Biometric identification method and system
First Claim
1. A system comprising:
- a biometric data input device; and
a biometric verifier connected to the biometric data input device, wherein the biometric data input device comprises;
a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data; and
an encoder for encoding the digital biometric data using secret information to transmit encoded data to the biometric verifier, and the biometric verifier comprises;
a decoder for decoding the encoded data using the secret information to reproduce digital biometric data;
a verifier for verifying identity of the individual based on the digital biometric data.
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Accused Products
Abstract
A biometric identification system ensuring reliable and protective identification of individuals even in a system having a biometric input device and a biometric verifier are separately provided is disclosed. The biometric data input device has a biometric data sensor and an encoder that encodes digital biometric data using secret information identifying the biometric data input device to transmit encoded data to the biometric verifier. The biometric verifier decodes the encoded data using the secret information to reproduce digital biometric data. The identity of the individual is verified when the digital biometric data is a registered biometric feature of an authorized user and the biometric data input device is an authorized device.
144 Citations
29 Claims
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1. A system comprising:
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a biometric data input device; and
a biometric verifier connected to the biometric data input device, wherein the biometric data input device comprises;
a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data; and
an encoder for encoding the digital biometric data using secret information to transmit encoded data to the biometric verifier, and the biometric verifier comprises;
a decoder for decoding the encoded data using the secret information to reproduce digital biometric data;
a verifier for verifying identity of the individual based on the digital biometric data. - View Dependent Claims (2, 3)
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4. A system comprising:
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at least one biometric data input device; and
a biometric verifier connected to the at least one biometric data input device, wherein each of the at least one biometric data input device comprises;
a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data; and
an encryptor for encrypting the digital biometric data using an encryption key to transmit encrypted data to the biometric verifier, wherein the encryption key identifies the biometric data input device, and the biometric verifier comprises;
a table storing an encryption key corresponding to each of said at least one biometric data input device;
a decryptor for decrypting the encrypted data using the encryption key corresponding to the biometric data input device to reproduce digital biometric data;
a comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a comparison result; and
a determiner for determining whether the individual is an authorized person, based on the comparison result and correctness of the digital biometric data decrypted by the decryptor. - View Dependent Claims (5, 6)
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7. A system comprising:
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at least one biometric data input device; and
a biometric verifier connected to the at least one biometric data input device, wherein each of the at least one biometric data input device comprises;
a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
a watermark encoder for embedding secret information as a watermark in the digital biometric data to produce watermarked biometric data;
an encryptor for encrypting the watermarked biometric data to produce encrypted data; and
a transmitter for transmitting the encrypted data and a device identification identifying the biometric data input device to the biometric verifier, and the biometric verifier comprises;
a table storing secret information corresponding to a device identification for each of said at least one biometric data input device;
a decryptor for decrypting the encrypted data to produce watermarked digital biometric data;
a watermark decoder for separating digital biometric data and watermark data from the watermarked digital biometric data decrypted by the decryptor;
a first comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
a second comparator for comparing the watermark data separated by the watermark decoder with secret information corresponding to the device identification identifying the biometric data input device to produce a secret information comparison result; and
a determiner for determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result. - View Dependent Claims (8)
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9. A system comprising:
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at least one biometric data input device; and
a biometric verifier connected to the at least one biometric data input device, wherein each of the at least one biometric data input device comprises;
a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
a watermark encoder for embedding secret information as a watermark in the digital biometric data to produce watermarked biometric data;
a first encryptor for encrypting the watermarked biometric data to produce encrypted biometric data;
a second encryptor for encrypting the secret information using a public key of asymmetric encryption scheme to produce encrypted secret information; and
a transmitter for transmitting the encrypted biometric data and the encrypted secret information, and the biometric verifier comprises;
a first decryptor for decrypting the encrypted biometric data to produce watermarked digital biometric data;
a second decryptor for decrypting the encrypted secret information to produce received secret information;
a watermark decoder for separating digital biometric data and watermark data from the watermarked digital biometric data decrypted by the decryptor;
a first comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
a second comparator for comparing the watermark data separated by the watermark decoder with the received secret information to produce a secret information comparison result; and
a determiner for determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result. - View Dependent Claims (10, 11, 12)
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13. A biometric data input device connected to a biometric verifier, comprising:
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a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
a memory storing an encryption key identifying the biometric data input device; and
an encryptor for encrypting the digital biometric data using the encryption key to transmit encrypted data to the biometric verifier. - View Dependent Claims (14, 15)
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16. A biometric data input device connected to a biometric verifier, comprising:
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a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
a memory storing secret information corresponding to the biometric data input device;
a watermark encoder for embedding the secret information as a watermark in the digital biometric data to produce watermarked biometric data;
an encryptor for encrypting the watermarked biometric data to produce encrypted data; and
a transmitter for transmitting the encrypted data and a device identification identifying the biometric data input device to the biometric verifier. - View Dependent Claims (17, 18)
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19. A biometric data input device connected to a biometric verifier, comprising:
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a biometric data sensor for inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
a watermark encoder for embedding secret information as a watermark in the digital biometric data to produce watermarked biometric data;
a first encryptor for encrypting the watermarked biometric data to produce encrypted biometric data;
a second encryptor for encrypting the secret information using a public key of asymmetric encryption scheme to produce encrypted secret information; and
a transmitter for transmitting the encrypted biometric data and the encrypted secret information. - View Dependent Claims (20)
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21. A biometric verifier connected to at least one biometric data input device, comprising:
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a table storing an encryption key corresponding to each of said at least one biometric data input device;
a decryptor for decrypting encrypted data using the encryption key corresponding to a biometric data input device to reproduce digital biometric data, wherein the encrypted data is received from the biometric data input device;
a comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a comparison result; and
a determiner for determining whether the individual is an authorized person, based on the comparison result and correctness of the digital biometric data decrypted by the decryptor.
