JP2007148724A - Personal authentication system, and personal authentication program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the acceptability of a person while maintaining high accuracy of personal authentication by preventing decrease in acceptability of a person resulting from a difference in posture at the time of registration and authentication in biometric authentication. <P>SOLUTION: A personal authentication system comprises a function and means for detecting a difference in posture as well as performing biometric authentication based on master data for authentication, and thereby checks if personal authentication is possible by correcting the posture. Then, when personal authentication can be performed by changing the posture, authentication in a normal posture is announced to a person to be authenticated, and authentication processing is performed by the person to be authenticated in the normal posture. Thus, the accuracy of personal authentication is raised and improvement in the acceptability of the person is realized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is, for example, a personal authentication system using biometric information that is used for identity verification performed in various procedures in a financial institution, or for identity verification performed in entrance / exit management of a building / condominium, and Concerning personal authentication program.

  Conventionally, personal authentication methods using ID cards and passwords have been widely used as methods for confirming the identity of the person. This personal authentication method is also employed as a personal authentication method when using a cash card or a credit card.

  In recent years, it has become difficult to ensure security with conventional personal authentication methods using ID cards and passwords, and impersonation crimes using cash cards, credit cards, and the like are rapidly increasing. For this reason, there is an interest in improving the reliability of identity verification. And, biometric authentication technology that can authenticate more strictly than ID cards and passwords by using biometric information such as fingerprints, irises, facial images, vein patterns, etc. has attracted attention.

  The biometric information has a feature that there is no person having the same biometric information other than the person, and that it is basically unchanged. For this reason, the personal authentication method using biometric information is an effective method for identifying the person.

  On the other hand, biometric information may change due to illness or injury. For this reason, a situation occurs in which biometric information changes and an individual cannot be authenticated.

  As an avoidance method when an individual cannot be authenticated due to such an unexpected factor, a personal authentication system using primary verification data and secondary verification data has been proposed (see Patent Document 1). This personal authentication system has a remedial measure that registers primary verification data and secondary verification data at the time of registration, and performs authentication processing using secondary verification data when an individual cannot be identified by primary verification data at the authentication stage. It is characterized by improving the acceptance rate.

By the way, in the personal authentication using biometric information, generally, the identity acceptance rate decreases when the accuracy of matching is increased. For this reason, in the personal authentication using biometric information, it is necessary to reduce the accuracy of matching if an attempt is made to improve the person acceptance rate.
There are two main factors that can be considered to reduce the accuracy of matching: a change in biological information due to illness or injury, and a difference in posture of the living body set in the reading device during registration or authentication.

  On the other hand, the personal authentication system mainly assumes the former disease, injury, etc., acquires biometric feature data of a plurality of parts, and performs collation by another part such as primary collation and secondary collation. We are trying to improve.

However, there is a problem that collation by such another part is not an effective measure against a difference in posture at the time of setting a living body.
Further, the personal authentication system has a complicated system configuration, for example, a plurality of reading means are required to use data of a plurality of different parts.

JP 2001-307102 A

  In view of the above-described problems, an object of the present invention is to provide a personal authentication system and a personal authentication program that can improve the accuracy of personal authentication and increase the acceptance rate.

  The present invention is an authentication system for performing personal authentication based on pre-registered registered biometric information and acquired biometric information acquired at the time of authentication, wherein the registered biometric information is master biometric information used for personal authentication, The master biometric information is composed of auxiliary biometric information having a different posture of the biometric, and in the personal authentication, a coincidence determination for determining a coincidence between the master biometric information and the acquired biometric information, the auxiliary biometric information, and the It is characterized in that posture determination relating to posture is executed based on the acquired biometric information.

  According to the present invention, the accuracy of personal authentication can be improved and the acceptance rate can be increased.

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

  FIG. 1 is a block diagram showing a configuration of a personal authentication system 1 using biometric feature data according to one embodiment of the present invention. This personal authentication system 1 includes a registration device 2 for registering biometric feature data, a data storage unit 3 as storage means for storing biometric feature data, and a personal authentication device that performs biometric authentication using biometric feature data. 4. The biometric feature data is data obtained by extracting feature points from the read biometric information read from the user's biometric, and is a kind of biometric information.

