# US 7,610,492 B2 · Biometric authentication device, biometric information authentication method, and program

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- Number: US 7,610,492 B2
- Document ID: US7610492B2
- Status: Granted
- Kind: B2
- Application number: 11/118,493
- Filed: 2005-05-02
- Published: 2006-04-13
- Granted: 2009-10-27
- Earliest claimed: 2004-10-08
- Assignees: Fujitsu Limited; Fujitsu Frontech Limited
- Inventors: Kiyotaka Awatsu; Sagiri Okamura; Takumi Kishino; Yasuyuki Higashiura; Takahiro Kudo; Toshinori Makino
- Web page: https://patentgrep.com/patent/US7610492B2

## CPC

- G07C 9/257: {electronically (G07C9/26 takes precedence)}
- G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints
- G06F 21/34: involving the use of external additional devices, e.g. dongles or smart cards
- G06F 21/445: {by mutual authentication, e.g. between devices or programs}
- G06Q 20/341: {Active cards, i.e. cards including their own processing means, e.g. including an IC or chip}
- G06Q 20/355: {Personalisation of cards for use}
- G06Q 20/40145: {Biometric identity checks}
- G06Q 20/4097: {using mutual authentication between devices and transaction partners}
- G07F 7/1008: {Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system}
- G07F 7/1083: {Counting of PIN attempts}
- G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G07F: COIN-FREED OR LIKE APPARATUS (coin sorting G07D3/00; coin testing G07D5/00; {handling coins or paper currencies apart from payment activated apparatus G07D; payment architectures, schemes or protocols G06Q20/00})

## Abstract

A biometric authentication device has high security by preventing intra-device information from being falsified and stolen by a third party. A biometric authentication device includes a biometric information storage module, a biometric information authenticating module for individual authentication, a mutual authentication module with the terminal, a registration counter corresponding to the mutual authentication, an authentication counter corresponding to the biometric authentication, a stoppage flag set when the value of the counter is larger than a predetermined value, and authentication control module for preventing the module from operating depending on the stoppage flag.

## Claims

### Claim 1

A biometric authentication device comprising:
a biometric information storage module storing biometric information;
a biometric information authenticating module performing authentication of an individual using present biometric information acquired from the individual when performing individual authentication and the biometric information stored in said biometric information storage module;
a mutual authentication module mutually authenticating, before storing the biometric information in said biometric information storage module, validity with a connected processing device for acquiring the biometric information to be stored in said biometric information storage module;
a registration counter counted up when the validity with the connected processing device for acquiring the biometric information to be stored in said biometric information storage module is not authenticated in the authentication by said mutual authentication module;
an authentication counter counted up when the validity of the individual is not authenticated in the authentication of the individual by said biometric information authenticating module;
a stoppage flag set when said registration counter or said authentication counter comes to a predetermined value; and
an authentication control module performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing said biometric information authenticating module from executing the authentication process when said stoppage flag is set.

### Claim 2 (depends on 1)

A biometric authentication device according to claim 1, wherein said biometric information storage module can be read from outside, and
said registration counter, said authentication counter and said stoppage flag can not be read from outside.

### Claim 3

A biometric authentication method utilizing biometric information, comprising the steps of:
acquiring biometric information of an individual from a first processing device and storing the biometric information in a biometric information storage module;
authenticating present biometric information acquired from a second processing device with the biometric information stored in said biometric information storage module to authenticate the individual;
authenticating, before storing the biometric information in said biometric information storage module, validity with said first processing device for acquiring the biometric information to be stored in said biometric information storage module, mutually;
counting up a registration counter when the validity with said first processing device for acquiring the biometric information to be stored in said biometric information storage module is not authenticated by the mutual authentication;
counting up an authentication counter when the validity of the individual is not authenticated in the authentication when executing the individual authentication;
setting a stoppage flag when said registration counter or said authentication counter comes to a value larger than a predetermined value; and
performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing the authentication of the biometric information when performing the individual authentication.

### Claim 4

A computer readable medium having a program stored therein for causing a computer to execute authentication operations utilizing biometric information, the authentication operations comprising:
acquiring biometric information of an individual from a first processing device and storing the biometric information in a biometric information storage module;
authenticating present biometric information acquired from a second processing device with the biometric information stored in said biometric information storage module to authenticate the individual;
authenticating, before storing the biometric information in said biometric information storage module, validity with said first processing device for acquiring the biometric information to be stored in said biometric information storage module, mutually;
counting up a registration counter when the validity with said first processing device for acquiring the biometric information to be stored in said biometric information storage module is not authenticated by the mutual authentication;
counting up an authentication counter when the validity of the individual is not authenticated in the authentication when executing the individual authentication;
setting a stoppage flag when said registration counter or said authentication counter comes to a value larger than a predetermined value; and
performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing the authentication of the biometric information when performing the individual authentication.

### Claim 5

An IC card comprising:
a biometric information storage module storing biometric information;
a biometric information authenticating module performing authentication of an individual using present biometric information acquired from the individual when performing individual authentication and the biometric information stored in said biometric information storage module;
a mutual authentication module mutually authenticating, before storing the biometric information in said biometric information storage module, validity with a connected processing device for acquiring the biometric information to be stored in said biometric information storage module;
a registration counter counted up when the validity with the connected processing device for acquiring the biometric information to be stored in said biometric information storage module is not authenticated in the authentication by said mutual authentication module;
an authentication counter counted up when the validity of the individual is not authenticated in the authentication of the individual by said biometric information authenticating module;
a stoppage flag set when said registration counter or said authentication counter comes to a predetermined value; and
an authentication control module performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing said biometric information authenticating module from executing the authentication process when said stoppage flag is set.