JP2008204394A - Authentication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a device configuration of a carried part, when a part of an authentication device is carried by a user for preventing masquerading, utilizing residual biometric information. <P>SOLUTION: A camera 14 photographing a fingerprint and a lighting LED 15 are installed inside the camera body part 11, while a prism key 12 where a finger placing window 12b constructed of a hole is formed on a placing face for placing a fingerprint on the surface of a prism 12a reflecting a fingerprint image of the user, is removably formed in the body part 11. When the prism key 12 is mounted to the body part 11, the fingerprint of the user placed on the finger placing window 12b is imaged by the camera 14 via the prism 12a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, an imaging unit that captures personal biometric information is provided inside the main body, and a part of a user's biological body is captured by the imaging unit through an opening formed in a part of the surface of the main body. The present invention relates to an authentication device that authenticates whether or not the user is a valid person based on the personal biometric information of the user.

  In recent years, for reasons such as security enhancement, there are increasing opportunities to use a fingerprint locking device that performs unlocking of a door or the like or based on a fingerprint of a person who enters and exits the locking and unlocking. For example, Patent Document 1 discloses a fingerprint lock device that compares a fingerprint of a person who intends to unlock and a fingerprint registered in advance, and performs unlocking when they match.

  In Patent Document 2, a transmitter that captures a fingerprint of a user and transmits a fingerprint image, and a fingerprint image transmitted from the transmitter and a fingerprint image registered in advance are authenticated. An electronic key device with a receiver that controls the unlocking of the door when they match is disclosed, and among these, the transmitter can be carried by the user so that it can be used from a location away from the doorway The user's fingerprint image can be notified to the receiver, and the inconvenience of forcing the user to input the fingerprint by approaching the fingerprint lock device every time the user enters and exits can be solved.

  By the way, in Patent Document 3, an authentication device using an authentication medium other than the user's fingerprint is displayed on a display unit of a user's mobile phone or the like with a camera arranged at the entrance of a building or a lobby. A TV door phone that unlocks an electric lock when a legitimate user is authenticated from the read barcode is disclosed.

Japanese Patent Laid-Open No. 2002-070381 Japanese Patent Publication No. 05-022791 JP 2006-90006 A

  However, since the mounting position of the fingerprint lock device according to Patent Document 1 described above is restricted at the entrance door or in the vicinity thereof, a finger placement for placing a finger to read a fingerprint image of a person who requests unlocking The part is exposed to the outside. For this reason, third parties other than authorized users can freely attempt fingerprint authentication, so rubber or silicone rubber can be used as a clue to the residual fingerprint attached to the finger placement surface after the authorized user performs fingerprint authentication. There is a risk that fraudulent fraud may be performed by manufacturing a counterfeit finger using the counterfeit finger and impersonating a third party as a legitimate person.

  On the other hand, in the electronic key device according to Patent Document 2 described above, since a transmitter including an imaging unit that reads a fingerprint image is carried by the user, there is no room for a third party other than the user to perform fingerprint authentication. While impersonation using residual fingerprints can be prevented, at least an image capturing unit, a storage unit, and a power source (battery) that capture fingerprints are required in the transmitter, and the transmitter configuration is enlarged. There's a problem. For this reason, the portability of the transmitter is remarkably lowered, and the convenience for the user is also lost because maintenance such as battery replacement occurs. Furthermore, since it is necessary to install a large number of functional units in the transmitter, the price of the transmitter itself increases, and more transmitters are required for the number of users. Will be forced.

  In this way, it is effective to have a user carry a part of the authentication device and prevent impersonation using residual fingerprints, but in that case, how to reduce the size of the portable device configuration? This is an extremely important issue. Such a problem is not only a problem that occurs only in fingerprint authentication, but also occurs when using personal biometric information such as muscles that occur at the nodes of the finger joint other than the fingerprint.

  Further, in the TV door phone according to Patent Document 3 described above, it is necessary for the user to perform an operation of holding the authentication information (barcode) displayed on the display unit of the mobile phone or the like over the imaging region of the camera. However, it is difficult to accurately adjust the positions of the two in a situation where it is impossible to see. Therefore, there are many cases where the reading of the authentication information is not smoothly performed, and there is a problem that convenience for the user is impaired.