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22. A biometric verifier connected to at least one biometric data input device, comprising:
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a table storing secret information corresponding to a device identification for each of said at least one biometric data input device;
a decryptor for decrypting encrypted data to produce watermarked digital biometric data, wherein the encrypted data is received from a biometric data input device;
a watermark decoder for separating digital biometric data and watermark data from the watermarked digital biometric data decrypted by the decryptor;
a first comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
a second comparator for comparing the watermark data separated by the watermark decoder with secret information corresponding to the device identification identifying the biometric data input device to produce a secret information comparison result; and
a determiner for determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result.
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23. A biometric verifier connected to at least one biometric data input device, comprising:
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a first decryptor for decrypting encrypted biometric data to produce watermarked digital biometric data, wherein the encrypted data is received from a biometric data input device;
a second decryptor for decrypting encrypted secret information to produce received secret information, wherein the encrypted secret information is received from the biometric data input device;
a watermark decoder for separating digital biometric data and watermark data from the watermarked digital biometric data decrypted by the decryptor;
a first comparator for comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
a second comparator for comparing the watermark data separated by the watermark decoder with the received secret information to produce a secret information comparison result; and
a determiner for determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result.
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24. In a system comprising:
- a biometric data input device; and
a biometric verifier connected to the biometric data input device, a method for verifying identity of an individual, comprising the steps of;
at the biometric data input device, a) inputting as biometric data a physical characteristic of an individual to produce digital biometric data; and
b) encoding the digital biometric data using secret information to transmit encoded data to the biometric verifier, and at the biometric verifier, c) decoding the encoded data using the secret information to reproduce digital biometric data;
d) verifying identity of the individual based on the digital biometric data. - View Dependent Claims (25)
- a biometric data input device; and
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26. In a system comprising:
- a biometric data input device; and
a biometric verifier connected to the biometric data input device, a method for verifying identity of an individual, comprising the steps of;
at the biometric data input device, a) inputting as biometric data a physical characteristic of an individual to produce digital biometric data; and
b) encrypting the digital biometric data using an encryption key to transmit encrypted data to the biometric verifier, wherein the encryption key identifies the biometric data input device, and at the biometric verifier, c) storing an encryption key corresponding to each of said at least one biometric data input device;
d) decrypting the encrypted data using the encryption key corresponding to the biometric data input device to reproduce digital biometric data;
e) comparing a feature of the digital biometric data against previously registered biometric features to produce a comparison result; and
f) determining whether the individual is an authorized person, based on the comparison result and correctness of decrypted digital biometric data. - View Dependent Claims (27)
- a biometric data input device; and
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28. In a system comprising:
- a biometric data input device; and
a biometric verifier connected to the biometric data input device, a method for verifying identity of an individual, comprising the steps of;
at the biometric data input device, inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
embedding secret information as a watermark in the digital biometric data to produce watermarked biometric data;
encrypting the watermarked biometric data to produce encrypted data; and
transmitting the encrypted data and a device identification identifying the biometric data input device to the biometric verifier;
at the biometric verifier, storing secret information corresponding to a device identification for each of said at least one biometric data input device;
decrypting the encrypted data to produce watermarked digital biometric data;
separating digital biometric data and watermark data from decrypted watermarked digital biometric data;
comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
comparing the separated watermark data with secret information corresponding to the device identification identifying the biometric data input device to produce a secret information comparison result; and
determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result.
- a biometric data input device; and
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29. In a system comprising:
- a biometric data input device; and
a biometric verifier connected to the biometric data input device, a method for verifying identity of an individual, comprising the steps of;
at the biometric data input device, inputting as biometric data a physical characteristic of an individual to produce digital biometric data;
embedding secret information as a watermark in the digital biometric data to produce watermarked biometric data;
encrypting the watermarked biometric data to produce encrypted biometric data;
encrypting the secret information using a public key of asymmetric encryption scheme to produce encrypted secret information; and
transmitting the encrypted biometric data and the encrypted secret information, and at the biometric verifier, decrypting the encrypted biometric data to produce watermarked digital biometric data;
decrypting the encrypted secret information to produce received secret information;
separating digital biometric data and watermark data from the decrypted watermarked digital biometric data;
comparing a feature of the digital biometric data against previously registered biometric features to produce a feature comparison result;
comparing the separated watermark data with the received secret information to produce a secret information comparison result; and
determining whether the individual is an authorized person, based on the feature comparison result and the secret information comparison result.
- a biometric data input device; and
Specification