JP2011118561A - Personal identification device and personal identification method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the operation method of a personal identification device for, when personal identification is executed on the basis of extracted biometrics information, or when it is presumed that the possibility of being a principle is high though the biometrics information is equal to or less than a threshold, making the personal identification device smoothly perform an authenticating operation. <P>SOLUTION: When the biometrics information of a principle input to a personal identification device is biometrics information which is lower than a set threshold, the input of a password for principle identification is encouraged, and the matching of preregistered information and extraction information is confirmed so that personal identification can be executed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a personal authentication device and biometric authentication method using biometric authentication information such as a finger vein pattern input device.

  Personal authentication devices that capture biometric information such as finger vein patterns, image them, and perform personal authentication have been adopted in various fields. In authentication, authentication is determined by comparing the extracted vein pattern with a registered vein pattern.

  Patent Document 1 includes a client device that transmits biometric authentication information obtained by performing biometric authentication, and a server device that verifies biometric authentication information received from the client device based on a predetermined biometric policy. A biometric authentication system is disclosed. The client device transmits environment information related to biometric detection including brightness and humidity at the time of biometric authentication execution to the server device together with the biometric authentication information. If the verification result of the environment information is invalid, the server device improves the environmental information. Describes a biometric authentication system, apparatus, and program for returning a message to the client apparatus.

  Patent Document 2 discloses a personal authentication device that first performs authentication by inputting a personal identification number and determines a threshold level for biometric authentication according to a security level required by the authenticated personal identification number. Next, biometric authentication is performed, and if the degree of similarity with the registered information is greater than the threshold, the user is authenticated. If the similarity is less than the threshold, the security code is entered again and the biometric threshold is easily accepted. A personal authentication device and a personal authentication method that are changed to become are described.

JP 2008-176407 A JP 2008-158627 A

  As personal authentication devices are adopted in various fields, it is required to simplify and speed up operability on the one hand, which requires high security. However, when performing biometric authentication for all registrants, if the degree of coincidence between the biometric authentication information and the registered information of the principal does not reach a predetermined threshold, the personal authentication is rejected and the authentication operation must be repeated. This will inconvenience the operation. Further, when the principal is repeatedly rejected, a procedure such as re-registering the registration information itself becomes necessary.

  It is an object of the present invention to provide a biometric authentication technology that can eliminate the inconvenience of repeating an authentication operation by inputting a personal identification number for biometric authentication information of a person below a threshold. .

  The present invention provides a personal authentication apparatus having at least a biometric authentication information reading unit for performing personal authentication, a display unit for displaying a message, a numeric keypad input unit for inputting a personal identification number, and a main body control unit. When biometric authentication information is rejected without reaching the set threshold, authentication operability is ensured by ensuring the security level without performing biometric authentication again by adding a personal identification number. Is to improve.

  The present invention first performs personal authentication using biometric authentication information, authenticates that the person is authentic if the biometric authentication information is equal to or greater than a set threshold, and ranges above a confirmation threshold that is likely to be the person below the set threshold. If there is biometric authentication information, it is determined that it is close to the person, and a personal identification number is input. If the personal identification number matches the registered personal identification number of the biometric information, it is determined that the person is the person. In this way, a personal authentication device is provided that authenticates the user while ensuring the security level by the first authentication operation by inputting the personal identification number.

  According to the present invention, in a personal authentication device that uses biometric authentication, when the biometric authentication information does not reach the set threshold value and requires the user to perform an authentication operation many times, a confirmation threshold value that is gentler than the set threshold value is set. By providing and collating the registered personal identification number for verification, there is no need to repeat the biometric authentication operation, and the authentication time can be shortened with smooth operability.

The block diagram which shows the structure of the personal authentication apparatus of an Example of this invention. The block diagram which shows the structure of the main-body control part of this invention Example. The flowchart which shows operation of the authentication determination procedure of this invention Example. Explanatory drawing which shows the method of the threshold value of an individual of this invention Example, and a determination procedure. Explanatory drawing which shows the relationship of the personal information database of an Example of this invention.

