID.

FIG. 3 shows an ID list 351 and grouping rules 352 as examples of the ID list and grouping rules. As shown in FIG. 3, the ID list 351 includes multiple user IDs registered in the authentication system. The grouping rule 352 includes setting items such as (1) whether or not to use grouping rules in user authentication by the authentication system (authentication processing unit 152); and (3) whether or not to allow automatic updating of the grouping list in response to addition or deletion of the user ID. The grouping rule 352 further includes a grouping list corresponding to a list of character strings of a specified number of characters extracted from a plurality of user IDs registered for user authentication by grouping processing according to the above settings.

The CPU 101 displays on the display device 106 an operation screen (GUI) for realizing processing according to the following procedure, and accepts settings from the user to perform setting processing, or to perform setting processing, or to perform setting processing according to the settings described in a setting file created in advance. Setting processing is performed according to the specified setting contents. Note that such a configuration file can be created by editing it with a text editor, for example. It should be noted that the setting and management of grouping rules should preferably be restricted so that only a limited number of users, such as system administrators or operations administrators within a company organization, can perform the setting and management.

When the grouping rule setting process is started, in S301, the CPU 101 determines whether or not to use the grouping rule according to the setting by the user, and sets the grouping rule according to the determination. The CPU 101 ends the process if the grouping rule is not used, and advances the process to S302 if the grouping rule is used. In S302, the CPU 101 sets the specified number of characters for grouping processing in the user ID for the grouping rule according to the setting by the user. The specified number of characters corresponds to the number of characters of a common part (common character string) to be extracted for grouping a plurality of user IDs (that is, the number of characters to be grouped), and is set to a value of 1 or more.

Next, in S303, the CPU 101 determines whether or not to permit automatic update of the grouping list according to the setting by the user, and sets the grouping rule according to the determination. The CPU 101 advances the process to S304 when permitting the automatic grouping list update, and advances the process to S305 when not permitting the automatic grouping list update.

In S304, the CPU 101 automatically sets the grouping list. At this time, the CPU 101 sets (updates) the grouping list by performing grouping processing on the ID list (eg, the ID list 351). In the grouping process, a character string of the designated number of characters set in S302, starting from the first character in the character string indicating each user ID included in the ID list, is extracted. Further, a plurality of user IDs having a common extracted character string are grouped into one group, and the character string corresponding to the group is included in the grouping list. In addition, if the character string extracted from one user ID is not common to any character string extracted from other user IDs, the character string extracted from the one user ID is Include in the grouping list as a string corresponding to the containing group. After that, the CPU 101 terminates the processing according to the procedure in FIG.

On the other hand, in S305, the CPU 101 manually sets (updates) the grouping list. In this process, a list including any character string having a specified number of characters and set by the user is set as a grouping list. After that, the CPU 101 terminates the processing according to the procedure in FIG.

The CPU 101 stores the ID list and the grouping rule (grouping list) set as described above in the storage device 105 in the form of a file, registry, or the like. In the example shown in FIG. 3, the ID list 351 includes nine user IDs composed of seven alphanumeric characters. This indicates that 9 users have been registered in the authentication system. The grouping rule 352 includes the setting contents according to the procedure described above. Specifically, the grouping rule is used in user authentication, the specified number of characters is set to 2, and the setting indicating that the grouping list is automatically updated. include. The grouping rule 352 further includes a grouping list obtained by grouping the ID list 351 according to the above setting. The grouping list includes four character strings 'a0', 'a1', 'a2' and 'b0' each corresponding to a different group.

When such a grouping rule is applied, when a character string that does not match any of the character strings included in the grouping list is detected when entering the user ID, it is determined that the user ID has been entered incorrectly, and the user is notified. is notified and user authentication is not performed. In the example of FIG. 3, when it is detected that a character string that does not match any of the character strings "a0", "a1", "a2", and "b0" included in the grouping list is entered in the user ID input field, an error occurs. It is determined that an input has occurred. If a character string that matches any character string included in the grouping list is input, user authentication is performed based on the input information.

