JP2008097248A - Personal authentication device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use an image unidentified in collation for ensuring proper operation and/or preventing illegal use such as malicious use, when identity is determined by collating biological information for authentication with previously registered biological information. <P>SOLUTION: A collation value, is determined with respect to a determination threshold value in a collation failure when a collation failure occurs in collation between an authentication image of biological information for authentication and a registration image of previously registered biometric information, and an image in the previous collation failure is associated with the registration image and registered. By collating the authentication image in the current collation failure with the authentication image in the collation failure registered in association with the registration image, similarity is determined, and if a higher collation value is determined in both current and previous determination and high similarity is determined between the authentication image in the previous collation failure and that of current one, an operation warning is displayed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a personal authentication device and a personal authentication method.

Recently, the operation of a system for confirming the identity of a person using biometric information has been expanded.
For example, a PC logon system using finger veins or fingerprints, an entry / exit management system using finger veins, a bank ATM system, a game store coin management system, or the like.

  In Patent Document 1, biometric information that exists in plural in one person is registered in advance for each type, and at least one of a plurality of types of registered biometric information is selected, and the selected type of biometric information A biometric collation method is described in which biometric information is received, biometric information is accepted, and the biometric information that has been input is collated with registered biometric information of a selected type.

  In Patent Document 2, normal authentication information for service authorization and security-linked authentication information are provided for each service provision unit in the authentication information determination unit, and when security-linked authentication information is input by the authentication information input unit, security-linked authentication is performed. Depending on the type of information, the information recording means at the time of authentication information input improves the combination of recorded information at the authentication information input point and improves the information recording accuracy. And notification to the security service organization.

  Patent Document 3 describes that a warning unit warns a user when a forged finger is inserted.

  Patent Document 4 describes that a storage unit having a storage area for patent information that has failed in the past is provided.

JP-A-11-53540 JP 2000-298756 A JP-A-2005-91118 JP 2006-79537 A

  Biometric information is very important information because it can be used to identify an individual. However, if it is leaked, it can be used illegally and has high risk. Therefore, generally, the registered data is encrypted so that the contents of the data itself cannot be understood even if it is leaked.

  In the present invention, biometric information is registered in advance, authentication biometric information is input at the time of authentication, and the identity is determined by comparing the biometric information for authentication with biometric information registered in advance In addition, a personal authentication device and a personal authentication method are provided to ensure correct operation by utilizing failure images when collation fails due to lack of identity, and / or to prevent unauthorized use such as mischief The purpose is to do.

The present invention registers biometric information in advance, inputs biometric information for authentication at the time of authentication, and compares the biometric information for authentication with biometric information registered in advance to determine identity. In the personal authentication device that performs authentication,
A means for determining the identity by comparing the authentication image of the biometric information for authentication and the registered image of biometric information registered in advance, verification failure when verification failure is output and verification failure is output Means for determining the magnitude of the collation value with respect to the judgment threshold at the time, means for registering the authentication image at the time of the previous collation failure in association with the registered image, and the authentication image at the time of the collation failure at the current authentication Means for determining similarity by comparing with the authentication image at the time of verification failure registered in association with the registered image, both of the previous and current verification values being large or small, and the similarity determination being large The personal authentication apparatus is configured to include an operation warning display when it is determined that the similarity between the authentication image at the previous authentication failure and the authentication image at the current authentication failure is large. I will provide a.

  In the above personal authentication device, the registered image and the authentication image have a smaller collation value between the previous time and the current time, and the authentication image at the time of the verification failure at the current authentication time is compared with the authentication image at the time of the previous verification failure. And a means for displaying a mischief prevention warning when the similarity is determined to be high.

The present invention registers biometric information in advance, inputs biometric information for authentication at the time of authentication, and compares the biometric information for authentication with biometric information registered in advance to determine identity. In the personal authentication device that performs authentication,
A means for determining the identity by comparing the authentication image of the biometric information for authentication and the registered image of biometric information registered in advance, verification failure when verification failure is output and verification failure is output Means for determining the magnitude of the collation value with respect to the judgment threshold at the time, means for registering the authentication image at the time of the previous collation failure in association with the registered image, and the authentication image at the time of the collation failure at the current authentication Means for determining similarity by collating with the authentication image at the time of collation failure registered in association with the registered image, either of the collation values being large by similarity judgment of the collation value of the previous time or this time, and similarity Personal authentication characterized by comprising means for displaying an operation warning when it is determined by the determination that the authentication image at the time of the previous authentication failure and the authentication image at the time of the current authentication failure are large in similarity Providing the device.

  In the personal authentication device described above, the registration image and the authentication image have a small matching value of either the previous time or the current time, and the authentication image at the time of the current verification and the authentication image at the time of the previous verification failure And a means for displaying a mischief prevention warning when the similarity is determined by determining the similarity.