  For this reason, when authenticating using authentication media other than the user's fingerprint image, how to read the object to be imaged is supported, so that the position of the object to be imaged deviates from the appropriate imageable area. How to prevent this is a very important issue. The reason why such a problem arises is that if a device for displaying the mounting state of the object to be imaged such as a liquid crystal display panel is provided in order to confirm the position of the object to be imaged, the price becomes extremely high.

  Therefore, the present invention has been made to solve the above-described problems (problems) of the prior art, and in the case where the user carries a part of the authentication device and prevents impersonation using residual biometric information. Another object of the present invention is to provide an authentication device that can reduce the size of the device configuration on the portable side.

  Further, the present invention has been made to solve the above-described problems (problems) of the prior art, and in the case of performing identity verification using an authentication medium other than the user's fingerprint image, the object to be imaged It is an object of the present invention to provide an authentication device that supports reading of images and prevents the position of the object to be imaged from deviating from an appropriate imageable region.

  In order to solve the above-described problems and achieve the object, an authentication apparatus according to the present invention includes an imaging unit that images personal biometric information inside a main body, and through an opening formed in a part of the main body surface. An authentication device that images a part of a user's living body with the imaging unit and authenticates whether the user is a valid person based on the captured user's personal biometric information, A mount that is detachable from the main body for authentication, and that includes a prism that reflects an image of a part of the living body of the user, and on which a part of the living body is placed on the surface of the prism. A living body placing means having a guide portion formed of a hole on the placement surface, and when the living body placing means is attached to the main body portion, the living body of the user placed on the guide portion And the imaging unit are imaged through the prism And wherein the door.

  The authentication apparatus according to the present invention is characterized in that an image in which identification information for uniquely identifying the user is code-patterned is added to the prism.

  The authentication apparatus according to the present invention is characterized in that an image representing a symbol related to the user is embedded below the reflecting surface of the prism.

  The authentication apparatus according to the present invention is on the optical axis of the imaging unit and is located at substantially the same distance as the optical path length formed between the mounting surface, the reflecting surface of the prism, and the imaging unit. An imaging aperture is formed on the focal plane.

  An authentication apparatus according to the present invention is an authentication apparatus that reads authentication information by an imaging unit that captures an authentication object, and authenticates whether the read authentication information is valid or not. A first opening is formed on the focal plane and on the optical axis, and a second opening is formed so that a lower portion of the first opening can be visually recognized.

  According to the present invention, a prism that is formed so as to be detachable from the main body for authentication and that reflects an image of a part of the living body of the user is included, and a part of the living body is formed on the surface of the prism. A living body placing means in which a guide portion made of a hole is formed on the placing surface, and when the living body placing means is mounted on the main body portion, the living body of the user placed on the guide portion Since a part and the imaging unit are configured to form an image via a prism, the living body placing means to be carried by the user can be constituted by only a simple part of the placing unit and the prism. There is an effect that an authentication device capable of drastically reducing the device configuration can be obtained.

  In addition, according to the present invention, since an image in which identification information for uniquely identifying the user is code-patterned is further added to the prism, the biometric information of the user can be stored in the same imaging unit. There is an effect that an authentication apparatus capable of imaging partly and code-patterned identification information can be obtained.

  Further, according to the present invention, since the image representing the symbol relating to the user is embedded in the lower part of the reflecting surface of the prism, there is provided an authentication device that allows the user to visually identify his / her prism key 12. The effect is obtained.

  Further, according to the present invention, an image is picked up on a focal plane that is on the optical axis of the image pickup unit and located at substantially the same distance as the optical path length formed between the placement surface, the reflecting surface of the prism, and the image pickup unit. Because it is configured to form an opening for the fingerprint, it is possible to capture a fingerprint image without touching the user's fingerprint during imaging, and a fingerprint image that can withstand authentication even when the user's finger is wet with water There is an effect that an authentication device that can be obtained is obtained.

  Further, according to the present invention, the first opening is formed on the optical axis of the imaging unit and on the focal plane, and the second opening is formed so that the lower part of the first opening can be visually recognized. Since it is configured to form, the object to be imaged and the imageable area can be visually confirmed through the first opening and the second opening, and the position of the object to be imaged is prevented from deviating from the imageable area. It is possible to obtain an authentication device that can be used.