<User ID registration process>
FIG. 4 is a flow chart showing the procedure of user ID registration processing. The processing of each step in FIG. 4 is realized in the information processing apparatus 100 as processing by the CPU 101 (registration processing unit 151) when the CPU 101 reads the control program from the storage device 105 and executes it.

In S401, the CPU 101 (registration processing unit 151) accepts an operation to newly register (add) user information via an operation screen (GUI) for adding user information for user authentication. Determine the user ID to be added. Next, in S402, the CPU 101 determines whether or not the user ID to be added is registered in the ID list. proceed. In S403, the CPU 101 adds the user ID to be added to the ID list. An ID list 451 in the example of FIG. 4 shows a state in which the processing of S403 is performed on the ID list 351, and the user ID "p000001" is added to the ID list 351. FIG.

After adding the user ID, in S404, the CPU 101 checks the grouping rule set in the authentication system and determines whether or not to use the grouping rule. If the CPU 101 determines not to use the grouping rule, the process ends, and if it determines to use the grouping rule, the process proceeds to S405.

In S405, the CPU 101 confirms the grouping rule set in the authentication system, and determines whether automatic update of the grouping rule is permitted (whether the grouping rule can be updated). If the CPU 101 determines that the automatic update of the grouping rule is not permitted, it ends the processing, and if it determines that it is permitted, the processing advances to S406.

In S406, the CPU 101 checks the grouping rule set in the authentication system, and determines whether or not the group to which the user ID added to the ID list belongs has already been registered in the grouping list included in the grouping rule. . Here, the CPU 101 extracts a character string of the specified number of characters set in the grouping rule from the user ID added to the ID list, and confirms whether the character string is registered in the grouping list. If the group to which the user ID added to the ID list belongs has already been registered in the grouping list, the CPU 101 terminates the process, and otherwise advances the process to S407.

In S407, the CPU 101 adds to the grouping list the group to which the user ID added to the ID list belongs (that is, adds to the grouping list the character string of the designated number of characters extracted from the user ID in S406), thereby creating a grouping list. Update. In this manner, when user information for user authentication is registered, the CPU 101 updates the grouping list according to the registration.

The grouping rule 452 in the example of FIG. 4 shows a state in which the grouping rule 352 has undergone the processing of S407. Specifically, the grouping rule 452 extracts a character string (“p0”) of a specified number of characters (that is, two characters) from the user ID “p000001” added to the ID list 451, and converts the character string to the grouping rule 352. It is newly registered in the grouping list of. When the processing of S407 is completed, the CPU 101 terminates the processing according to the procedure of FIG.

<User ID Deletion Processing>
FIG. 5 is a flow chart showing the procedure of user ID deletion processing. The processing of each step in FIG. 5 is realized in the information processing apparatus 100 as processing by the CPU 101 (registration processing unit 151) when the CPU 101 reads out the control program from the storage device 105 and executes it.

In S501, the CPU 101 (registration processing unit 151) receives an operation to delete user information via an operation screen (GUI) for deleting user information for user authentication. to confirm. Next, in S502, the CPU 101 determines whether or not the user ID to be deleted is registered in the ID list. do. In S503, the CPU 101 deletes the user ID to be deleted from the ID list. An ID list 551 in the example of FIG. 5 shows a state in which the process of S503 has been performed on the ID list 351, and the user ID "a204567" has been deleted from the ID list 351. FIG.

After deleting the user ID, in S504, the CPU 101 checks the grouping rule set in the authentication system and determines whether or not to use the grouping rule. If the CPU 101 determines not to use the grouping rule, the process ends, and if it determines to use the grouping rule, the process advances to S505.

In S505, the CPU 101 checks the grouping rule set in the authentication system, and determines whether or not automatic update of the grouping rule is permitted (whether the grouping rule can be updated). If the CPU 101 determines that the automatic update of the grouping rule is not permitted, it ends the processing, and if it determines that it is permitted, the processing advances to S506.