The present invention registers biometric information in advance, inputs biometric information for authentication at the time of authentication, and compares the biometric information for authentication with biometric information registered in advance to determine identity. In the personal authentication method by the personal authentication device that performs authentication,
When verification fails when the authentication image of the biometric information for authentication and the registered image of biometric information registered in advance are collated to determine the identity, the verification mismatch is output, and the verification failure is output The size of the verification value with respect to the determination threshold is determined, the authentication image at the time of the previous verification failure is registered in association with the registered image, and the authentication image at the time of the verification failure at the current authentication is registered as the registered image. The similarity is determined by collating with the authentication image at the time of the collation failure registered in association, the collation value is large by the previous or current collation value size determination, and the previous authentication failure by the similarity determination The personal authentication method is characterized in that an operation warning is displayed when it is determined that the image for authentication and the image for authentication at the time of the current authentication failure are highly similar.

  In the personal authentication method described above, the registered image and the authentication image have either a previous collation value that is small in the previous time, and the authentication image at the time of the current collation failure and the authentication image at the time of the previous collation failure Are characterized by displaying a mischief prevention warning when the similarity is determined by determining the similarity.

  According to the present invention, biometric information is registered in advance, authentication biometric information is input at the time of authentication, and the identity is determined by comparing the biometric information for authentication with biometric information registered in advance. In this case, a personal authentication device and personal authentication that can be used to ensure correct operation by utilizing failure images when collation fails due to lack of identity, and / or to prevent unauthorized use such as mischief A method can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a personal authentication apparatus for explaining a personal authentication method according to an embodiment of the present invention. The present embodiment is particularly suitable for an entrance / exit management system that identifies a person using biometric information, but is not limited thereto.

  FIG. 1 shows a personal authentication device 100. The personal authentication device 100 is connected to a CPU (control unit) 1 via a bus 12, an input unit 2, a biometric information reading unit 3, a display unit 4, a storage medium ( Storage means) 5, biometric information capturing means 6, biometric information reading means 7, collation, identity determination processing means (including collation means and identity determination means processing means) 8, registration means 9, and warning display means 10. The registration means 9 is related to the storage medium 5.

  The biometric information is information indicating the characteristics of human finger veins, fingerprints, eyes or faces, and these are acquired by the biometric information capturing means 6, that is, the imaging devices such as finger veins, fingerprints, eyes or faces. For finger veins or fingerprints, finger types such as a right index finger and a left little finger are different biological information.

  The display unit 4 indicates a device for displaying biometric information registered in advance, biometric information read for verification (verification biometric information), and the like.

  The input unit 2 is an input device such as a keyboard device for allowing the user of the personal authentication device 100 to instruct the CPU to start obtaining biometric information and starting collation processing. A data input instruction is detected by an instruction to the CPU.

  The biometric information capturing unit 6 is a unit that captures the biometric information acquired by the biometric information reading unit 3 and registers (stores) the biometric information in the storage medium 5 or the server 11. The storage means 5 is composed of a semiconductor memory ROM, RAM, hard disk device, etc., and stores the biometric information captured by the biometric information capture means 6 in addition to storing a control program.

  The biometric information reading unit 7 is a unit that reads registered biometric information from the IC card or the server 11 or the storage medium 5 according to an instruction from the CPU 1. In addition, the server 11 shown in the figure means a server installed outside, and the storage medium 5 means an internal storage means.

  The collation / identity determination processing unit 8 converts the biological information registered in the IC card or the server 11 (or the storage medium 5) read by the biological information reading unit 7 into the biological information read by the biological information reading unit 3. A means for performing collation, determining identity, and performing processing after identity is recognized or recognized as non-identity, and includes collation means, identity determination means, and processing means. The warning display means 10 is means for displaying a warning on the screen.

  FIG. 2 is a diagram showing details of the functions of the collation, identity determination processing means 8 and warning display means 10 of FIG. In FIG. 2, a pre-registered biometric information registration image (template) 81 and authentication biometric information authentication image 82 are collated 83, that is, accompanied by an operation of one-to-N authentication or one-to-one authentication. Perform collation. The identity of both is determined by this collation. In the case of this example, if collation value> determination threshold value, authentication (successful authentication) is performed as the identity with high identity. If collation value <determination threshold, authentication as another person is performed with low identity. In this case, verification fails (authentication failure).