  Exemplary embodiments of an authentication device according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, in a present Example, the case where a user's authentication result is supplied with respect to the lock control apparatus which controls locking / unlocking of a door shall be illustrated.

  First, the external configuration of the authentication device 10 according to the first embodiment will be described with reference to FIGS. FIG. 1 is an external perspective view showing a state in which the main body 11 and the prism key 12 of the authentication device 10 according to the first embodiment are separated, and FIG. 2 shows the main body 11 and the authentication device 10 shown in FIG. 3 is a cross-sectional view of the prism key 12, and FIG. 3 is an external perspective view showing a state in which the prism key 12 is mounted on the main body 11 of the authentication device 10 shown in FIG. 4 is an explanatory diagram for explaining the optical path of the fingerprint image when the prism key 12 is attached to the main body 11 of the authentication device 10 shown in FIG. 1, and FIG. 5 is a diagram illustrating the authentication device 10 by the user. It is explanatory drawing for demonstrating the operation aspect of.

  As shown in FIG. 1, the authentication device 10 includes a main body 11 that authenticates whether or not the person is an authorized person using a fingerprint image of a person who intends to unlock (hereinafter referred to as “user”). The prism key 12 is carried by the user.

  A slot (hole) 13 shown in FIG. 2 is formed in the main body 11. When the prism key 12 is inserted into the slot 13, the prism key 12 is inserted into the main body 11 as shown in FIG. It will be installed.

  Thus, the reason why the prism key 12 is formed to be detachable from the main body 11 is that the prism key 12 can be carried by the user so that a third party other than the authorized user can perform fingerprint authentication. This is to prevent spoofing using residual fingerprints.

  As shown in FIG. 4, the prism key 12 includes a prism 12a for reflecting a fingerprint image of a user, and a finger placement window including a hole on a placement surface on which a fingerprint is placed on the surface of the prism 12a. (Guide part) 12b is formed, and the user's finger (preferably a thumb is preferred but any finger) is placed on the finger placement window 12b in a state where the prism key 12 is mounted on the main body part 11. Then (see FIG. 5), the fingerprint image of the user placed on the finger placement window 12b passes through the finger placement window 12b and is reflected by the bottom surface of the prism 12a. The image is formed on the camera 14 through the opening (not shown) of the section 11. In FIG. 2, for convenience of explanation, an explanatory diagram in which the body of the main body 11 is transmitted is shown. However, actually, the camera 14 is not exposed to the outside, and an opening is provided in the optical axis of the camera 14. It has been.

  As described above, when the fingerprint image of the user is formed on the camera 14, the camera 14 is ready to capture the fingerprint of the finger. The camera 14 is an imaging device for imaging a fingerprint of a finger, and is formed by a C-MOS camera, a CCD camera, or the like. Further, in the vicinity of the camera 14, an LED 15 that illuminates by irradiating light in the optical axis direction of the camera 14 is provided.

  Therefore, when a user's finger is placed with the prism key 12 mounted on the main body 11, a fingerprint image of the user is formed on the camera 14 and placed on the finger placement window 12b. While the illuminated finger is illuminated from the LED 15, the fingerprint of the finger can be captured by the camera 14.

  Further, since the fingerprint image of the user is formed on the camera 14 only after the prism key 12 is mounted on the main body 11, the imaging function and the authentication function are provided when the prism key 12 is removed from the main body 11. Can be prohibited.

  Therefore, in the first embodiment, the camera 14 for imaging the fingerprint and the LED 15 for illumination are provided inside the main body 11 and the mounting is performed on the surface of the prism 12a that reflects the fingerprint image of the user. When the prism key 12 having a finger placement window 12b formed of a hole on the surface is detachably formed on the main body 11, and the prism key 12 is attached to the main body 11, the prism key 12 is placed on the finger placement window 12b. Since the user's fingerprint placed on the camera and the camera 14 are imaged via the prism 12a, the prism key 12 carried by the user is only a simple part of the finger placement window 12b and the prism 12a. This makes it possible to dramatically reduce the size of the portable device.

