JP4654883B2 - Authentication device and terminal device - Google Patents

Description

  The present invention relates to an apparatus having a function of authenticating an individual.

  With regard to cash cards used in banks and the like, withdrawal of deposits by non-persons such as skimming has become a social problem. On the other hand, the use of cash cards as IC cards is progressing, but personal authentication methods have been reviewed from the viewpoint of security, and biometrics authentication using human biometric information has been introduced to each bank as a personal authentication technique other than passwords. I'm starting. In particular, authentication technology using finger veins can perform authentication only by shining light on the finger, so it has low psychological resistance unlike fingerprint authentication, etc., and it also has excellent anti-counterfeiting properties because it uses internal information of the living body. It has the feature.

  As an authentication technique using a finger vein, for example, as disclosed in Japanese Patent Application Laid-Open No. 2005-71118, an erroneous insertion of a finger by a user unfamiliar with the apparatus or a forged finger by a malicious user is used. A technique for preventing a reduction in misrecognition of a finger vein device at low cost from insertion or the like is known.

JP 2005-71118 A

  In the authentication technique described in the above-mentioned Patent Document 1, the insertion of a finger by a user who is not familiar with the device, the difference between the current insertion method and the previous insertion method, the user is asked to place the finger on the screen. It is possible to increase the correlation with the registered pattern by guiding the user and to efficiently increase the proficiency level.

However, the user's psychological burden when he / she is determined not to be the person himself / herself is large, and the user is guided by the screen on how to place his / her finger. It is assumed that when the procession is made, the user is irritated and spends a lot of time by repositioning the finger, which is one of the reasons why the user is dissatisfied with the authentication method. Therefore, it is necessary to further reduce the probability that the person is determined to be not the person (the probability that the person himself is rejected). In order to reduce the identity rejection rate, it is sufficient to lower the accuracy of authentication, but this increases the acceptance rate of others and is extremely dangerous from the viewpoint of security.
Therefore, for security reasons, it is a future problem to reduce the identity rejection rate and further improve the authentication accuracy.

  An object of the present invention is to provide an apparatus provided with an authentication technique that reduces the identity rejection rate, which is the probability that the identity is rejected, and improves the authentication accuracy.

In order to solve the above-described problems, an apparatus according to the present invention includes an information reading unit that reads information for identifying a user, and a structure that can rotate around the axis about the direction in which the user's finger is inserted. a, a light source for emitting infrared light, the infrared and rotary unit having an imaging unit which light received by the imaging the vein of a finger of the user, the imaging data of a finger vein from said image pickup means from the light source A vein pattern extraction unit that extracts a vein pattern by receiving the information, a registration pattern storage unit in which information for specifying the user and a registration pattern for finger vein authentication are stored in association with each other, and the information reading A registration pattern corresponding to the information for identifying the user read by the section is read from the registration pattern storage section and verified by verifying with the vein pattern extracted by the vein pattern extraction section. If the parts, authentication by the authentication unit is not pass, receiving the notification, the control unit for calculating a rotation angle of the rotating portion, provided in the rotating part, the control signal from the control unit And a rotation control means for controlling the rotation of the rotating portion by the rotation angle . With this configuration, an optimal vein pattern can be obtained even if the user's finger rotates slightly (shifts) around the axis about the direction in which the finger is inserted.

  ADVANTAGE OF THE INVENTION According to this invention, the apparatus provided with the authentication technique which reduces the identity refusal rate which is the probability that the identity is refused authentication, and improves an authentication precision can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a state when a finger 12 is attached to the authentication device 1. FIG. 2 is a cross-sectional view showing the authentication device 1 in cross section. The user inserts the finger 12 into the rotating unit (rotor) 10 of the device 1 at the time of authentication. At this time, the user places the finger 12 on the guide 21 for keeping the finger 12 stable, and attaches the tip of the finger 12 to the guide such as the stopper 11. The authentication device 1 reads an ID from a card in which an ID for identifying a user is registered (for example, a cash card used in a bank or the like), a registration pattern corresponding to the ID registered in advance, a camera, or the like Infrared light from the light source 20 that has passed through the finger 12 and the guide 21 is received by the imaging unit 22 and authentication is performed by comparing the vein pattern of the finger 12 extracted based on the imaged data. At this time, if the result of the authentication is unacceptable (when it is determined that the person is not the person), the apparatus 1 performs a predetermined calculation described later to rotate the rotor 10 and perform authentication again. As a result, the optimal vein pattern can be acquired even if the user's finger rotates slightly around the axis about the direction in which the finger is inserted. Accuracy can be improved.

