Apparatus and method for biometric registration and authentication
A biometric register includes: a feature extraction unit for performing preprocessing for a fingerprint to extract a feature point m for the fingerprint; a transformation function generation unit for generating a transformation function which is composed of an arbitrary rotation matrix and an arbitrary vector; and a template generation unit for transforming a coordinate of the feature point m using the generated transformation function, and organizing a fuzzy vault using a randomly generated fake feature point and a feature point m 1 applied by the transformed coordinate, thereby generating a one-time template.
1. A biometric register, comprising:
a feature extraction unit for performing preprocessing for a fingerprint to extract a feature point m for the fingerprint;
a transformation function generation unit for generating a transformation function which is composed of an arbitrary rotation matrix and an arbitrary vector; and
a template generation unit for transforming a coordinate of the feature point m using the generated transformation function, and organizing a fuzzy vault using a randomly generated fake feature point and a feature point m 1 applied by the transformed coordinate, thereby generating a one-time template, wherein the transformed function is represented by
A
1
=
(
cos
α
1
-
sin
α
1
sin
α
1
cos
α
1
)
,
b
1
=
(
b
11
b
12
)
,
wherein A 1 is a rotation matrix and b 1 is a vector, and wherein the coordinate of the feature point m is transformed by
w 1 =A 1 w+b 1 ,
wherein w 1 is the transformed coordinate of the feature point m, w is the coordinate of the feature point m.
2. The biometric register of claim 1 , further comprising:
a database for storing the one-time template; and
a storage unit for storing the transformed function.
3. The biometric register of claim 2 , wherein the storage unit is one of IC (integrated circuit) card, a memory, and a hard disk.
4. The biometric register of claim 2 , further comprising an information processing unit for providing the transformed function stored in the storage unit and the one-time template stored in the database for use in an authentication via a communication network as requested.
5. The biometric register of claim 4 , wherein the information processing unit updates the transformed function and the one-time template using information provided from the authenticator.
6. A biometric registration method, comprising:
receiving a fingerprint image for registration;
performing preprocessing for the fingerprint image to extract a feature point m of the fingerprint image;
transforming a coordinate of the feature point m using a transformation function composed of an arbitrary rotation matrix and an arbitrary vector; and
organizing a fuzzy vault using a randomly generated fake feature point and a feature point m 1 applied by the transformed coordinate to generate a one-time template for the fingerprint image, wherein the feature point m is transformed by
w 1 =A 1 w+b 1 ,
wherein, A 1 is a rotation matrix, b 1 is a vector, w 1 is the transformed coordinate of the feature point m, and w is the coordinate of the feature point m.
7. The biometric registration method of claim 6 , further comprising:
storing the transformation function and the one-time template.
8. The biometric registration method of claim 6 , wherein the fuzzy vault is organized by generating an arbitrary polynomial expression and projecting the feature point m 1 onto a point on the polynomial expression and the fake feature point onto a point outside of the polynomial expression.