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

  In the system of the personal authentication device, first, the operation of reading the biometric authentication information is performed, and when the personal authentication cannot be performed, a new identification number is entered to identify the person in a single operation. Identify.

  FIG. 1 is a block diagram showing the configuration of the personal authentication device 1 in this embodiment. A biometric authentication information reading unit 2 for reading biometric authentication, a display unit 3 for displaying authentication results and operation procedures, a numeric keypad input unit 4 for inputting a personal identification number, and a card reader 5 for reading the personal identification number from a card. , A buzzer 6 for notifying the apparatus state, operation procedure and collation result by sound, an external communication unit 7 for communicating with the outside, and a main body control unit 8 for controlling each component. The display unit 3 and the buzzer 6 are used as a password request means.

  The card reader 5 and the numeric keypad input unit 4 in the personal authentication device 1 are used as personal identification number input means for identifying a person, and these can be known ones. A known sensor can be used for the biometric authentication information reading unit 2. In this embodiment, a finger vein information reading method will be described in particular.

  FIG. 2 is a block diagram illustrating a configuration of the main body control unit 8. The biometric authentication information input from the biometric authentication information reading unit 2 is discriminated by the setting threshold discriminating means 81. When the degree of coincidence of the information is greater than or equal to the setting threshold, an authentication output is issued and personal authentication is completed.

  If it is less than or equal to the set threshold, the information is input to the confirmation threshold discriminating means 82 and is compared with a confirmation threshold lower than the set threshold. If it is equal to or higher than the confirmation threshold value, it is presumed that there is a possibility that the user's biometric authentication information exists, and input of a personal identification number is required for confirmation. Next, if the same information as the person's personal identification number registered by the personal identification number discrimination means 83 is input, personal authentication is completed.

  If the confirmation threshold value is not more than the confirmation threshold value by the confirmation threshold value determination unit 82, or if the password number input by the password number determination unit 83 does not match the registered personal code number, re-input of the biometric authentication information is requested.

  FIG. 3 is a flowchart of the operation procedure of the personal authentication device. Waiting in a biometric authentication information input waiting state (S11), when a biometric is held over the biometric information reading unit 2 and biometric authentication information is input (S12), biometric authentication information reading is started (S13), and a set threshold value determining unit The biometric authentication information acquired in 81 is collated with the registered biometric authentication information (S14). If the biometric authentication information is equal to or greater than the set threshold value, the user is authenticated and the authentication is completed (S19).

  If the biometric authentication information is less than or equal to the set threshold, the confirmation threshold determination means 82 determines whether the biometric authentication information is greater than or equal to the confirmation threshold (S15). When the biometric authentication information falls within the range below the set threshold and above the confirmation threshold, the personal identification number is entered, and the personal identification number input state is displayed on the display unit 3 (S16), and the buzzer 6 is also recognized. The personal identification number is input from the numeric keypad 4 or read from the card by the card reader 5 (S17). If the personal identification number registered in advance in the personal identification number discriminating means 83 and the read personal identification number coincide with the biometric authentication information within the confirmation threshold or more (S18), the person is identified. Authentication is performed (S19). If the pre-registered personal identification number and the read personal identification number do not match, or if the personal identification number is not entered after a predetermined time, the process returns to the biometric authentication information input waiting (S11).

  FIG. 4 illustrates a case where the acquired biometric authentication information indicates a degree of coincidence that is equal to or higher than a set threshold value, and that is below the set threshold value and between the confirmation threshold values that are lower than the set threshold value, It is. FIG. 5 shows the correlation between a registered personal ID and an information database in which biometric authentication information and a password are registered using this number as an index.

  In this embodiment, the confirmation threshold is set to -20% of the set threshold. That is, if the biometric authentication information is higher than the confirmation threshold level, it can be estimated that the possibility of the identity is high in consideration of the variation in data due to the biometrics and the device.

  The biometric authentication information of the individuals B and E exceeds the set threshold and is authenticated as the person, and the biometric authentication information of the individual A is lower than the confirmation threshold and thus is authenticated as another person. Individuals C and D are less than a set threshold and are not reliable to authenticate themselves with only the biometric authentication information, but are more than the confirmation threshold, so there is a high possibility that they are individuals. When the user's personal identification number is entered, the person is identified and authenticated. For example, if 3 is entered, the person C is authenticated, and if 4 is entered, the person D is authenticated. In the case of a password other than this, it is regarded as another person and returns to waiting for biometric authentication information input.