  FIG. 3 is a block diagram showing the configuration of the authentication device 1. FIG. 4 is a top view of the structure of a part of the authentication device 1 (the rotor 10 and the drive unit 36) as viewed from above. FIG. 5 is a cross-sectional view showing a part of the structure (the rotor 10 and the drive unit 36) of the authentication device 1 in cross section. The function of each block shown in FIG. 3 will be described with reference to FIGS.

  The authentication device 1 includes an ID reading unit 30, a rotor 10 provided with a light source 20 and an imaging unit 22, an image recognition unit 31, an authentication unit 32, a registered pattern storage unit 33, a control unit 34, and a correction value. A storage unit 35, a drive unit 36, and an output unit 37 are provided.

  As shown in FIGS. 4 and 5, the rotor 10 is provided with a plurality of drive units 36 for driving the rotor 10 and a plurality of rollers 41 for smoothly rotating the rotor 10. The drive units 36 operate in cooperation with each other, and the power is transmitted to the rotor 10 via the power transmission unit 40. The rotor 10 can rotate around the axis with the direction in which the finger 12 is inserted as an axis under the control of the drive unit 36. The rotor 10 is made of a material that does not transmit light in order to prevent strong external light such as sunlight from entering the imaging unit 22 as a disturbance and making it impossible to extract the finger vein pattern.

  As shown in FIG. 5, the light source 20 provided in the rotor 10 irradiates infrared light 50 from the back side of the finger 12 inserted into the rotor 10. The guide 21 is made of a material that can transmit the infrared light 50 from the light source 20 and is used to keep the finger 12 stable. The imaging unit (for example, camera) 22 provided in the rotor 10 receives the infrared light 50 from the light source 20 that has passed through the finger 12 and the guide 21 and images the vein of the finger 12. The image recognition unit 31 samples the imaging data from the imaging unit 22 and extracts a vein pattern. The ID reading unit 30 reads an ID, which is information for identifying a user, from the card. In the registration pattern storage unit 33, registration pattern data for finger vein authentication is stored in advance in association with the ID. The authentication unit 32 reads a registration pattern corresponding to the ID read by the ID reading unit 30 from the registration pattern storage unit 33 and performs authentication by comparing with the vein pattern extracted by the image recognition unit 31. When the result of authentication by the authentication unit 32 is unacceptable, the control unit 34 calculates the rotation angle of the rotor 10 and controls the drive unit 36. The correction value storage unit 35 stores the correction value obtained when the control unit 34 calculates the rotation angle of the rotor 10. The output unit 37 outputs the result authenticated by the authentication unit 32.

FIG. 6 is a diagram illustrating an example of data stored in the registered pattern storage unit 33. As shown in FIG. 6, the registration pattern storage unit 33 stores an ID 60 and a registration pattern 61 for finger vein authentication in association with each other. Here, the number of bits (n) of the ID depends on the specifications of the mounted device. In addition, the number of bits (T) of the registration pattern shall depend on the specification of the authentication method. Further, in order to indicate a data delimiter, a start bit may be provided before the ID 60 and an end bit may be provided after the registration pattern 61.