  FIG. 2 shows a device schematic diagram of the registration device 2 and the personal authentication device 4. Each of the registration device 2 and the personal authentication device 4 includes a display device 70 equipped with a speaker as a communication means, a biometric information reading means 71 as a biometric information reading means, and an IC card 32 as a data storage unit 3. Card processing device 72 for registering data and confirming the authentication result (data writing means during registration and data read / write means during authentication), display device 70, biometric information reading means 71, and card processing device 72, and a control device 73 that mutually controls 72. The biometric information reading unit 71 is provided with a finger setting unit 79 (biological setting unit) that allows a user to set a finger as a living body on the surface.

  FIG. 3 is a block diagram showing the configuration of the registration device 2 of the personal authentication system 1. The registration device 2 includes a biometric information reading unit 10, a biometric feature data extraction unit 11, a communication unit 13, a data write unit 12, and a control device 73.

  The registration device 2 collects biometric feature data using the biometric information reading unit 10 and the biometric feature data extraction unit 11 and registers the biometric feature data in the data storage unit 3 via the data write unit 12.

The biometric information reading unit 10 collects a finger vein pattern of a person to be registered as read biometric information.
The biometric feature data extraction unit 11 extracts and creates biometric feature data based on the read biometric information collected by the biometric information reading unit 10, and the created biometric feature data (registered biometric information) is stored in an IC card 32 as a storage medium. It stores as master data (master biometric information) or auxiliary data (auxiliary biometric information).

Here, the master data is data for identifying a person used for determining whether or not the person is the person, and is read in a normal posture (for example, a posture in which the center of the finger belly is placed facing the surface of the finger set unit 79). Data.
The auxiliary data is data in which the posture of the living body read is different from the master data.For example, the angle of how to place the finger such as a state where the finger is bent with respect to regular data or the finger is tilted sideways is changed. The data is different in attitude from the master data, such as a changed state. In the present embodiment, data obtained by changing the finger placement angle from the regular data is used as auxiliary data.

  Further, classification information for classifying the biometric feature data such as whether the biometric feature data is master data, auxiliary data, right hand or left hand is input from the communication means 13 and stored in the IC card 32 by the data writing means 12 by the control device 73. To do.

  Explaining the input of this classification information, when inputting the master data, the control device 73 should be taken at the time of collation, such as requesting the registration target person to straighten the finger and point the nail straight up. The registration target person is notified via the communication means 13 so that the registration target person inputs data in a normal posture.

  When inputting auxiliary data, the control device 73 announces an input method to the person to be registered via the communication means 13. When registering finger vein data, it is assumed that there is one master data for authentication for one finger, and a plurality of auxiliary data for posture determination can be registered.

By using a single master data for authentication in this way, it is more accurate than an authentication method in which a plurality of data is registered as in the past, and if one can authenticate with the person, the person is determined to be the person. High personal authentication. Further, by using a plurality of auxiliary data for posture determination, it is possible to accurately determine a difference in posture.
The biometric information reading unit 10 and the biometric feature data extracting unit 11 constitute a biometric information acquisition unit for registration.

The communication means 13 is a display device 70 equipped with a speaker or the like, and is intended to communicate with a registration target person.
The data write means 12 stores master data and auxiliary data, which are biometric feature data, and classification information for classifying these biometric feature data in the information holding unit 30 of the IC card 32 shown in FIG.

  FIG. 4A is a schematic diagram of an IC card 32 used as the data storage unit 3 of the personal authentication system 1, and FIG. 4B is a schematic diagram of an IC chip 31 mounted on the IC card 32. .

  In the IC chip 31 mounted on the IC card 32, an information holding unit 30 and an authentication processing unit 42 (authentication means) are provided, and biometric feature data as shown in FIG. ing. Further, the IC card 32 is provided with a communication unit (not shown), and the communication unit executes data communication with the data write unit 12 of the registration device 2 and the data read / write unit 44 of the personal authentication device 4. The communication unit is configured with a contact terminal in the case of the contact type IC card 32, and is configured with an antenna in the case of the non-contact type IC card 32.

