NOISE ROBUST HELPER DATA SYSTEM (HDS)

摘要

The present invention discloses a method for performing authentication (AUTH) of a requester in a helper data system (HDS). Initially, there is provided a first feature vector ( (X+N) ), the feature vector comprising a vector of sets, and thereafter a permutation of the first feature vector is performed resulting in a corresponding collection of permutated feature vectors ({(X+N)'}). A collection of codes ({C'}) is generated from the collection of permutated feature vectors ({(X+N)}') using helper data (W), and finally a comparison of the collection of codes ({C'}) with a reference code (C) from a corresponding enrollment to find a match. The invention also relates to a similar method for performing enrollment (ENRL) in a helper data system (HDS), the method comprising instead a permutation of the first feature vector during enrollment resulting in corresponding collection of permutated feature vectors ({X'}).The invention is advantageous for obtaining a helper data concept that may operate on features organized as a collection of feature vectors, the feature vectors comprising of sets, such as the ones used to represent short tandem repeat (STR) profiles, and cope with a limited number of errors in profiles during authentication.