JP4011495B2 - IC card - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an IC card. In particular, the present invention relates to an IC card that displays an owner's face image only during identity authentication.
[0002]
[Prior art]
A person has a plurality of cards such as a cash card, a credit card, and a medical examination card. In recent years, technology development for integrating these multiple cards into one IC card has been underway (see Non-Patent Document 1, for example).
[0003]
[Non-Patent Document 1]
Supervised by Seiichi Ido, “IC Card Information Distribution Platform-Key Technology of the 21st Century Information Society”, Telecommunications Association, May 10, 2001 [0004]
[Problems to be solved by the invention]
When the IC card holds the owner's personal information, it is preferable to operate the IC card after authenticating the person. As one of the personal authentication methods, there is a method in which the face image of the owner is displayed on the IC card, and the human eye judges whether or not this face image matches the face of the user of the IC card. On the other hand, if a face image is always displayed on the IC card, a person who has obtained another person's IC card can determine whether or not the owner of the IC card is similar to him. In some cases, the IC card is abused. For this reason, it is preferable to display the face image of the owner on the IC card only at the time of personal authentication.
[0005]
Accordingly, an object of the present invention is to provide an IC card that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.
[0006]
[Means for Solving the Problems]
That is, according to the first aspect of the present invention, an IC card that operates with power received wirelessly from outside, a face image holding unit that holds a face image of the owner who owns the IC card, and the IC card A display unit provided on the surface of the display unit, a display control unit that displays the face of the owner on the display unit using the face image held by the face image holding unit when receiving power wirelessly, and the owner An identification information holding unit for storing the identification information, and when the identification information is read from the identification information storage unit, the display control unit receives the purpose of use of the IC card and responds to the purpose of use. An IC card for determining whether or not to display a face image on the display unit is provided.
[0007]
In the first embodiment, the face image holding unit stores a moving image of the face image, and the display control unit reads the moving image from the face image holding unit and causes the display unit to display the moving image of the owner's face. Good.
In this case, the face image holding unit may store moving images obtained by sequentially capturing the owner's face from different directions.
[0008]
The face image holding unit holds a plurality of face images having different expressions, and the display control unit sequentially reads the plurality of face images from the face image holding unit, and owners having different expressions based on the respective face images. Each of the plurality of faces may be displayed on the display unit.
[0009]
The face image holding unit stores three-dimensional data of the face image, and the display control unit may display the owner's face on the display unit while changing the orientation using the three-dimensional data.
[0011]
The power storage unit further stores a part of the power received wirelessly, and the display unit stores the power in the power storage unit for a time required for the person to visually recognize the face image after the power cannot be received wirelessly. The face image may be displayed using the generated power.
[0012]
After the wireless power cannot be received, the power storage unit may further include a power control unit that provides the power stored in the power storage unit to the display unit and cuts off the power supply to at least a part of the display control unit. .
[0013]
The display unit may include a plurality of light emitting pixels and a phosphor that is provided on each of the plurality of light emitting pixels and continuously emits light after the light emitting pixels finish emitting light.
[0014]
The face image holding unit holds a face image encrypted with the owner's private key, and an identification information holding unit that holds the owner's identification information, and an ownership that is searched based on the owner's identification information A public key receiving unit that receives the public key of the user and a decrypting unit that decrypts the face image based on the public key, and the display control unit uses the face image decrypted by the decrypting unit to You may display on a display part.
[0015]
The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are invented. It is not always essential to the solution.
[0017]
FIG. 1 is a front view of an IC card 100 according to an embodiment of the present invention. The IC card 100 includes a display unit 110 on the surface, and holds a face image of the owner in advance. The display unit 110 is, for example, a liquid crystal display panel or an EL panel.
[0018]
The IC card 100 does not have a built-in battery, and receives power from an external wireless transmission device 20 wirelessly with a predetermined frequency. Then, using the received power, the face image of the owner held in advance is displayed on the display unit 110.
For this reason, it can be visually determined that the user of the IC card 100 is the owner of the IC card 100.
Further, unless the wireless communication is received, the IC card 100 does not display the owner's face image. Therefore, the IC card 100 does not display the owner's face image except when it is necessary to authenticate the user.
[0019]
FIG. 2 is a circuit diagram of the IC card 100. The IC card 100 includes a coil 12, a processing circuit 14, a commutator 16, and a capacitor 18. The processing circuit 14 includes a display unit 110.