In S506, the CPU 101 checks the ID list, and determines whether or not another user ID belonging to the same group as the user ID deleted from the ID list remains in the ID list. If the CPU 101 determines that no other user ID remains, it ends the process, and if it determines that it does, the process advances to step S507.

In S507, the CPU 101 updates the grouping list by deleting the group to which the user ID deleted from the ID list belongs (that is, deleting the character string corresponding to the group) from the grouping list included in the grouping rule. Thus, when the user information for user authentication is deleted, the CPU 101 updates the grouping list according to the deletion.

A grouping rule 552 in the example of FIG. 5 shows a state in which the grouping rule 352 has undergone the processing of S507. Specifically, the grouping rule 552 is obtained by deleting the character string (“a2”) corresponding to the group to which the user ID “a204567” deleted from the ID list 351 belongs. When the processing of S507 is completed, the CPU 101 terminates the processing according to the procedure of FIG.

<Input determination processing>
In the information processing apparatus 100, when a grouping rule is applied as a rule for restricting input in the user ID input field 202 and the password input field 203 on the authentication screen 201, the character string input in the user ID input field 202 is targeted. , the input determination process is performed. The CPU 101 performs input determination processing while displaying the authentication screen 201 on the display device 106 and receiving input of the user ID and password by the user. For example, the input determination process may be executed each time the input content in the user ID input field 202 changes (for example, each time a new character is input).

In the input determination process, the CPU 101 detects an input of a character string that does not match any character string included in the grouping list as an input to the user ID input field 202 of the operation screen (authentication screen 201). When the CPU 101 detects an input of a character string that does not match any character string included in the grouping list, the CPU 101 notifies the user that an incorrect user ID has been input. Detecting input of a character string that is not included in the grouping list corresponds to detecting erroneous input. In this way, by notifying the user in response to detection of the input of a character string that is not included in the grouping list (that is, the input of a user ID that does not belong to any group), It is possible to detect erroneous input in a short time and notify the user.

FIG. 6 is a flowchart showing the procedure of input determination processing. The processing of each step in FIG. 6 is implemented in the information processing apparatus 100 as processing by the CPU 101 (authentication processing unit 152) by the CPU 101 reading the control program from the storage device 105 and executing it.

In S<b>601 , the CPU 101 determines whether or not one or more characters have been entered in the user ID input field 202 of the authentication screen 201 displayed on the display device 106 . CPU 101 terminates the process when characters are not entered in user ID input field 202 . On the other hand, if one or more characters have been entered in the user ID entry field 202, the process advances to S602. In S602, the CPU 101 checks the grouping rule set in the authentication system and determines whether or not to use the grouping rule. If the CPU 101 determines not to use the grouping rule, the process ends, and if it determines to use the grouping rule, the process advances to step S603.

In step S<b>603 , the CPU 101 determines whether the input character string entered in the user ID input field 202 is a character string of a specified number of characters (target character string) starting from the first character, which is included in the grouping list. Determine if the column matches. As mentioned above, the grouping list contains one or more strings, each corresponding to a different group. Therefore, the determination in S603 corresponds to determining whether or not the user ID being entered in the user ID input field 202 belongs to any group included in the grouping list. In this way, the CPU 101 determines that the portion (target character string) corresponding to the character string of the specified number of characters included in the grouping list in the character string input in the user ID input field 202 is one of the characters included in the grouping list. Determine if the column matches.

If the target character string matches any character string included in the grouping list, the CPU 101 determines that the user ID being input conforms to the grouping rule, and ends the input determination process according to the procedure in FIG. do. For example, if the target character string matches any of the character strings "a0", "a1", "a2" and "b0" included in the grouping list of the grouping rule 352 in the example of FIG. is judged to comply with the grouping rule.