  FIG. 5 shows a data table 50 stored in the information holding unit 30. The data table 50 includes data types for determining the types of biometric feature data (classification information such as authentication master data or auxiliary data for posture determination), biometric feature data, right hand or left hand, and types of posture changes. (Finger rotation angle) and registered finger type. Thereby, one master data which is biometric feature data and a plurality of auxiliary data can be distinguished and registered.

The authentication processing unit 42 illustrated in FIG. 4 performs identity determination (matching degree determination) and posture determination.
In the identity determination, the master data registered in the information holding unit 30 is compared with the biometric feature data collected, extracted, and created by the personal authentication device 4, and the degree of coincidence is a threshold value m (see FIG. 6). If it is above, it is determined that the user is the person.

  Here, FIG. 6 shows the relationship between the degree of coincidence m, the degree of coincidence n, and the degree of coincidence p between the registered biometric feature data and the biometric feature data collected, extracted, and created for collation. The degree of coincidence m is a boundary value (identity determination value) that can be determined to be the person, and the degree of coincidence n is a boundary value (separate person determination value) that can be determined to be not the person. Therefore, the degree of coincidence between n and m is a gray zone in which it is difficult to determine whether or not the person is the person, and is a posture determination necessary region for performing posture determination.

  In the posture determination, when the matching degree of the collation result is n or more and less than m, the authentication processing unit 42 uses auxiliary determination data stored in the information holding unit 30 and data for posture determination and the personal authentication device 4. Is performed by comparing and collating biometric feature data collected, extracted, and created. As a result of the collation, when the matching degree of the auxiliary data is equal to or higher than the threshold value p, the authentication processing unit 42 determines that the posture where the finger is placed is different from the normal posture. This determination result is transmitted to the personal authentication device 4 via the data read / write means 44 (see FIG. 7).

  Here, the matching degree p (different posture determination value) is set to be equal to or higher than the matching degree n. This is because if the posture is different from normal and the matching degree of the person identification is low, there should be auxiliary data indicating a matching degree higher than the matching degree with the master data, and auxiliary data having a matching degree of n or more is present. Since it should exist, the degree of coincidence p is set based on this.

  When it is determined that the posture is not a normal posture in the posture determination mode for performing posture determination, after requesting the person to correct his / her posture, the mode shifts again to the user authentication mode in which comparison / collation with the master data is performed.

  FIG. 7 is a block diagram showing a configuration of the personal authentication device 4 in the personal authentication system 1. The personal authentication device 4 includes a collation biometric information reading unit 40, a biometric feature data extraction unit 41, a communication unit 43, a data read / write unit 44, and a control device 73.

The collation biometric information reading means 40 collects the biometric information read by the person to be authenticated. The biometric feature data stored in the IC card 32 is stored as biometric information. A device that can collect patterns.
The biometric feature data extraction unit 41 extracts and creates biometric feature data (acquired biometric information) from the read biometric information collected from the authentication subject.
The collation biometric information reading unit 40 and the biometric feature data extraction unit 41 constitute a biometric information acquisition unit.

  The communication means 43 outputs the collation result of the biometric feature data by display or sound and outputs the normal posture by changing the posture of the living body (in this embodiment, the angle at which the finger is placed). An output that announces the person to be authenticated to input biometric information is executed. Therefore, the communication unit 43 functions as an output unit that outputs the authentication result and a notification unit that notifies the user to change the posture.

  The data read / write means 44 transmits the biometric feature data created by the biometric feature data extraction unit 41 to the IC card 32. It also functions as a registration information acquisition unit, and receives biometric feature data registered in the IC card 32.

  The control device 73 executes various control operations. Further, the control device 73 transmits the biometric feature data to the IC card 32 via the data read / write unit 44 and receives the determination result of the identity determination and the posture determination from the IC card 32. When the determination result that the posture is not normal but not the person himself / herself is received, the control device 73 uses a figure or the like of a finger shape to indicate a message for prompting the communication means 43 to correct how to place the finger and how to place the finger. Display and announce the person to be authenticated to input biometric information in the correct posture. In the comparison / collation with the auxiliary data, when the matching degree is p or less and the determination result that the matching degree is p or less is received, the control device 73 performs the transaction again by the communication means 43 or the registered data (master Data and auxiliary data) are announced to the subject of authentication.