  Further, a switch 21 is provided in the vicinity of the slot 13 of the main body 11, and when the prism key 12 is attached to the main body 11, the switch 21 is pressed to turn on, and the camera 14 and the LED 15 are turned on. The power is turned on and a fingerprint image is taken. Therefore, the fingerprint is automatically captured by the camera 14 simply by attaching the prism key 12 to the main body 11 by the user.

  On the other hand, when the prism key 12 is removed from the main body 11, the switch 21 is turned off, and the camera 14 and the LED 15 are automatically turned off. Therefore, even if the user does not intentionally perform the power on / off operation, the user can perform a series of processes from power on to fingerprint image capture to power off simply by attaching and detaching the prism key 12.

  In addition, the authentication device 10 is configured to cut out a fingerprint region from an image captured by the camera 14 and perform an authentication process using the fingerprint region, and transmit the authentication result to a lock control device which is a separate device. Yes.

  Next, the internal configuration of the authentication device 10 shown in FIGS. 1 to 5 will be described. FIG. 6 is a functional block diagram showing an internal configuration of the authentication device 10 shown in FIGS. As shown in FIG. 6, the authentication device 10 includes a power supply unit 20 having a switch (SW) 21, a switch (SW) 21a, and a battery 22, an image input unit 31, a transmission / reception unit 32, a storage unit 33, and a signal processing unit. And a control unit 30 having 34.

  The power supply unit 20 is a power supply that supplies the power of the battery 22 to the control unit 30, the camera 14, and the LED 15, and the supply and disconnection of the power is controlled by turning on or off the switch 21 or 21a. This switch 21 is turned on / off according to the already described operation of attaching / detaching the prism key 12, and is in the off state in the separated state shown in FIG. 1, and is turned on in the mounted state shown in FIG. The switch 21a is turned on / off depending on whether or not an authentication object is pressed against an imaging window 60 described later.

  For this reason, when the prism key 12 is mounted on the main body 11, power is supplied to the control unit 30, the camera 14, and the LED 15, and the fingerprint of the finger placed on the finger placement window 12b is imaged to perform authentication processing. Is ready to run.

  The control unit 30 is a control unit that performs overall control of the authentication apparatus 10 and performs imaging of a fingerprint image using the camera 14 and the LED 15, extraction of a fingerprint area, reading of a registered fingerprint image, authentication processing, transmission of an authentication result, and the like. Do.

  The image input unit 31 is a device driver that performs imaging control of a fingerprint image using the camera 14 and the LED 15. Specifically, when the image input unit 31 is activated upon receiving power supply, the LED 15 is turned on immediately. Then, after irradiating light from the LED, the camera 14 is instructed to take an image. Then, the captured fingerprint image is output to the signal processing unit 34.

  The transmission / reception unit 32 is a communication unit for transmitting the authentication result to the lock control device. The storage unit 33 is a storage device such as a nonvolatile memory that stores data (registered fingerprint image) and a program (authentication program) necessary for various processes by the signal processing unit 34.

  The signal processing unit 34 includes a fingerprint area cutout unit 34a and an authentication processing unit 34b. The fingerprint region cutout unit 34 a is a processing unit that performs a process of cutting out a fingerprint target region from the fingerprint image received from the image input unit 31. This is because the image captured by the camera 14 includes an area other than the fingerprint area. In addition to the cutout processing, processing such as rotation correction, parallel movement, and magnification correction (or magnification adjustment) can also be performed.

  The authentication processing unit 34b is a processing unit that performs an authentication process on the image of the fingerprint region cut out by the fingerprint region cutting unit 34a. Specifically, the input fingerprint image cut out by the fingerprint area cutout unit 34a is compared with the registered fingerprint image read out from the storage unit 33, and it is authenticated whether or not they match.

  Next, a processing procedure of the authentication device 10 according to the first embodiment will be described. FIG. 7 is a flowchart illustrating the processing procedure of the authentication apparatus 10 according to the first embodiment. As shown in the figure, in the authentication device 10, when the prism key 12 is mounted on the main body 11, the switch 21 is turned on in response to the mounting operation, and power is supplied to the control unit 30 ( In step S101, the LED 15 is controlled to be turned on (step S102).

  Then, an imaging instruction is given to the camera 14 under illumination by the LED 15, and a fingerprint image of the finger placed on the finger placement window 12b is taken (step S103). Thereafter, the fingerprint area is cut out from the fingerprint image by the fingerprint area cutout section 34a (step S104), and the registered fingerprint image is read out from the storage section 33 (step S105).