On the other hand, if the target character string does not match any character string included in the grouping list, the CPU 101 determines that the user ID being input does not conform to the grouping rule, and proceeds from S603 to S604. proceed. For example, if the target character string is "01", it does not match any character string included in the grouping list, so it is determined that the user ID being input does not conform to the grouping rule. In this way, when the CPU 101 detects that a character string that does not match any character string included in the grouping list is input to the user ID input field 202 of the authentication screen 201, the process advances to step S604.

In S603, if the number of characters already entered in the user ID input field 202 is less than the specified number of characters, it is checked whether the entered character string partially matches any character string included in the grouping list. You can judge. For example, if the specified number of characters is 2 and only one character is entered in the user ID input field 202, the entered character is replaced with the character at the corresponding position in each character string included in the grouping list (in this case, the first character). character). In the example of FIG. 3, if a character other than "a" or "b" is entered, it is determined that the user ID being entered does not conform to the grouping rule.

In order to realize the above-described processing, for example, each time a new character is entered in the user ID input field 202, the CPU 101 places the entered character in the corresponding position in the character string included in the grouping list. It may be determined whether or not the characters match. In this case, when the CPU 101 determines that the input character does not match any character string included in the grouping list, the CPU 101 performs the processing of S604 and S605.

S604 and S605 are processes when it is determined that the user ID (character string) being input does not conform to the grouping rule. In this case, the character string entered in the user ID entry field 202 does not indicate the user ID registered in the authentication system. This indicates that an erroneous entry in the user ID entry field 202 has occurred. Such an erroneous entry can occur, for example, when the user incorrectly enters a password that should be entered in the password entry field 203 into the user ID entry field 202 .

Therefore, in S<b>604 , the CPU 101 clears the user ID input field 202 by deleting the character string displayed in the user ID input field 202 on the authentication screen 201 displayed on the display device 106 . As a result, even if the user erroneously enters the password that should be entered in the password entry field 203 into the user ID entry field 202, the possibility that the entered password will be seen by others can be reduced.

After that, in S605, the CPU 101 displays a warning screen on the display device 106 (for example, displays it on the authentication screen 201). The warning screen displays a message indicating that an erroneous input has occurred in the user ID input field. As a result, the user is notified that the user ID has been entered incorrectly in the user ID entry field 202, and the user is requested to re-enter the user ID. The CPU 101 displays a warning window 650 shown in FIG. 7 on the display device 106, for example. The CPU 101 ends the display of the warning window 650 in response to pressing of the OK button or the cancel button in the warning window 650, and ends the processing according to the procedure in FIG.

Note that in S605, the CPU 101 may display the warning window 660 shown in FIG. 7 instead of the warning window 650. FIG. In the warning window 660 , the input content (character string) in the user ID input field 202 is converted into the symbol “●” and displayed in the display field 661 . When the button 662 is pressed by the user, the CPU 101 returns the character string converted to the symbol “●” to the character string before conversion and displays it in the display field 661 as shown in FIG. 7 . In this way, after displaying a message indicating that an erroneous input has occurred in user ID input field 202, CPU 101 accepts an instruction from the user to confirm the contents of the erroneous input. The character string erased from is displayed on the display device 106 . As a result, the user can confirm the contents of the incorrect input in the user ID input field 202 .

As described above, in the information processing apparatus 100 of the present embodiment, the RAM 102 stores a list (grouping list) of character strings with a specified number of characters extracted from a plurality of user IDs registered for user authentication. . The grouping list is used for grouping and managing user IDs having a common character string portion of a specified number of characters starting from a specified character position in a character string indicating a user ID, among a plurality of user IDs. CPU 101 displays on display device 106 an operation screen (eg, authentication screen 201) having a user ID entry field for entering a user ID and a password entry field for entering a password. accepts the input of The CPU 101 detects an input of a character string that does not match any character string included in the grouping list as an input to the user ID input field on the operation screen. When the CPU 101 detects an input of a character string that does not match any of the character strings included in the grouping list, the CPU 101 notifies the user that an incorrect user ID has been input.