  The control device 73 stores the number of times of transition between the user authentication mode and the posture determination mode in the authentication processing unit 42, and if the authentication target person is not authenticated even if the number of times of the transition is redoed and exceeds the allowable number of times t, Simultaneously with the determination of refusal, an announcement is made to the person to be authenticated via the communication means 43 that the registered data may have changed due to aging, changes in physical condition, injury, or the like.

  With this configuration, the personal authentication device 4 uses the biometric feature data collected using the matching biometric information reading unit 40 and the biometric feature data extracting unit 41 and the biometric feature data stored in the data storage unit 3 as a data storage unit. 3 can be compared and verified by the authentication processing unit 42 in the IC card 32, and identity authentication and posture determination can be performed.

  FIG. 8 shows a posture change request screen 61 when a finger placement change (posture change) is communicated to the person to be authenticated. The posture change request screen 61 displays a picture of a finger with a poor posture and a correct finger placement in order to notify the person to be authenticated that the finger placement is incorrect. As a result, the person to be authenticated can understand that the finger placement is bad and the person is not authenticated, and the person to be authenticated can correctly authenticate by correctly placing the finger.

  FIG. 9 is an explanatory diagram for explaining an example of a graph showing a displacement of the degree of coincidence between registered data registered in advance and read data (read biometric feature data) read at the time of collation together with an image diagram of an angle at which a finger is placed. . The horizontal axis of the graph indicates deviation from the normal posture, and the vertical axis of the graph indicates the degree of coincidence between the finger registration data and the read data collected at the rotation angle indicated on the horizontal axis.

  FIG. 9A shows a graph when the finger is set in a normal posture. When the finger is set in a normal posture, the read data matches the registered data with a rotation angle of 0 ° with a matching degree of m or more, and the registered data with a deviation has a matching degree of less than m.

  FIGS. 9B and 9C are graphs when the finger is set in a state where the posture (the rotation angle of the finger) is different from the normal state (a state where a deviation is given). In this case, the rotation angle of the finger (the horizontal axis of the graph) showing a high degree of coincidence of m or more is an angle different from the rotation angle 0 °. The degree of coincidence with the registered data with a rotation angle of 0 ° is n or more and less than m. As the rotation angle at the time of setting the finger increases, the rotation angle showing a high degree of coincidence is further away from the rotation angle of 0 °. Therefore, the posture (rotation angle) where the finger is set can be predicted based on the rotation angle of the registration data indicating a high degree of coincidence.

  FIG. 9D shows a graph when another person's finger is set. When another person's finger is set, the degree of coincidence is low for all registered data. Thus, it can be clearly determined that the person is another person.

  FIG. 10 is a flowchart showing the biometric feature data registration procedure by the registration device 2 of the present embodiment. First, the control device 73 of the registration device 2 waits until it detects that the IC card 32 for storing biometric feature data has been inserted into the card processing device 72 (step S1).

  Next, the control device 73 announces on the display device 70 that the master data for authentication is registered, and causes the biometric information reading means 71 to place the finger of the person to be registered in a normal posture. Based on the read biometric information collected by the biometric information reading means 71 from this finger (biometric), biometric feature data is extracted and created, and the biometric feature data is stored (registered) in the IC chip 31 in the IC card 32 ( Step S2).

  Subsequently, the control device 73 displays an announcement for registering the biometric feature data as auxiliary data for posture determination on the display device 70, and the same finger as that registered as the master data is read with biometric information reading means in a posture with a different rotation angle. 71. Read biometric information is collected from the finger using the biometric information reading means 71, and biometric feature data is extracted and created based on the read biometric information. The created biometric feature data is stored (registered) as auxiliary data for posture determination in the IC chip 31 in the IC card 32 (step S3).

  When the registration of the auxiliary data is input by the person to be registered on the touch panel (communication means 13) provided on the display device 70 or when the auxiliary data is collected and stored for a certain predetermined number of times z ( In step S4), the control device 73 returns the IC card 32 to the person to be registered and ends the registration process (step S5).

  Through the above operation, master data and auxiliary data can be acquired as biometric feature data and registered in the IC card 32. As a result, the person to be registered can receive personal authentication using the IC card 32.