  Here, an authentication process using the input fingerprint image and the registered fingerprint image is performed by the authentication processing unit 34b (step S106), and the authentication result is transmitted to the lock control device which is another device (step S107).

  When the transmission of the authentication result is completed, the LED 15 is turned off (step S108), and when the prism key 12 is removed from the main body 11, the switch 21 is turned off in response to the removal operation, and the camera 14 and the control are controlled. The power supply to the unit 30 is stopped (step S109).

  As described above, in the first embodiment, the camera 14 that captures the fingerprint and the LED 15 for illumination are provided inside the main body 11 and are detachable from the main body 11. A prism key 12 having a finger placement window 12b formed of a hole on the placement surface on which the fingerprint is placed among the surfaces of the prism 12a that reflects the fingerprint image is detachably formed on the main body 11. Since it is configured to form an image of the user's fingerprint placed on the finger placement window 12b and the camera 14 via the prism 12a when mounted on the main body 11, the prism carried by the user The key 12 can be configured only with simple parts such as the finger placement window 12b and the prism 12a, and the device configuration on the portable side can be greatly reduced in size.

  In the above-described first embodiment, an example in which authentication processing is performed using a user's fingerprint image captured by the camera 14 is described. However, other authentication information is added to the image captured by the camera 14. By doing so, security can be further improved.

  For example, as shown in FIG. 8, after the user's registered fingerprint image and user ID are associated with each other in the storage unit 33 of the main body unit 11, a barcode 41 representing the user ID is printed on the prism 40, If the prism 40 is incorporated in the prism key 42, when the user's finger is placed on the finger placement window 12b with the prism key 42 mounted on the main body 11, the finger placement window 12b The image of the barcode 41 is formed on the camera 14 in addition to the fingerprint image of the user placed on the camera, and the fingerprint of the finger and the barcode 41 can be captured by the same camera 14.

  Thereafter, the fingerprint image of the user and the image of the barcode 40 are cut out from the image captured by the camera 14, the user ID corresponding to the barcode 40 is registered in the storage unit 33, and the user's input Except for the case where the fingerprint image matches the registered fingerprint image associated with the user ID, by setting the authentication result to NG, a more secure authentication device can be provided. In addition, since the registered fingerprint image associated with the user ID can be uniquely specified, it is not necessary to perform the authentication process on all the registered fingerprint images stored in the storage unit 33 of the main body unit 11. The authentication processing speed can also be improved. Further, a recognizable one such as a two-dimensional code or a symbol may be used instead of the barcode.

  The same effect can be obtained even when the IC chip 50 in which the user ID is stored is incorporated in the prism key 12 (see FIG. 9). In this case, a reader / writer that communicates with the IC chip 50 needs to be provided in the main body 11.

  In the first embodiment described above, the same prism key 12 is used among users carrying the prism key 12, so that the user can discriminate his / her own prism key 12 even if he / she visually recognizes the prism key 12. I can't. In order to eliminate this, for example, as shown in FIG. 10, an image representing a symbol related to the user at the lower part of the total reflection surface of the prism 12a (for example, a photograph of the user himself, a character or name that the user likes) ) Can be visually discriminated by the user.

  In the first embodiment described above, the case where the fingerprint of the finger is the imaging target has been described. However, the present invention is not limited to this, and is applied to the case where a node occurring in a human finger joint is the imaging target. You can also This is because the streak generated in such a node is recently considered to be a type of personal biometric information that differs from person to person.

  In the first embodiment, the example in which the fingerprint image of the user is formed on the camera 14 through the reflecting surface of the finger placement window 12b and the prism 12a has been described. From the viewpoint of relieving a person who cannot use fingerprint authentication because the fingerprint is worn out and does not have a pattern, and a person who has lost or damaged the prism key 12, an optical path which does not interpose the prism 12a while imaging with the same camera 14 An example in which an authentication medium other than the user's fingerprint is imaged using the above will be described.

  That is, in the second embodiment, as shown in FIG. 11, the optical path length is substantially the same as the optical path length formed on the optical axis of the camera 14 and between the finger placement window 12b, the reflecting surface of the prism 12a, and the camera 14. An imaging window 60 (imaging aperture shown in FIG. 12) is formed on the focal plane located at a distance of 2 and an object to be imaged is imaged on the camera 14 via the imaging window 60.

