A METHOD FOR PROTECTING BIOMETRIC TEMPLATES, AND A SYSTEM AND METHOD FOR VERIFYING A SPEAKER´S IDENTITY

摘要

A method for protecting a biometric template, comprising the steps of:retrieving an original vector (V) representing said biometric template, said vector comprising a plurality of original elements (v₁, v₂, ..v_i.., V_n);mapping at least some elements from said original vector to a protected vector (P) comprising a plurality of protected elements (p₁, p₂, ..p_i,.., p_n-m+1), the mapping being based on multivariate polynomials defined by m user-specific coefficients (C) and exponents (E).