  FIG. 7 is a flowchart showing an authentication process in the authentication device 1. The ID reading unit 30 reads an ID from a card that stores an ID that is information for identifying the user, and transmits the ID to the authentication unit 32 (step S70). Next, the authentication unit 32 refers to the registration pattern storage unit 33 and reads a registration pattern corresponding to the ID (step 71). Further, the imaging unit 22 receives the infrared light 50 from the light source 20 that has passed through the finger 12 and the guide 21, images the vein of the finger 12, and transmits the data to the image recognition unit 31 (step 72). . The image recognition unit 31 samples finger vein imaging data to extract a vein pattern, and transmits it to the authentication unit 32 (step 73). The authentication unit 32 performs authentication by collating the registered pattern read from the registered pattern storage unit 33 with the vein pattern extracted by the image recognition unit 31 (step 74). If the authentication by the authentication unit 32 is successful, the process ends. At this time, for example, the fact that the authentication is successful is output to the output unit 37. If the authentication by the authentication unit 32 fails in step 74, the control unit 34 that has received the notification from the authentication unit 32 calculates a correction value (Δy °) described later (step 75), and the rotor 10 Is calculated (step 76). The calculated correction value (Δy °) is stored in the correction value storage unit 35 by the control unit 34. In the present embodiment, the rotation angle is assumed to be the initial value −b ° plus the correction value Δy ° (−b ° + Δy °). Next, the control unit 34 sends a control signal to the drive unit 36 to control the rotor 10 to rotate by the calculated rotation angle (−b ° + Δy °) (step 77). The drive unit 36 drives and controls the rotor 10 (step 78). Thereafter, the process returns to step 72 again, and the above-described processing of step 72 to step 78 is performed until the authentication is passed within the specified number of times. If the authentication does not pass within the specified number of times, the fact is output to the output unit 37.

  FIG. 8 is a flowchart showing a correction value (Δy °) calculation process by the control unit 34. First, the control unit 34 initializes the counter value (N) for the number of corrections (step 80). Next, the control unit 34 determines whether or not the counter value (N) is within the specified number of times (step 81), and if it is within the specified number of times, the counter is incremented by 1 (N + 1 → N) ( Step 82). Next, the control unit 34 calculates a correction value (Δy °) by multiplying the value (Δt) previously stored in the internal memory or the like as the minimum unit of the rotation angle by the counter value (N) (step 83). Note that if the counter value (N) exceeds the specified number in step 81, the control unit 34 determines that there is an abnormality and records the abnormality in the internal memory or the like (step 84).

As described above, according to the authentication device 1 according to the present invention, an optimal vein pattern can be obtained even if the user's finger rotates slightly around the axis about the direction in which the finger is inserted. Can be obtained, thereby reducing the rejection rate and improving the accuracy of authentication.
(Other embodiments)
In the above-described embodiment, the authentication apparatus 1 including each component illustrated in FIG. 3 has been described. However, each component illustrated in FIG. 3 may be included in a terminal device such as an ATM terminal or a computer terminal.

  In the above-described embodiment, the authentication device 1 includes the output unit 37. However, the output unit 37 may be provided in a device (external device) different from the authentication device 1.

  In the above-described embodiment, the registration pattern is registered in the registration pattern storage unit 33 provided in the authentication device 1, but it may be registered in a card.

  In the embodiment described above, the rotation angle for rotating the rotor 10 is −b ° + Δy °, but may be b ° −Δy °.

  In the above-described embodiment, one light source 20 and one imaging unit 22 are provided in the rotor 10, but a plurality of these may be provided in the rotor 10.

  In the above-described embodiment, the rotor 10 may have a structure other than the structures shown in FIGS. 4 and 5 as long as the rotor 10 can be smoothly rotated.

  In the above-described embodiment, the imaging unit 22 may be an optical sensor such as an element that recognizes light or a center that senses infrared rays, as necessary.

  In the above-described embodiment, when the user authentication is successful, the finger vein pattern used at the time of authentication is registered in the registered pattern storage unit 33 in association with the information for identifying the user, and again the same You may make it authenticate using the registration pattern when authenticating a user. This makes it possible to perform authentication at a higher speed.