  Here, the bottom surface of the slot 13 in which the prism 12a is mounted is hollow, and there is an imaging window 60 opened on the lower surface of the housing. As shown in FIG. 12, an object to be imaged is applied to the imaging window 60 from below, and imaging is performed through the imaging window 60 on the lower surface of the housing. And the position of the object to be imaged can be prevented from deviating from the imageable area.

  For example, as shown in FIG. 13A, when an authentication symbol printed on a card is used as an object to be imaged, a symbol registered in the storage unit 33 of the main body 11 at the time of registration is stored in the user. If the symbol stored by the user at the time of authentication is held below the imaging window 60, the switch 21a (see FIG. 2) is pressed by the card and the switch 21a is turned on. Electric power is supplied to the LED 15, and a symbol on the card surface held by the user is captured by the camera 14. If it is authenticated whether or not the imaged symbol and the registered symbol match, the stored information of the user is used in addition to the key called the card, and a more secure authentication device can be provided. Such a card is obtained by, for example, printing a plurality of different symbols such as flags and tapes on the front surface and printing a two-dimensional code on the back surface of the corresponding position.

  Note that here, the authentication symbol printed on the card is taken as an example, but the same can be applied to the image displayed on the display unit of the mobile phone. For example, the user can use the stored information of the user in the same manner by storing a favorite image on the display unit of the mobile phone and calling the image to the display unit for use during authentication.

  Even when the imaging window 60 is used for imaging, the user's finger wrinkles (joint pattern) shown in FIG. 13-2 or the user's fingerprint shown in FIG. In this way, if the user's fingerprint is imaged from the imaging window 60, it is easier to obtain an image even when the finger is wet than when the user's fingerprint is imaged using the prism 12a. There is a merit and there is a merit that a residual fingerprint does not remain in order to acquire an image without contact.

  As described above, in the second embodiment, the distance is on the optical axis of the camera 14 and substantially the same as the optical path length formed between the finger placement window 12b, the reflecting surface of the prism 12a, and the camera 14. Since the imaging window 60 is formed on the focal point where it is located, it is possible to capture a fingerprint image without touching the user's fingerprint during imaging, and the user's finger is wet with water. Even in this case, a fingerprint image that can withstand authentication can be obtained.

  In the second embodiment, the illumination can be shared between the case where the user's fingerprint is imaged using the prism 12a and the case where the user's authentication medium is imaged through the imaging window 60. Cost can be reduced.

  In the first and second embodiments described above, the large authentication device 10 (main body portion 11) has been described as shown in FIG. 3, but the authentication device is configured as shown in FIGS. 14-1 and 14-2. It can be downsized. As shown in FIG. 14A, in a state where the guide unit 70 for inputting the authentication object image without contact is in a state of covering the main body, the prism 12a is received if the prism key 12 is received in the slot 13. When the guide unit 70 is rotated downward about the rotation axis, the object to be imaged is presented at the in-focus position of the camera 14 as shown in FIG. 14-2. A window to come to come.

  In the first and second embodiments described above, the example in which the prism key 12 in which the part other than the optical path of the fingerprint image in the prism 12 is covered with the case has been described, but the present invention is not limited to this. In addition, the prism key 12 can be configured to improve the convenience for the user.

  For example, as shown in FIG. 15A, the prism key 12 includes a band portion 80 attached to the prism key 12, a magnet 81 is embedded at one end connected to the prism key 12, and an iron plate 82 is embedded at the other end. Configure. If the prism key 12 is configured, when the user inserts the prism key 12 into the slot 13 of the main body 11, the prism key 12 is supported by supporting the main body of the prism key 12 with the band portion 80 straightened. When a person holds the prism key 12 in his / her hand, the prism key 12 body can be stably held without being held, and the prism key 12 can be inserted without bringing a finger into contact with the edge of the slot 13 of the body portion 11. It becomes possible. Further, when the user carries the prism key 12, as shown in FIG. 15-2, the band portion 80 is wound around the prism key 12, and the iron plate 82 embedded in one end of the band portion 80 is used as the magnet at the other end. By adsorbing it to 81, the bending position of the band part 80 (the state in which the band part 80 is wound around the prism key 12) can be held, and it is exposed from the finger placement window 12b without impairing the portability of the user. It is possible to protect the surface of the prism 12a.