  FIG. 11 shows a flowchart of a procedure in which the personal authentication device 4 of the personal authentication system 1 of this embodiment performs personal authentication using biometric feature data. First, the control device 73 waits until it detects that the IC card 32 that is the data storage unit 3 in which the biometric feature data is registered is inserted into the card processing device 72 (step S11).

  When detecting that the IC card 32 is inserted, the control device 73 executes biometric information acquisition processing, collects biometric information read from the biometric information reading means 71, and extracts biometric feature data from the collected read biometric information. create. And the control apparatus 73 performs registration information acquisition processing, reads the master data for authentication out of registration data from the IC card 32, and performs the biometric feature data and master data extracted from the person to be authenticated in the authentication processing in the IC card. An authentication process for comparison / collation is performed by the unit 42 (step S12), and the degree of coincidence is calculated by the authentication processing unit 42 (step S13).

  Based on the collation result, the control device 73 determines that the person is the person if the degree of coincidence is m or more (step S14), and performs an output process for informing the person to be authenticated that the person has been authenticated via the display device 70. Execute (Step S22). Then, the card is returned to complete the personal authentication transaction (step S23).

  When the degree of coincidence is less than m (step S14), the control device 73 shifts to a determination of whether or not to shift to data collation using auxiliary data (step S15). When the degree of coincidence is less than n (step S15), the control device 73 determines that the user is not the user, displays an error message indicating that the user cannot be authenticated via the display device 70, and indicates that the user cannot be used. An output process to be transmitted to the person is executed (step S21). Then, the card is returned to complete personal authentication (step S23).

  When the degree of coincidence is n or more (step S15), the control device 73 reads the auxiliary data in the IC card 32 and compares the auxiliary data with the biometric feature data collected from the person to be authenticated by the authentication processing unit 42. Collation is performed (step S16), and the degree of coincidence is determined (step S17).

  When the degree of coincidence is p or more (step S18), the control device 73 informs the person to be authenticated that the finger placement is incorrect via the display device 70, changes the finger placement, and authenticates the person again. An output process for announcing the process is executed (step S19). When notifying the person to be authenticated of the difference in how to place a finger, an image in the shape of a finger such as the posture change request screen 61 in FIG. 8 is displayed on the screen, and an announcement is made using voice or light.

  When the degree of coincidence is less than p (step S18), the control device 73 repeats collation for all registered auxiliary data for posture determination (step S20).

  When there is no auxiliary data that matches with the matching degree p or more (step S20), the control device 73 executes an output process that informs the person to be authenticated that the person cannot be authenticated via the display device 70 (step S21). ), The card is returned from the card processing device 72 and the transaction is terminated (step S23).

  Through the above operation, highly accurate personal authentication using only master data can be performed. If the person to be authenticated tries to be authenticated with a posture that is different from the normal rotation angle of the finger that is a living body, it can recognize that the posture of the living body is different by collating with auxiliary data, change the posture, and change Personal authentication can be implemented. Therefore, it is possible to prevent the user from being authenticated due to the difference in posture, and to notify the person to be authenticated that the posture at the time of authentication is different from the normal posture at the time of registration.

  As described above, the personal authentication system 1 can solve both conflicting problems of preventing a decrease in the personal acceptance rate and improving the authentication accuracy. And the user can use it easily and comfortably without the trouble of registering different biological parts many times. In addition, since it is not necessary to provide a plurality of reading devices, the entire device can be manufactured at low cost.

  In addition, since the user can determine the posture at the time of registering the auxiliary data, individual differences can be given to the angle and orientation of the posture.

As a second embodiment, a personal authentication system 1 configured to move the reading unit of the biometric information reading unit 71 of the personal authentication device 4 will be described.
FIG. 12 is a schematic diagram of the biometric information reading unit 71 that is a component of the personal authentication device 4. The biometric information reading means 71 of the second embodiment can move so that the light receiving sensor 80 as a reading unit surrounds the periphery of the finger F placed on the finger setting unit 79 as indicated by an arrow in the figure. The reading biometric information is obtained at a predetermined position within the range.

  FIG. 13 shows a schematic diagram of a moving mechanism (registering moving means) of the light receiving sensor 80. The moving mechanism includes a motor 81 connected to the light receiving sensor 80 and a drive unit 82 connected to the motor 81. The motor 81 is rotationally driven under the control of the drive unit 82, and the light receiving sensor 80 connected to the output shaft of the motor 81 by the arm 84 rotates around the finger by this rotation.