  In the case of this collation mismatch, that is, collation failure 84, the collation value between the registered image 81 and the authentication image (1) 82 (the collation value with respect to the determination threshold when the collation failure is output, More specifically, the case where the comparison value is near the determination threshold value by comparison with the set threshold value is treated as large and the others are treated as small). In any case of the collation value, that is, when collation fails, the authentication image (1) 82 at the time of collation is registered in the storage means 5 in association with the registered image. This is the previous authentication image (1) 82. In this case, the magnitude of the collation value is registered. Similarly, this time (at the time of authentication following the previous time), the registered image 81 and the newly acquired authentication image (2) 87 are collated to determine whether or not to collate. If the identity is recognized as in the previous case, the personal authentication is performed, and if the identity is not recognized, a verification failure is output. In the case of this collation failure, collation is performed in the same manner as the previous time, the collation value is determined in magnitude, and registration is performed.

  Next, the authentication image (1) 86 and the authentication image (2) 87 at the time of collation failure are collated. The identity determination by collation in this case makes the personality the same as the above-mentioned identity determination, but in order to distinguish both, it is referred to as similarity determination 89 here.

  Therefore, at this stage, when the identity is not recognized, three determinations of the previous collation value magnitude determination, the current collation value magnitude judgment, and the current similarity degree judgment are performed. Corresponding to the result of the three determinations, a warning display command 90 for issuing one of the two warnings is issued. As described above, by associating the authentication image (1) and the authentication image (2) with the registered image, it is possible to perform one collation value magnitude determination and one similarity determination.

  In the warning display means 10, a mischief warning display 91 and a correct operation warning display 92 are made in response to the warning display command 90.

  FIG. 3 shows the degree of matching degree and similarity determination as a list. In FIG. 3, the matching value is first compared with the determination threshold value to determine the identity. If the collation value is greater than the determination threshold value, the user is authenticated, and if the collation value is less than the determination threshold value, the other person is authenticated. When the collation value is smaller than the determination threshold value, as described above, the collation degree is large and the collation degree is low, and the similarity between the authentication image (1) 86 and the authentication image (2) 87 is determined.

  For example, when the collation fails when the collation value is small enough to be slightly below the person's determination threshold, the authentication image (1) 86 and the authentication image (2) 87 are similar. If it is (high similarity, that is, larger than the threshold) (the previous matching value is slightly smaller than the judgment threshold, the current matching value is slightly smaller, the current similarity is large), Since it is assumed that the operation has been performed but the operation has failed, a correct operation warning display, for example, a warning “Please put your finger correctly” is displayed.

  On the other hand, when the collation value is very small compared to the person's determination threshold and the collation fails, the authentication image (1) 86 and the authentication image (2) 87 are similar (similarity degree). If it is large (that is, larger than the threshold value) (the previous collation value is very small, the current collation value is very small, this time the degree of similarity is large), the person who is operating for the purpose of mischief such as illegal operation is operating Therefore, a mischief warning display, for example, a warning such as “Please stop prank” is displayed.

  FIG. 4 shows the contents of the warning display. The screen 21 is provided with a mischief prevention warning display function 22 and an operation warning display function 24, and displays "Please stop mischief" and "Please put your finger correctly", respectively. Thereby, it is possible to distinguish and display a case where it is assumed that a correct user is operating and a case where it is assumed that a pranking person is operating. Only one warning can be displayed.

FIG. 5 shows the flow of this embodiment.
In FIG. 5, the authentication image (1) is acquired by the personal authentication device (S1), and the registered image and the authentication image (1) are collated (S2). The collation value is compared with the person's determination threshold value, and when the title value> the determination threshold value, personal authentication is performed (S4), and when the collation value <the determination threshold value, others are authenticated. If the latter collation value <determination threshold value, it is determined whether the difference between the collation value and the determination threshold is very small or very large, that is, whether the collation value is large or small (S5). In this case, the authentication image (1) at the time of collation failure is registered in the storage means, for example, the storage medium 5 or the server 12. In the previous case, registration is performed in association with the registered image as the authentication image (1) at the time of the previous collation failure (S6).

  Next, the current authentication image (2) is acquired (S7), and the registered image and the authentication image (2) are collated as in the previous time (S8). As in the previous time, personal authentication (S10) and other person authentication are performed. At this time, as in the previous time, the collation value is determined as large or small (S11), and the authentication image (2) at the current collation failure is registered in association with the registered image. The authentication image (1) and the authentication image (2) are associated with the registration image (2) via the registration image.

  The authentication image (1) and the authentication image (2) are collated to determine whether to collate (S13), and the degree of similarity between the two is determined by comparison with the person's threshold value (S14). A warning-specific warning table display command (S15) is issued to the warning display means 10 according to any of the collation degree and the similarity degree judgment, or any collation degree magnitude and similarity degree judgment.

