JP2012221264A - Ic card including biometric authentication function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable identification of a user according to biometric authentication function installed on an IC card as advantageous means, while maintaining compatibility with a conventional card in improving security of the IC card commonly used in daily life.SOLUTION: A power supply by a non-contact antenna and an optical power generation element 8, for example and a system for complementing to each other an electric double layer capacitor 6 for accumulating supply voltage quickly and a high capacity secondary battery 7 accompanied by chemical reaction, which battery 7 is slow to storing power are mounted on an IC card 1.

Description

      The present invention relates to an IC card equipped with a device that realizes an improvement in reliability related to identity verification when the IC card is used.

  An IC card equipped with an integrated circuit (IC) chip designed to perform processing and recording functions by exchanging information with an external reader is designed to authenticate information written in the card. Because it has a tumble characteristic for taking out and breaks when the chip is disassembled and analyzed, its security is greatly improved compared to a magnetic card.

However, an apparatus for extracting information from an IC chip has appeared. For this reason, in the case of bank cards and the like, introduction of a biometric authentication system such as giving biometric authentication of a hand has been started in search of stronger security.

  These biometric authentication devices are provided on the card reader device side, and registration data referred to by the biometric authentication is stored on the card service side such as a bank and provided to the reader device at the time of inquiry. Therefore, biometric authentication using a biometric authentication IC card cannot be performed with a conventional reader that is already widely used. In this conventional card reader without biometric authentication, the security of identity verification is ensured only at the security level of a conventional IC card. If the IC card with biometric authentication is lost or stolen, if the card is used with a card reader without biometric authentication, the effect with biometric authentication is lost.

  Conventional card readers without biometric authentication are widespread all over the world, and these are changed to card readers having a biometric authentication function or an IC card with a biometric authentication function is changed. Then you must be able to use it. An IC card with a biometric authentication function that can be used globally worldwide is required to be changed to a card reader having a biometric authentication function all over the world, which is more difficult to achieve than in Japan.

In addition, various procedures using cards are being automated, and individuals carry many types of cards at the same time. However, if many service functions are installed together in one card, the damage will increase if the password is stolen or the card itself is lost. Therefore, the current situation is to distribute risk by having many cards. Therefore, there is a need for a card that greatly increases security over conventional IC cards.

JP 2005-346539 (IC card with fingerprint authentication: Operated by in-house power generation by vibration) JP2000-76412 (Electronic card with fingerprint authentication and its method: mounting a fingerprint authentication system in the card and destroying the functions due to unauthorized use or expiration date) Japanese Patent Laid-Open No. 9-180036 (IC card system with identity verification function: identity authentication by the order of pressing multiple pressure sensitive switches) JP 2006-134086 (IC card with fingerprint sensor: fingerprint sensor and integrated circuit are incorporated in a bowl-shaped flat part) Japanese Patent Laid-Open No. 11-312225 (IC card with fingerprint reading authentication function: a card with a built-in device for detecting the angle and area of a finger as a measure for improving the accuracy of fingerprint authentication) JP 4-24889 (IC card with personal authentication function: IC card equipped with an authentication system using a pressure sensor that inputs finger feature information) Japanese Patent Laid-Open No. 2-118790 (IC card with fingerprint verification function: IC card having fingerprint input pad and reading authentication function):

In the problem of introducing biometric authentication as the identity verification function of the IC card 1, the power for authentication operation is applied to the IC card of the system that completes the authentication by installing the biometric authentication function regardless of the presence or absence of the biometric authentication function on the card reader side. It is necessary to install a system that supplies However, in order to realize the system in the form of a card, a device that can cope with a low voltage and a minute current and has a high power supply capability is indispensable and needs to be incorporated into a thin plate shape.

   (1) In order to support the operation of the biometric authentication function, the battery 6 without chemical reaction is mounted on the IC card 1.

(2) Capacitor 6 mounted on the card, that is, the capacitor has a capacitance of several millifarads or more, and has a larger capacity and a thin plate type than a capacitor of the type used in a conventional electronic circuit.

(3) Supporting severe power supply situations such as low voltage, minute current, and short time in combination with various power supply / power generation devices mounted on the card.

(4) Further, the operation voltage of the processing arithmetic circuit unit 4 and the sensor unit 3 used for the biometric authentication function is also suppressed, and the compatibility with the power feeding / power generation device is measured, so that the card can be mounted compactly.

  A stable biometric authentication function can be provided by stably supplying the minimum necessary power to an IC card equipped with a biometric authentication function. Moreover, a more compact and thin plate shape can be realized by compensating each other's drawbacks independently or in cooperation with various power supply / power generation devices. Furthermore, by matching the conventional IC card shape, particularly the thickness, it is possible to use an existing card reader and to realize a high security of personal authentication that has not existed before. In the non-contact type IC card 1, the reader side remains the same as before, and even if the thickness is slightly larger than the conventional one, a stable personal authentication function can be given to the IC card 1. By providing the upper limit of the thickness of the IC card 1, it is possible to store the IC card 1 in a stored item such as a user's card case.