  Since the constituent elements other than the biometric information reading means 71 provided in the personal authentication system 1 are the same as those in the first embodiment, detailed description thereof is omitted. The horizontal axis of the graph shown in FIG. 9 of the first embodiment indicates the rotation angle of the light receiving sensor 80 in the second embodiment.

FIG. 14 shows a flowchart of a procedure in which the personal authentication device 4 of the personal authentication system 1 of the second embodiment performs personal authentication using biometric feature data.
First, the control device 73 waits until it detects that the IC card 32 that is the data storage unit 3 in which the biometric feature data is registered is inserted into the card processing device 72 (step S30).

  When it is detected that the IC card 32 is inserted, the control device 73 waits until it is detected that the finger is set on the finger setting unit 79 of the biological information reading means 71 (step S31).

  The control device 73 extracts and creates biometric feature data from the read biometric information collected by the biometric information reading means 71. The control device 73 reads the authentication master data from the IC card 32, compares the biometric feature data extracted / created by the person to be authenticated with the authentication master data by the authentication processing unit 42 in the IC card 32. An authentication process for matching is executed (step S32), and the degree of coincidence is calculated by the authentication processing unit 42 (step S33).

  Based on the collation result, the control device 73 determines that the person is the person if the degree of coincidence is m or more (step S34), and performs an output process for informing the person to be authenticated that the person has been authenticated via the display device 70. Execute (Step S41). Then, the card is returned to complete the personal authentication transaction (step S42).

  When the degree of coincidence is less than m (step S34), the control device 73 determines whether or not the light receiving sensor 80 is rotated by the drive unit 82. Here, when the degree of coincidence is less than n, it is determined that the person is not the person (step S40), the card is returned (step S42), and the personal authentication is terminated.

  When the degree of coincidence is n or more (step S35), the control device 73 operates the light receiving sensor 80 by the drive unit 82 (step S36). Then, the control device 73 determines the degree of coincidence between the biometric feature data collected by the light receiving sensor 80 and the auxiliary data at each movement position (step S37).

  When the degree of coincidence is p or more (step S38), the control device 73 determines that the finger placement of the authentication subject person is not correct and instructs the authentication subject person to place the finger via the display device 70. Announcement is made to change and perform the personal authentication process again (step S39). In this way, when telling the person to be authenticated of the difference in finger placement, a finger-shaped image such as the posture change request screen 61 shown in FIG. Make an announcement using.

  When the degree of coincidence is less than p (step S38), the control device 73 informs the principal through the display device 70 that the person to be authenticated is not the principal (step S40), and returns the card from the card processing device 72. The transaction is terminated (step S42).

  With the above-described configuration and operation, the same operational effects as those of the first embodiment can be obtained, and the personal authentication system 1 can perform biometric features with a plurality of postures without changing the posture of the finger set on the finger setting unit 79 by the user. Data can be acquired, and master data and auxiliary data can be acquired efficiently.

In addition, since the user does not need to reposition the finger on the finger setting unit 79, the collection of the read biometric information can be completed in a short time.
Furthermore, since the position of the light receiving sensor 80 when acquiring auxiliary data can be determined mechanically accurately, auxiliary data with a fixed posture can be acquired.

  In the first and second embodiments, the registration device 2, the data storage unit 3, and the personal authentication device 4 have been described as independent single devices. However, these devices are connected to each other via a network, and data communication is performed by data communication. Registration and authentication may be performed.

  Further, in the personal authentication system 1 of the first and second embodiments, the IC card 32 equipped with the IC chip 31 that can be carried by the person to be authenticated is used as the data storage unit 3, but an appropriate server or the like connected by a network is used. A storage device may be used as the data storage unit 3.

  In the personal authentication systems 1 of the first and second embodiments, the finger vein pattern is used as the biometric information. However, other biometric information such as a fingerprint, a face image, and a palm vein pattern may be used.

  In addition, this invention is not limited only to the structure of the above-mentioned embodiment, Many embodiments can be obtained.