[0020]
One end of the coil 12 is grounded and is connected to the negative side of the processing circuit 14. The other end of the coil 12 is connected to the + side of the processing circuit 14 via a commutator 16. The capacitor 18 is provided in parallel with the processing circuit 14. The capacitor 18 is an example of a power storage unit.
[0021]
In this circuit configuration, the coil 12 generates electric power by electromagnetic waves transmitted from the wireless transmission device 20. The electric power generated in the coil 12 is rectified by the commutator 16 and the capacitor 18 and supplied to the processing circuit 14. A part of the electric power generated in the coil 12 is stored in the capacitor 18.
[0022]
The capacity of the capacitor 18 is a size necessary for continuing the display for a time required for a person to visually recognize the face image displayed on the display unit 110 after the wireless power supply is stopped. The time for which this display is continued is, for example, 1 second to 5 seconds.
Therefore, even after the person who performed face authentication returns the IC card 100 to the owner, the display unit 110 of the IC card 100 displays the face image for a while. For this reason, the holder of the IC card 100 can visually recognize the face displayed on the display unit 110 during face authentication.
[0023]
FIG. 3 is a block diagram showing a functional configuration of the processing circuit 14. In addition to the display unit 110, the processing circuit 14 includes a power control unit 120, a face image holding unit 130, an identification information holding unit 140, a public key receiving unit 150, a decrypting unit 160, and a display control unit 170. The power control unit 120 controls whether or not the power supplied from the coil 12 and / or the capacitor 18 is supplied to the display unit 110. It also controls whether to supply power to the public key receiving unit 150, the decrypting unit 160, and the display control unit 170. The face image holding unit 130 holds the face image of the owner of the IC card encrypted with the secret key of the owner of the IC card 100. The identification information holding unit 140 holds identification information of the owner of the IC card 100, for example, ID. The public key receiving unit 150 receives the public key of the owner of the IC card 100 from the outside. The decrypting unit 160 decrypts the face image of the owner using the public key received by the public key receiving unit 150. The display control unit 170 expands the decrypted owner's face image in the image memory of the display unit 110.
The details of the operation of each unit will be described later using a flowchart.
[0024]
FIG. 4 is a flowchart showing the operation of the IC card 100. When the radio transmission device 20 transmits radio and power is generated in the coil 12 (S10), the power control unit 120 includes a face image holding unit 130, an identification information holding unit 140, a public key receiving unit 150, a decoding unit 160, In addition, power is supplied to the display control unit 170. The public key receiving unit 150 reads the identification information of the owner from the identification information holding unit 140 (S20), outputs the read identification information to the outside, and requests a public key (S30). The external device that has received the identification information searches the owner's public key based on the owner's identification information, and transmits the received public key to the public key receiving unit 150 for reception (S40).
Then, the power control unit 120, the decoding unit 160, and the display control unit 170 perform image display processing (S50).
Therefore, the IC card 100 can search the owner's public key based on the owner's identification information.
[0025]
FIG. 5 is an example of S50 of FIG. This example shows the operation of the IC card 100 when the face image holding unit 130 holds a moving image of the owner's face. The moving image held by the face image holding unit 130 is obtained, for example, by capturing the face of the owner of the IC card 100 sequentially from different directions.
[0026]
The decryption unit 160 reads the moving image encrypted with the private key from the face image holding unit 130 (S100), and decrypts it using the public key received by the public key reception unit 150 (S110). If the decryption fails (S120: No), the IC card 100 determines that the face image held by the face image holding unit 130 may have been tampered with, and ends the process.
When the decoding unit 160 succeeds in decoding (S120: Yes), the power control unit 120 supplies power to the display unit 110. The display control unit 170 displays a moving image on the display unit 110 until wireless reception is received (S140) (S130).
[0027]
Therefore, the reliability of the face image displayed by the display unit 110 is increased.
Further, a person who performs face authentication by visual inspection can collate the face of the owner of the IC card 100 with the face of the owner of the IC card 100 from various directions.
[0028]
When the wireless reception is completed, the power control unit 120 cuts off the power supply to the face image holding unit 130, the identification information holding unit 140, the public key receiving unit 150, the decrypting unit 160, and the display control unit 170. (S150). For this reason, the IC card 100 can maintain the display of the display unit 110 for a long time using the power stored in the capacitor 18.