IC card with biometric authentication for cooperative power supply of photovoltaic elements, secondary batteries and capacitors IC card with biometric authentication for cooperative power supply of removable primary battery, photovoltaic device and capacitor IC card with biometric authentication for cooperative power supply of antenna loop, secondary battery and capacitor, which is one of contactless power supply Example of encryption method by dynamic authentication of communication system connecting each part of biometric module

As a typical example, FIG. 1 shows an example of a biometric authentication IC card 1 for cooperative power feeding of a photovoltaic element 8, a secondary battery 7, and a capacitor 6. Here, the secondary battery 7 and the capacitor 6 (electric double layer type, etc.) are used in parallel for storing and supplying power, but the secondary battery 7 is accompanied by a chemical reaction. Is moderate, but can handle large amounts of power. On the other hand, since the capacitor / capacitor 6 does not involve a chemical reaction, a large amount of current can flow in a short time. However, there are drawbacks such as an absolute amount of power energy and a rapid drop in voltage during operation. By combining the two, it is possible to complement each other's drawbacks. Moreover, the electrical storage to the secondary battery 7 can also be efficiently stored by supplying the electric energy accumulated in the capacitor 6 little by little. Furthermore, in the case of minute current, instantaneous power generation, etc., the capacitor 6 first stores the energy and can supply it to the secondary battery 7 having a large capacity.

In some cases, when the contact type IC card 1 is set in the card reader, the power from the card reader can be quickly taken into the capacitor and stored in the secondary battery 7 again. In addition, when the biometric authentication operation cannot be performed due to insufficient power storage in the IC card, the IC card 1 is applied to light so that power can be supplied and stored in the capacitor 6 in real time so that biometric authentication can be performed. it can.
In this case, if the storage capacity of the capacitor 6 is equal to or greater than the minimum amount for performing biometric authentication, the power recovery can be backed up in a minimum time.

  FIG. 2 shows an example in which a thin primary battery 13 is mounted on the IC card 1. Here, a button-thin primary battery is used, but by making it detachable as shown in the figure, it is possible to stabilize power feeding to each part of the biometric authentication. If the power consumption of each part of the biometric authentication is realized by a low voltage operation, it can be exchanged within the effective time of the card. In addition, the low operating voltage makes it possible to suppress the size and thickness of the power storage / power feeding device section, and increases the possibility that it can be used in the same way as conventional IC cards.

FIG. 3 shows an example in which a non-contact power feeding device 14 such as a power receiving coil is mounted on the IC card 1. Charging is possible by simply placing or placing an IC card in the vicinity of a power feeding device having a power transmission coil. In addition to preparing and using a dedicated power supply device, it is possible to supply power during near field communication such as the Felica type, and furthermore, minute energy of airborne radio waves can be combined with the capacitor / capacitor 6.

As described above, by combining several characteristic devices as a power storage / power supply system, it is possible to efficiently perform necessary power storage / power supply in a limited space on the IC card 1. .

FIG. 1 shows an example in which fingerprint authentication is used as the IC card 1 with biometric authentication. Fingerprint authentication includes a pressure sensor, an optical image sensor, a charge capacitance sensor, and the like. In any case, miniaturization and thinning have progressed, and the method of measuring the change in charge capacity can be mounted on a card equivalent to a thickness of 0.76 mmc which is compatible with a conventional IC card. In addition, the photovoltaic power generation element 8 shown here has been developed with a coating layer type, and can be merged with printing of characters and figures on the surface of the IC card. Basically, a large area is proportional to the power generation capacity. The capacitor 6 can store a larger amount of charge when the surface area is larger. It is possible to drastically increase the surface area by adsorbing organic molecules on the surface of the activated carbon electrode, such as an electric double layer capacitor, to form a dielectric. This structure is a laminated type and can be adapted to a thin card thickness equivalent to that of a conventional IC card.
If the voltage of the sensor unit for reading the biometric pattern such as the shape feature, the biometric pattern matching registration data unit 5 and the processing operation circuit unit 4 for matching / authentication thereof can be lowered, for example, it can be reduced from 2 to 3 volts to 0.9 volts. As a result, devices that can store and supply power are not only made more compact and thinner, but also can be operated in a non-powered state. This is almost a maintenance-free state, and the biometric authentication IC card capable of authenticating the user can be used with no sense of incongruity.
Further, the technology for reading information on the IC card has been advanced, and in particular, the communication conductor 10 and the processing operation between the sensor unit and the biometric pattern verification registration data unit 5 and the processing operation circuit unit 4 such as verification / authentication thereof. The communication flowing through the communication conductor 10 between the circuit unit 4 and the integrated circuit (IC) chip 2 should be encrypted. As the encryption algorithm, dynamic authentication or the like in which authentication data by random number generation as shown in FIG. 4 changes every time is applied.