The block diagram which shows the structure of a personal authentication system. The apparatus schematic of a registration apparatus and a personal authentication apparatus. The block diagram which shows the structure of a registration apparatus. Schematic of an IC card. The block diagram of the data table preserve | saved at an information holding part. Explanatory drawing which shows the relationship between the coincidence degree m of biometric feature data, the coincidence degree n, and the coincidence degree p. The block diagram which shows the structure of a personal authentication apparatus. The image figure of the attitude | position change request | requirement screen displayed on a communication means. Explanatory drawing of the displacement of a coincidence degree by the difference in attitude | position. The flowchart which shows the biometrics characteristic data registration procedure by a registration apparatus. The flowchart which shows the personal authentication procedure by a personal authentication apparatus. FIG. 6 is a schematic diagram of a biological information reading unit according to the second embodiment. FIG. 6 is a schematic diagram of a light receiving sensor moving mechanism according to a second embodiment. 10 is a flowchart of a personal authentication procedure according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Personal authentication system, 2 ... Registration apparatus, 3 ... Data storage part, 4 ... Personal authentication apparatus, 10 ... Biometric information reading means, 11 ... Biometric feature data extraction part, 13 ... Communication means, 12 ... Data write means, 40 Reference biometric information reading means, 41 biometric feature data extraction unit, 43 communication means, 44 data read / write means, 70 display device, 71 biometric information reading means, 72 card processing device, 73 control device, etc. 61 ... Posture change request screen, 32 ... IC card, 30 ... Information holding unit, 42 ... Authentication processing unit, m ... Consistency, n ... Consistency, p ... Consistency, 80 ... Light receiving sensor, 81 ... Motor, 82 ... Drive part

Claims (7)

Registration information acquisition means for acquiring registered biometric information registered in advance in the storage means;
Biometric information acquisition means for acquiring biometric information from a user as acquired biometric information;
Authentication means for performing personal authentication based on the registered biometric information and the acquired biometric information;
Output means for outputting the authentication result,
The registered biometric information is
Master biometric information used for personal authentication,
The master biometric information is composed of auxiliary biometric information with a different posture of the living body,
The authentication means is
A degree of coincidence determination for determining a degree of coincidence between the master biological information and the acquired biological information;
A personal authentication system configured to perform posture determination related to posture based on the auxiliary biometric information and the acquired biometric information. The personal authentication according to claim 1, further comprising notification means for notifying that the posture is changed when it is determined that the degree of matching is low and the identity cannot be determined by the matching level determination and the posture determination determines that the posture is different. system. The posture determination is configured to determine that the posture is different when the degree of coincidence between the auxiliary biometric information and the acquired biometric information is a different posture determination value or more,
The personal authentication system according to claim 2, wherein the different posture determination value is set higher than a different person determination value that is determined to be a different person in the matching degree determination. The personal authentication system according to claim 2, further comprising a moving unit that moves the reading unit of the biometric information acquisition unit. The registration information acquisition means, the biometric information acquisition means and the output means are provided in a personal authentication device,
The storage means comprises a storage medium;
The personal authentication system according to any one of claims 1 to 4, further comprising a registration device that performs registration of the master biometric information and auxiliary biometric information. The registration device includes a biometric information acquisition unit for acquiring biometric information, and a registration moving unit that moves the reading unit of the biometric information acquisition unit for registration.
The personal authentication system according to claim 5, wherein the master biometric information and the auxiliary biometric information are acquired by acquiring biometric information at each position where the reading unit is moved by the registration moving unit. A registration information acquisition process for acquiring the registered biometric information registered in advance in the storage means by the registration information acquisition means;
Biometric information acquisition processing for acquiring biometric information from a user as biometric information by biometric information acquisition means;
An authentication process for performing personal authentication by an authentication unit based on the registered biometric information and the acquired biometric information;
Execute the output process that outputs the authentication result with the output means,
The registered information acquisition process acquires, as the registered biometric information, master biometric information used for personal authentication and auxiliary biometric information in which the posture of the biometric is different from the master biometric information,
The authentication process is a personal authentication program that executes a degree-of-match determination for determining a degree of match between the master biometric information and the acquired biometric information, and a posture determination related to a posture based on the auxiliary biometric information and the acquired biometric information. .

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