[0029]
FIG. 6 shows a first modification of the operation in S50 shown in FIG. In this modification, the face image holding unit 130 holds a plurality of still face images. The plurality of still face images have different facial expressions from each other or have different face orientations. In this example, a plurality of still face images are encrypted as one image group, that is, one data, but may be encrypted as individual data individually.
[0030]
The decryption unit 160 reads the image group from the face image holding unit 130 (S210), and decrypts it using the public key received by the public key reception unit 150 (S220). When the decryption fails (S230: No), the IC card 100 determines that there is a possibility that the image group held by the face image holding unit 130 has been tampered with, and ends the process.
[0031]
The power supply unit 120 starts power supply to the display unit 110. Then, the display control unit 170 selects one image from a plurality of still face images constituting the image group, and displays the selected image on the display unit 110 (S240). The display control unit 170 updates the displayed image (S260) after a predetermined time has elapsed (S250). The predetermined time is, for example, 1 second or more and 5 seconds or less.
For this reason, a person who performs face authentication visually can collate the face of the person holding the IC card 100 with the face of the owner of the IC card 100 with a plurality of facial expressions or a plurality of orientations.
[0032]
If the wireless transmission device 120 no longer receives radio (S270: Yes), the power control unit 120 displays the face image storage unit 130, the identification information storage unit 140, the public key reception unit 150, the decryption unit 160, and the display. The power supply to the control unit 170 is cut off (S280).
[0033]
FIG. 7 shows a second modification of the operation in S50 shown in FIG. In this modification, the face image holding unit 130 holds three-dimensional data of the owner's face.
The power control unit 120 supplies power to the decoding unit 160. The decryption unit 160 reads the three-dimensional data from the face image holding unit 130 (S210), and decrypts it using the public key received by the public key reception unit 150 (S220). When the decryption fails (S230: No), the IC card 100 determines that the three-dimensional data held by the face image holding unit 130 may have been falsified, and ends the process.
[0034]
The power supply unit 120 starts power supply to the display unit 110. Then, the display control unit 170 sets an initial value of the face angle (S340). Then, a face image viewed from the set angle is generated based on the three-dimensional data of the face (S350) and displayed on the display unit 110 (S360). Then, after a predetermined time has elapsed (S370), the display control unit 170 updates the set angle (S380), and on the condition that wireless reception continues (S390: No), a new A face image is generated (S350), and the face image displayed on the display unit 110 is updated (360). Here, the predetermined time is, for example, not less than 1 second and not more than 5 seconds.
For this reason, a person who performs face authentication visually can collate the face of the person who has the IC card 100 with the face of the owner of the IC card 100 in a plurality of directions.
[0035]
When the wireless reception is completed (S390: Yes), the power control unit 120 sends the face image holding unit 130, the identification information holding unit 140, the public key receiving unit 150, the decrypting unit 160, and the display control unit 170 to the display unit 170. The power supply is cut off (S395). Details of this operation are the same as S150 in FIG.
[0036]
In addition, the display control unit 170 may specify the orientation of the owner's face to be displayed from the outside. In this case, the display control unit 170 may display the owner's face as a still image in the designated orientation.
[0037]
FIG. 8 is a block diagram illustrating a modification of the processing circuit 14. In this example, the processing circuit 14 includes a display unit 110, a power control unit 120, a face image holding unit 130, an identification information holding unit 140, a display control unit 170, a display availability holding unit 175, and a transmission unit 180.
[0038]
The display availability holding unit 175 holds information indicating whether or not to display the face image of the owner of the IC card 100 in association with information indicating the purpose of use of the IC card 100. The display availability information holding unit 175 holds information indicating that the owner's face image is displayed in association with information indicating the purpose of use when the purpose of use is high. When the importance of the purpose of use is low, information indicating that the owner's face image is not displayed is stored in association with information indicating the purpose of use. The case where the purpose of use is high is a case where the payment amount is equal to or more than a predetermined amount when the IC card 100 has a payment function, for example.
[0039]
Then, the transmission unit 180 transmits the identification information of the owner held by the identification information holding unit 140 to the outside. Further, the display control unit 170 receives information indicating the purpose of use of the IC card 100 from the outside wirelessly. The display control unit 170 collates the received information indicating the purpose of use with the display availability holding unit 175 and determines whether to display the owner's face image. When it is determined that the owner's face image is to be displayed, the display control unit 170 causes the display unit 110 to display the face image.