By such steps,
An individual who registers biometric information in advance, inputs biometric information for authentication at the time of authentication, collates the biometric information for authentication with biometric information registered in advance, determines identity, and performs authentication In the personal authentication method by the authentication device,
When verification fails when the authentication image of the biometric information for authentication and the registered image of biometric information registered in advance are collated to determine the identity, the verification mismatch is output, and the verification failure is output The size of the verification value with respect to the determination threshold is determined, the authentication image at the time of the previous verification failure is registered in association with the registered image, and the authentication image at the time of the verification failure at the current authentication is registered as the registered image. The similarity is determined by collating with the authentication image at the time of the collation failure registered in association, the collation value is large by the previous or current collation value size determination, and the previous authentication failure by the similarity determination The personal authentication method is characterized in that an operation warning is displayed when it is determined that the authentication image of this time and the authentication image at the time of this authentication failure are large in similarity, and further, a registration image, an authentication image, Is one of the previous time, the collation value is small Also, a mischief prevention warning is displayed when it is determined that the similarity is determined by comparing the authentication image at the time of the verification failure at this time with the authentication image at the time of the previous verification failure to determine the similarity. A personal authentication method is configured.

The figure which shows the structure of the Example of this invention. The figure which shows the function of a present Example. The figure which shows the detailed function of the one part function of FIG. The figure which shows the example of a display. The flowchart figure of a present Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... Input part, 3 ... Biometric information reading means, 4 ... Display part, 5 ... Storage medium (storage means), 6 ... Biometric information taking-in means, 7 ... Biometric information reading means, 8 ... Verification, identity Determination processing means, 9 ... registration means, 10 ... warning display means, 11 ... server, 100 ... personal authentication device.

Claims (6)

An individual who registers biometric information in advance, inputs biometric information for authentication at the time of authentication, collates the biometric information for authentication with biometric information registered in advance, determines identity, and performs authentication In the authentication device,
Means for comparing the authentication image of the biometric information for authentication with a registered image of biometric information registered in advance, and determining identity, determining when collation is inconsistent and collation failure is output Means for determining the magnitude of the collation value relative to the threshold value, means for registering the authentication image at the time of the previous collation failure in association with the registered image, and associating the authentication image at the time of the collation failure at the current authentication with the registration image Means for determining similarity by comparing with the authentication image at the time of verification failure that has been registered in advance, both of the previous and current verification values are determined to be large, the verification value is large, and the similarity determination determines the previous authentication A personal authentication device comprising: means for displaying an operation warning when it is determined that the authentication image at the time of failure and the authentication image at the time of the current authentication failure are large in similarity.   The registered image and the authentication image in claim 1 are similar by comparing the authentication image at the time of the current authentication with the authentication image at the time of the previous verification and the authentication image at the time of the previous verification failure. A personal authentication apparatus, comprising: means for displaying a mischief prevention warning when it is determined that the similarity is high. An individual who registers biometric information in advance, inputs biometric information for authentication at the time of authentication, collates the biometric information for authentication with biometric information registered in advance, determines identity, and performs authentication In the authentication device,
Means for comparing the authentication image of the biometric information for authentication with a registered image of biometric information registered in advance, and determining identity, determining when collation is inconsistent and collation failure is output Means for determining the magnitude of the collation value relative to the threshold value, means for registering the authentication image at the time of the previous collation failure in association with the registered image, and associating the authentication image at the time of the collation failure at the current authentication with the registration image Means for determining similarity by comparing with the authentication image at the time of the verification failure that has been registered in advance, either the comparison value is large by the previous or current determination of the comparison value, and the previous by the similarity determination A personal authentication device comprising means for displaying an operation warning when it is determined that the authentication image at the time of authentication failure and the authentication image at the time of this authentication failure are large in similarity.   4. The registered image and the authentication image according to claim 3, wherein either the previous or the current verification value is small, and the verification image at the time of the current verification is compared with the authentication image at the time of the previous verification failure. A personal authentication device comprising means for displaying a mischief prevention warning when the similarity is determined to be high. An individual who registers biometric information in advance, inputs biometric information for authentication at the time of authentication, collates the biometric information for authentication with biometric information registered in advance, determines identity, and performs authentication In the personal authentication method by the authentication device,
The authentication threshold of biometric information for authentication is compared with a registered image of biometric information registered in advance to determine the identity, and a verification failure occurs when a verification failure is output. The size of the verification value relative to the value is determined, the authentication image at the time of the previous verification failure is registered in association with the registered image, and the authentication image at the time of verification failure at the current authentication is registered in association with the registered image. The similarity is determined by collating with the authentication image at the time of the collation failure, the collation value is large by the previous or current collation value determination, and the authentication image at the previous authentication failure by the similarity determination And a personal authentication method, wherein an operation warning is displayed when it is determined that the authentication image at the time of the authentication failure is high in similarity.   6. The registered image and the authentication image according to claim 5, wherein any one of the previous joint verification values is small, and the authentication image at the time of the verification failure at the current authentication is compared with the authentication image at the time of the previous verification failure. When the similarity is determined and it is determined that the similarity is large, a mischief prevention warning is displayed.

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