  As described above, the authentication device according to the present invention reduces the size of the portable device when the user carries a part of the authentication device and prevents impersonation using residual biometric information. Is suitable.

  In addition, the authentication device according to the present invention supports the reading of the object to be imaged when performing identity verification using an authentication medium other than the user's fingerprint image, so that the position of the object to be imaged can be appropriately imaged. Suitable for preventing deviation from the area.

It is an external appearance perspective view which shows the state by which the main-body part 11 and the prism key 12 of the authentication apparatus 10 which concern on Example 1 were isolate | separated. It is sectional drawing of the main-body part 11 and the prism key 12 of the authentication apparatus 10 shown in FIG. It is an external appearance perspective view which shows the state in which the prism key 12 was mounted | worn with the main-body part 11 of the authentication apparatus 10 shown in FIG. It is explanatory drawing for demonstrating the optical path of a fingerprint image in case the prism key 12 is mounted | worn with the main-body part 11 of the authentication apparatus 10 shown in FIG. It is explanatory drawing for demonstrating the operation aspect of the authentication apparatus 10 by a user. It is a functional block diagram which shows the internal structure of the authentication apparatus 10 shown in FIGS. 3 is a flowchart illustrating a processing procedure of the authentication device 10 according to the first embodiment. 6 is an explanatory diagram illustrating an application example of a prism key according to Embodiment 1. FIG. 6 is an explanatory diagram illustrating an application example of a prism key according to Embodiment 1. FIG. 6 is an explanatory diagram illustrating an application example of a prism key according to Embodiment 1. FIG. It is explanatory drawing for demonstrating the characteristic of the authentication apparatus 10 which concerns on Example 2. FIG. It is explanatory drawing for demonstrating the imaging window 60 of the main-body part 11. FIG. It is a figure which shows an example of the authentication thing imaged from the imaging window. It is a figure which shows an example of the authentication thing imaged from the imaging window. It is a figure which shows an example of the authentication thing imaged from the imaging window. It is a figure which shows an example for reducing the size of the authentication apparatus. It is a figure which shows an example for reducing the size of the authentication apparatus. 6 is an explanatory diagram illustrating an application example of the prism key 12 according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an application example of the prism key 12 according to the first embodiment. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Authentication apparatus 11 Main-body part 12 Prism key 12a Prism 12b Finger placement window 13 Slot 14 Camera 15 LED
20 Power supply unit 21, 21a Switch (SW)
22 battery 30 control unit 31 image input unit 32 transmission / reception unit 33 storage unit 34 signal processing unit 34a fingerprint region extraction unit 34b authentication processing unit

Claims (5)

An imaging unit for imaging personal biometric information is provided inside the main body, and a part of the user's living body is imaged by the imaging unit through an opening formed in a part of the surface of the main body. An authentication device for authenticating whether or not the user is a valid person based on personal biometric information,
It is formed so as to be detachable from the main body for authentication, and has a prism that reflects an image of a part of the living body of the user and a part of the living body is placed on the surface of the prism. A living body mounting means in which a guide portion made of a hole is formed on the mounting surface,
When the living body placing means is attached to the main body, a part of the living body of the user placed on the guide part and the imaging part are imaged through the prism. Authentication device to perform.   The authentication apparatus according to claim 1, wherein an image in which identification information for uniquely identifying the user is code-patterned is added to the prism.   The authentication apparatus according to claim 1, wherein an image representing a symbol related to the user is embedded below the reflecting surface of the prism.   An imaging aperture is formed on the focal plane that is on the optical axis of the imaging unit and located at substantially the same distance as the optical path length formed between the mounting surface, the reflecting surface of the prism, and the imaging unit. The authentication apparatus according to claim 1, wherein the authentication apparatus is formed. An authentication device that reads authentication information by an imaging unit that images an authentication object and authenticates whether the read authentication information is valid,
The first opening is formed on the optical axis of the imaging unit and on the focal plane, and the second opening is formed so that the lower part of the first opening can be visually recognized. Authentication device.

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