For this reason, the IC card 100 does not display the owner's face image on the display unit 110 when the purpose of use of the IC card 100 is low. Therefore, the IC card 100 can further meet the general user's request that the user does not want to display his / her face on the card as much as possible.
[0040]
The operation of the processing circuit 14 when displaying the face image is the same as S100 and S130 to S150 in FIG. 5, S210 and S240 to S280 in FIG. 6, or S310 and S340 to S395 in FIG. Omitted.
[0041]
As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.
[0042]
For example, as shown in FIG. 9, the display unit 110 is provided with a backlight 112, a plurality of shutters 114 that transmit or block light from the backlight 112 for each pixel, and light that has passed through the shutter 114. A plurality of phosphors 116 that emit light may be provided. Each of the plurality of phosphors 116 includes phosphors that emit red, green, and blue, for example. In this case, the phosphor 116 continuously emits light even after the light emitting pixel has finished emitting light. Therefore, even after the person who performed face authentication returns the IC card 100, the display unit 110 of the IC card 100 displays the face for a while. For this reason, the holder of the IC card 100 can visually recognize the face displayed on the display unit 110 during face authentication.
[0043]
【The invention's effect】
As is clear from the above description, according to the present invention, the face image of the owner can be displayed on the IC card only at the time of personal authentication.
[Brief description of the drawings]
FIG. 1 is a front view of an IC card 100 according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of the IC card 100. FIG.
FIG. 3 is a block diagram showing a functional configuration of a processing circuit 14;
4 is a flowchart showing the operation of the IC card 100. FIG.
FIG. 5 is a flowchart showing an example of S50 in FIG.
6 is a flowchart showing a first modification of the operation in S50 shown in FIG.
FIG. 7 is a flowchart showing a second modification of the operation in S50 shown in FIG.
FIG. 8 is a block diagram showing a modified example of the processing circuit 14;
9 is a cross-sectional view illustrating a configuration of a display unit 110. FIG.
[Explanation of symbols]
10 IC card 18 Capacitor (power storage unit)
20 wireless transmission device 110 display unit 120 power control unit 130 face image holding unit 140 identification information holding unit 150 public key reception unit 160 decryption unit 170 display control unit 180 transmission unit

Claims (9)

An IC card that operates with power received wirelessly from outside,
A face image holding unit for holding the face image of the owner who owns the IC card;
A display unit provided on the surface of the IC card;
A display control unit that displays the face of the owner on the display unit using the face image held by the face image holding unit when the power is received wirelessly;
An identification information holding unit for storing identification information of the owner ,
The display control unit receives a purpose of use of the IC card when the identification information is read from the identification information storage unit, and displays the face image on the display unit according to the purpose of use. IC card characterized by determining whether or not . The face image holding unit stores a moving image of the face image,
The IC card according to claim 1, wherein the display control unit reads the moving image from the face image holding unit, and causes the display unit to display the owner's face as a moving image.   3. The IC card according to claim 2, wherein the face image holding unit stores a moving image obtained by sequentially imaging the face of the owner from different directions. The face image holding unit holds a plurality of face images with different facial expressions,
The display control unit sequentially reads the plurality of face images from the face image holding unit, and causes the display unit to display a plurality of faces of the owner having different facial expressions based on the respective face images. The IC card according to claim 1, wherein The face image holding unit stores three-dimensional data of the face image;
2. The IC card according to claim 1, wherein the display control unit displays the face of the owner on the display unit while changing the orientation using the three-dimensional data. A power storage unit for storing a part of the power received wirelessly;
The display unit displays the face image using the power stored in the power storage unit for a time necessary for a person to visually recognize the face image after the power cannot be received wirelessly. The IC card according to claim 1. The power control for providing the power stored in the power storage unit to the display unit and shutting off the supply of the power to at least a part of the display control unit after the power cannot be received wirelessly The IC card according to claim 6 , further comprising a unit.   2. The display unit according to claim 1, wherein the display unit includes a light emitter and a phosphor that emits light after the light emitter has finished emitting light and displays the face image displayed on the display unit. IC card. The face image holding unit holds the face image encrypted with the private key of the owner,
An identification information holding unit for holding identification information of the owner;
A public key receiving unit for receiving the owner's public key searched based on the identification information of the owner;
A decrypting unit that decrypts the face image based on the public key;
The IC card according to claim 1, wherein the display control unit causes the display unit to display the face of the owner using the face image decoded by the decoding unit.

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