Patent ID: 7895440
Filing Date: 2011-02-22
Classification: G07C

Abstract:
1. A method of masking biometric information, comprising the steps of: Converting physical biometric information into biometric datum b having n bits; and producing a masked datum m using the following hash function: mod p, where p is a prime number, b i is the bit at position i of biometric datum b, and q i is the prime number at position i in a set of prime numbers (q i . . . q n ); wherein said method is applied to data of a biometric print, comprising the steps of determining a set of s real minutiae, which are characteristic of said print, mixing and arranging the real minutiae with t false minutiae, and forming a mixed biometric datum having n=s+t bits, such that, for any i: b b and applying the hash function to this mixed datum in order to produce a masked datum.