As described above, in the present embodiment, the user is notified of detection of an incorrect input in response to detection of input of a character string not included in the grouping list in the user ID input field. According to such processing, input errors can be detected by comparing the character string entered in the user ID input field with the character strings included in the grouping list. In other words, there is no need to compare with all user IDs (included in the ID list) registered for user authentication. Therefore, it is possible to detect an erroneous entry in the user ID entry field in a short period of time and notify the user of it.

In this embodiment, the specified character position is the position of the first character in the character string indicating the user ID, but the specified character position can be set to any position. For example, if the position of the second character in the character string indicating the user ID is set as the designated character position, and 3 is set as the number of designated characters, the characters from the second to fourth characters in the character string indicating the user ID A character string that consists of is a target character string in the input determination process.

[Other embodiments]
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by processing to It can also be implemented by a circuit (for example, ASIC) that implements one or more functions.

The invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the invention.

100: information processing device, 101: CPU, 102: RAM, 103: input device, 104: communication I/F, 105: storage device, 106: display device, 151: registration processing unit, 152: authentication processing unit, 153: Display control part

Claims (11)

An information processing device,
A list of character strings with a specified number of characters extracted from a plurality of user IDs registered for user authentication, wherein the specified number of characters starting from a specified character position in the character string indicating the user ID among the plurality of user IDs storage means storing the list used for grouping and managing user IDs having a common character string part;
An operation screen having a user ID input field for inputting a user ID and a password input field for inputting a password is displayed on the display unit of the information processing device, and user input is received via the operation screen. a receiving means;
detection means for detecting an input of a character string that does not match any character string included in the list as an input to the user ID input field of the operation screen;
notification means for notifying a user that an erroneous input of a user ID has occurred when the detection means detects an input of a character string that does not match any character string included in the list;
An information processing device comprising: 2. The receiving means erases the character string displayed in the user ID input field when an input of a character string that does not match any character string included in the list is detected. The information processing device according to . After displaying on the display unit a message indicating that an erroneous input has occurred in the user ID input field, the notifying means receives an instruction from the user to confirm the contents of the erroneous input. 3. The information processing apparatus according to claim 2, wherein the character string deleted from the input field is displayed on the display unit. The detection means determines whether or not a portion of the character string input in the user ID input field, which corresponds to the character string of the specified number of characters included in the list, matches the character string included in the list. The information processing apparatus according to any one of claims 1 to 3, characterized in that: 5. The information processing apparatus according to claim 4, wherein the detection means makes the determination each time the input content in the user ID input field changes. The information processing apparatus according to any one of claims 1 to 5, wherein the designated character position is the position of the first character in a character string indicating the user ID. 3. The detection means determines whether or not the character string of the specified number of characters starting from the first character entered in the user ID input field matches a character string included in the list. 7. The information processing device according to 6. Each time a new character is entered in the user ID input field, the detection means determines whether or not the entered character matches a character at a corresponding position in the character string included in the list. ,
The notification means notifies the user that an erroneous input has occurred in the user ID input field when it is determined that the input character does not match any character string included in the list. 8. The information processing apparatus according to claim 6 or 7, characterized by: 9. The apparatus according to any one of claims 1 to 8, further comprising updating means for updating said list according to said registration or deletion when said user ID for user authentication is registered or deleted. information processing equipment. A list of character strings with a specified number of characters extracted from a plurality of user IDs registered for user authentication, wherein the specified number of characters starting from a specified character position in the character string indicating the user ID among the plurality of user IDs A control method for an information processing device comprising storage means storing a list used for grouping and managing user IDs having a common character string part,
An operation screen having a user ID input field for inputting a user ID and a password input field for inputting a password is displayed on the display unit of the information processing device, and user input is received via the operation screen. a reception process;
a detection step of detecting an input of a character string that does not match any character string included in the list as an input to the user ID input field of the operation screen;
a notification step of notifying a user that an erroneous input of a user ID has occurred when an input of a character string that does not match any character string included in the list is detected in the detection step;
A control method for an information processing device, comprising: A program for causing a computer to execute the control method for an information processing apparatus according to claim 10 .

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