  In the personal authentication device, the setting threshold level and the confirmation threshold level can be made variable according to the characteristics of the population to be authenticated. In other words, in cases where most members are certified by a highly homogeneous group such as a company, or when it is necessary to limit the subject of certification as in public facilities, the latter is a higher certification level. Need to increase security.

  DESCRIPTION OF SYMBOLS 1 ... Personal authentication apparatus, 2 ... Biometric information reading part, 3 ... Display part, 4 ... Ten key input part, 5 ... Card reader, 6 ... Buzzer, 8 ... Main body control part, 81 ... Setting threshold discrimination means, 82 ... Confirmation Threshold value determining means, 83 ... PIN number determining means

Claims (9)

  Controls each component of the main body, a biometric authentication information reading unit for reading the biometric authentication information of the principal, a personal identification number input unit for inputting a personal identification number for identifying the principal, a personal identification number requesting unit for requesting input of the personal identification number When the biometric authentication information read and inputted is lower than a set threshold value, the personal identification number requested by the personal identification number requesting means is inputted from the personal identification number input unit to identify the person The personal authentication device characterized by performing.   2. The personal identification device according to claim 1, wherein when the biometric information read and input is lower than a set threshold value and higher than a confirmation threshold value having a personal identification level lower than the set threshold value, the personal identification number requesting means requests the personal identification device. A personal authentication apparatus for performing personal identification by inputting a personal identification number into the personal identification number input unit.   3. The personal identification apparatus according to claim 2, wherein said personal identification number requesting means when the read and inputted biometric information is higher than a confirmation threshold of a personal identification level lower than a set threshold and approximately 20% lower than said set threshold. A personal authentication apparatus for performing personal identification by inputting the personal identification number requested by the personal identification number from the personal identification number input unit.   4. The personal authentication device according to claim 2, wherein the set threshold value and the confirmation threshold level are variable according to characteristics of a population to be authenticated. The personal authentication device according to any one of claims 1 to 4,
The main body control unit compares the input biometric information with a set threshold to identify an individual, and compares the input biometric information with a confirmation threshold having a personal identification level lower than the set threshold. And a personal identification number identifying means for identifying an individual based on an input personal identification number for biometric authentication information lower than the set threshold and higher than the confirmation threshold. Personal authentication device.   6. The personal authentication device according to claim 1, wherein the personal identification number input unit includes a numeric keypad input unit or a card reader for inputting a personal identification number.   6. The personal authentication device according to claim 1, wherein the personal identification number input request means includes a display or a buzzer for notifying a user of the personal identification number input request. A personal authentication device having a biometric authentication information reading unit, a personal identification number input unit, a display unit, and a main body control unit, and specifying an individual by biometric authentication information and a personal identification number, wherein the main body control unit is input Setting threshold discrimination means for identifying an individual by comparing biometric authentication information with a setting threshold; and confirmation threshold discrimination means for identifying an individual by comparing the input biometric information with a confirmation threshold having a personal identification level lower than the setting threshold. And, for biometric authentication information lower than the set threshold and higher than the confirmation threshold, in the authentication method of the personal authentication device having a personal identification number identifying means for identifying the person by the input personal identification number,
When the personal authentication by the set threshold value determining means is not established, when the biometric authentication information is within the range of the confirmation threshold value that is less than the set threshold value that identifies the person and that is greater than the confirmation threshold value, the password that identifies the person An authentication method for a personal authentication device characterized by the above.   9. The authentication method of the personal authentication device according to claim 8, wherein when the biometric authentication information is equal to or greater than a set threshold value, the individual is certified only with the biometric authentication information, and the biometric authentication information is within a range equal to or smaller than the set threshold value and greater than the confirmation threshold value. The personal identification number is entered, the individual is identified by confirming that the personal identification number matches the extracted biometric information, and the individual is authenticated by a single biometric reading operation. Authentication method for personal authentication device.

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