The use of the IC card 1 has deeply penetrated into daily life, such as bank cards, credit cards, vehicle regulars, and prepaid cards. Although the improvement of security due to the introduction of IC has been recognized and its use has been widely recognized, there are already cases in which IC cards are also stolen. IC cards with a biometric authentication function, such as bank cards, have appeared, but their security is only effective with card readers equipped with a biometric authentication function. There is no merit. There is a strong demand for security in card use, and it is considered that the use of the present invention in which a biometric authentication function can be used even in a general card reader that is already in widespread use. Since the card itself has a biometric authentication function, a large effect can be expected even with credit cards used around the world. In addition, even a non-contact type card such as a Felica terminal that has recently started to be used can handle a large amount of money, and its high security is appreciated for the present invention.

1 IC card
2 Integrated circuit (IC) chips
3 Fingerprint authentication sensor
4 Processing operation circuit unit for verification / authentication 5 Biometric pattern verification registration data unit 6 Capacitor / capacitor 7 Secondary battery 8 Photovoltaic element (coated film type)
9 Feeder conductor 10 Communication conductor 11 between IC chip and biometric authentication unit 11 Signal connection unit 12 with IC chip Biometric authentication confirmation indicator 13 Primary battery (button thin)
14 Non-contact power feeding device (loop antenna type)

Claims (13)

An integrated circuit (IC) chip designed to perform processing and recording functions by exchanging information with an external reader is mounted, and the shape of the IC card has a shape that approximates the size of a business card except for the thickness. , An IC card with biometric authentication that integrates a sensor unit for reading biometric patterns such as fingerprints, blood vessels, and shape features for biometric authentication, a biometric pattern matching registration data unit, and a processing operation circuit unit for matching and authenticating them , Laminated type (alternating layers of electrical conductors and dielectrics), electrolytic type (the surface of the electrical conductor is a dielectric with an oxide film and combined with the electrolyte), electric double layer type (organic molecules on the surface of the activated carbon electrode) A capacitor with a structure based on the principle that can quickly store charges with a capacitor of several millifarads or more by adsorbing a dielectric) IC card having a structure as can provide power for operation assistance testimony 2. The main IC chip unit that operates the basic function of the IC card, a sensor unit related to biometric authentication related to card operation, a processing operation circuit unit such as biometric authentication, and a power supply unit such as a capacitor are embedded in the card separately. IC card having a card body structure in which a groove recess for embedding them and a communication / energization circuit connecting them are embedded in advance.
3. A method for transmitting permission / non-permission of operation of a basic function of an IC card from a biometric authentication processing operation circuit unit to a main IC chip unit and a verification / authentication result with verification registration data according to claim 1 and claim 2. An IC card that encrypts in-card communication using an encryption algorithm when it is transmitted to the arithmetic circuit
4. The IC card according to claim 1, wherein the maximum thickness of the IC card is within three times the basic thickness of the IC card 0.76 mm.
6. The method according to claim 1, wherein the IC card is applied to an IC card of a type in which 90% or more of the area is inserted and read from the card insertion slot. IC card whose maximum card thickness is partially within 30% of the basic thickness of IC card 0.76mm In claim 1, claim 2, claim 3, claim 4, claim 5, in the IC card that communicates information from the IC chip by contact, power is supplied to the IC card from the card reader through the contact part during communication, IC card with built-in device that can store charge in capacitor The function operating part according to claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6, wherein the photovoltaic element is arranged on the card surface and the photovoltaic element is mounted on the IC card. IC card that can supply power to 8. The IC card according to claim 7, wherein the photovoltaic elements are arranged in a stacked manner by a printing method, and the photovoltaic elements are configured in a free shape in combination with printing of characters and figures on the card surface. An IC card having a built-in device for taking in electric power in a non-contact manner based on a dielectric principle of an antenna according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7 or claim 8. In Claim 1, Claim 2, Claim 3, Claim 4, Claim 5, Claim 6, Claim 7, Claim 8, and Claim 9, a solid electrolytic layer is used as a secondary battery capable of simultaneously storing power. IC card with built-in plate secondary battery with thin plate structure such as thin film secondary battery and lithium ion secondary battery A thin battery such as a button battery as a primary battery according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 8, claim 8 or claim 9. IC card to be installed in the card In claim 1, claim 2, claim 3, claim 4, claim 5, claim 7, claim 8, claim 9, claim 10 and claim 11, biometric authentication for identity verification Card with the function of presenting optical signals on the card indicating the results of In claim 1, claim 2, claim 3, claim 4, claim 5, claim 7, claim 8, claim 9, claim 10 and claim 11, the basic function of the IC card IC cards with a maximum operating voltage of 0.9 volts or less for the sensor unit that reads the biometric pattern, the biometric pattern verification registration data unit, and the processing operation circuit unit such as verification / authentication thereof, excluding the integrated circuit (IC) chip