It is the schematic which shows a state when a finger | toe is mounted | worn with the authentication apparatus 1. FIG. It is sectional drawing which shows the rotor 10 with which the authentication apparatus 1 is provided in a cross section. 2 is a block diagram illustrating a configuration of an authentication device 1. FIG. It is the top view which looked at some structures of authentication device 1 from the upper surface. It is sectional drawing which shows the structure of a part of authentication apparatus 1 in a cross section. 6 is a diagram illustrating an example of data stored in a registered pattern storage unit 33. FIG. 3 is a flowchart showing processing in the authentication device 1. 5 is a flowchart showing a calculation process of a correction value (Δy °) by a control unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Authentication apparatus 10 ... Rotor, 11 ... Stopper part, 20 ... Light source, 21 ... Guide, 22 ... Imaging part, 30 ... ID reading part, 31 ... Image recognition unit 32... Authentication unit 33... Registration pattern storage unit 34... Control unit 35... Correction value storage unit 36. 40..Power transmission part, 41 ... roller

Claims (9)

An information reading unit for reading information identifying a user;
It has a structure that can rotate around the axis about the direction in which the user's finger is inserted, a light source that emits infrared light, and the infrared light from the light source that receives the infrared light from the user. A rotating unit having an imaging unit for imaging a finger vein;
A vein pattern extraction unit that receives image data of finger veins from the imaging unit and extracts a vein pattern;
A registration pattern storage unit in which information for specifying the user and a registration pattern for finger vein authentication are stored in association with each other;
An authentication unit that reads out a registered pattern corresponding to the information that identifies the user read by the information reading unit from the registered pattern storage unit, compares the vein pattern extracted by the vein pattern extraction unit, and performs authentication; ,
When the authentication by the authentication unit is unacceptable, the control unit that receives the notification and calculates the rotation angle of the rotation unit;
A rotation control unit that is provided in the rotation unit and controls rotation of the rotation unit by the rotation angle based on a control signal from the control unit;
An authentication device comprising:   The authentication apparatus according to claim 1, further comprising an output unit that outputs an authentication result by the authentication unit.   The authentication apparatus according to claim 1, wherein the authentication unit performs authentication using a plurality of vein patterns.   When the authentication of the user passes, the authentication unit registers the finger vein pattern used at the time of authentication in the registration pattern storage unit in association with the information specifying the user, and again 3. The authentication apparatus according to claim 1, wherein authentication is performed using the registration pattern when authenticating the user. An information reading unit for reading information identifying a user;
It has a structure that can rotate around the axis about the direction in which the user's finger is inserted, a light source that emits infrared light, and the infrared light from the light source that receives the infrared light from the user. A rotating unit having an imaging unit for imaging a finger vein;
A vein pattern extraction unit that receives image data of finger veins from the imaging unit and extracts a vein pattern;
A registration pattern storage unit in which information for specifying the user and a registration pattern for finger vein authentication are stored in association with each other;
An authentication unit that reads out a registered pattern corresponding to the information that identifies the user read by the information reading unit from the registered pattern storage unit, compares the vein pattern extracted by the vein pattern extraction unit, and performs authentication; ,
When the authentication by the authentication unit is unacceptable, the control unit that receives the notification and calculates the rotation angle of the rotation unit;
A rotation control unit that is provided in the rotation unit and controls rotation of the rotation unit by the rotation angle based on a control signal from the control unit;
An output unit for outputting an authentication result by the authentication unit;
A terminal device comprising:   The terminal device according to claim 5, wherein the authentication unit performs authentication using a plurality of vein patterns.   When the authentication of the user passes, the authentication unit registers the finger vein pattern used at the time of authentication in the registration pattern storage unit in association with the information specifying the user, and again 6. The terminal device according to claim 5, wherein authentication is performed using the registration pattern when authenticating the user. The rotation control means includes a plurality of driving units for driving the rotating unit, a plurality of rollers for rotating the rotating unit, and power generated when the driving units operate with emphasis on each other. And a power transmission part for transmitting to the rotating part,
When the authentication by the authentication unit is unacceptable, the control unit transmits a control signal to the drive unit, and instructs the rotation unit to rotate the rotation unit,
The authentication device according to claim 1, wherein the driving unit controls rotation of the rotating unit based on the instruction. The rotation control means includes a plurality of driving units for driving the rotating unit, a plurality of rollers for rotating the rotating unit, and power generated when the driving units operate with emphasis on each other. And a power transmission part for transmitting to the rotating part,
When the authentication by the authentication unit is unacceptable, the control unit transmits a control signal to the drive unit, and instructs the rotation unit to rotate the rotation unit,
The terminal device according to claim 5, wherein the driving unit controls the rotation of the rotating unit based on the instruction.

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