Biometric Authentication Apparatus, Biometric Authentication System, IC Card and Biometric Authentication Method
First Claim
1. A biometric authentication apparatus for identifying a subject person by using biometric information of a user, comprising:
- a biometric information sensor for detecting biometric information;
a processing unit for executing biometric authentication; and
a memory for storing data, wherein;
said memory stores a remaining trial number whose value is reduced each time biometric authentication performed by said processing unit fails; and
said processing unit generates a lower limit value smaller than a remaining trial number at the start of biometric authentication, executes biometric authentication until the reduced remaining trial number becomes equal to or smaller than said lower limit value, and generates alarm data for alarming said user when the reduced remaining trial number is equal to or smaller than said lower limit value.
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Accused Products
Abstract
A biometric authentication apparatus for identifying a subject person by using biometric information of a user has memories and a processing unit for performing biometric authentication. The memories and store a remaining trial number whose value is reduced each time biometric authentication fails. The processing unit generates a lower limit value smaller than the remaining trial number at the start of biometric authentication, performs biometric authentication until the reduced remaining trial number becomes equal to or smaller than the lower limit value, and generate alarm data for issuing alarm to the user when the reduced trial number becomes equal to or smaller than the lower limit value.
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Citations
11 Claims
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1. A biometric authentication apparatus for identifying a subject person by using biometric information of a user, comprising:
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a biometric information sensor for detecting biometric information;
a processing unit for executing biometric authentication; and
a memory for storing data, wherein;
said memory stores a remaining trial number whose value is reduced each time biometric authentication performed by said processing unit fails; and
said processing unit generates a lower limit value smaller than a remaining trial number at the start of biometric authentication, executes biometric authentication until the reduced remaining trial number becomes equal to or smaller than said lower limit value, and generates alarm data for alarming said user when the reduced remaining trial number is equal to or smaller than said lower limit value. - View Dependent Claims (2, 3, 4)
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5. A biometric authentication system comprising:
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an IC card; and
a biometric authentication apparatus for identifying a subject person through biometric authentication using biometric information of a user, by communicating with said IC card, wherein;
said IC card has a first communication unit for communicating with said biometric authentication apparatus, a first memory for storing data, and a first processing unit for performing biometric authentication, wherein said first memory stores a remaining trial number whose value is reduced each time biometric authentication by said first processing unit fails; and
said biometric authentication apparatus has a second communication unit for communicating with said biometric authentication apparatus and a second processing unit for performing biometric authentication, wherein said second processing unit generates a lower limit value smaller than a remaining trial number at the start of biometric authentication, executes biometric authentication until the reduced remaining trial number becomes equal to or smaller than said lower limit value, and generates alarm data for alarming said user when the reduced remaining trial number is equal to or smaller than said lower limit value. - View Dependent Claims (6)
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7. An IC card for identifying a subject person through biometric authentication using biometric information of a user, comprising:
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a communication unit for communicating with an external;
a memory for storing data regarding biometric authentication; and
a processing unit for performing biometric authentication, wherein;
said memory stores first biometric information of said user, a biometric authentication threshold value which is a reference value to be used when a failure or a success of biometric authentication of said user is judged by a magnitude of a value, and a change detection threshold value which is a reference value to be used when a presence or an absence of a change detection of said first biometric information of said user is judged by a magnitude of a value; and
said processing unit acquires externally second biometric information of said user, compares said first biometric information and the acquired second biometric information to calculate an inconsistency degree quantitatively representative of a difference therebetween, and if the calculated inconsistency degree is smaller than said biometric authentication threshold value and larger than said change detection threshold value, generates notice data for notifying said user of a change detection of said first biometric information.
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8. An IC chip having a function of an IC card for identifying a subject person through biometric authentication using biometric information of a user, comprising:
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a communication unit for communicating with an external;
a memory for storing data regarding biometric authentication; and
a processing unit for performing biometric authentication, wherein;
said memory stores first biometric information of said user, a biometric authentication threshold value which is a reference value to be used when a failure or a success of biometric authentication of said user is judged by a magnitude of a value, and a change detection threshold value which is a reference value to be used when a presence or an absence of a change detection of said first biometric information of said user is judged by a magnitude of a value; and
said processing unit acquires externally second biometric information of said user, compares said first biometric information and the acquired second biometric information to calculate an inconsistency degree quantitatively representative of a difference therebetween, and if the calculated inconsistency degree is smaller than said biometric authentication threshold value and larger than said change detection threshold value, generates notice data for notifying said user of a change detection of said first biometric information.
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9. A biometric authentication method for performing biometric authentication by biometric information of a user by using an IC card and a biometric authentication apparatus for communicating with said IC card, wherein:
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said IC card records a remaining trial number whose value is reduced each time biometric authentication fails; and
said processing unit generates a lower limit value smaller than a remaining trial number at the start of biometric authentication, executes biometric authentication until the reduced remaining trial number becomes equal to or smaller than said lower limit value, and generates alarm data for alarming said user when the reduced remaining trial number is equal to or smaller than said lower limit value. - View Dependent Claims (10, 11)
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Specification