METHOD FOR ATTRIBUTING IDENTIFIERS TO OBJECTS AND DISCRIMINATION OF SAID OBJECTS BASED ON THE ATTRIBUTED IDENTIFIERS

摘要

The present invention relates essentially to a method of allocating identifiers (Idij) to objects (Oij), and of discriminating said objects (Oij) on the basis of the identifiers allocated, characterized in that said method comprises in particular the various steps consisting in: - allocating (200) an identifier (Idij) to each object of a plurality of objects of the set of objects by carrying out the following operations: - for each sensitive object (Ois), carrying out an operation of calculating a signature by means of a determined signature function involving a signature key (Kp), at least one public parameter (X) associated with the sensitive object considered (Ois), then allocating as identifier an identification number comprising at least the calculated signature; - for each common object (Oie), allocating as identifier an identification number distinct from the identifiers of the other common objects without carrying out the signature calculation operation carried out for each sensitive object, the identifier of the common object thus being an identifier not signed with the determined signature function; - transmitting (104) the identifier of the object to a discriminating apparatus (203), possessing a key (?p') for verification of each signature calculated for the sensitive objects, so as to discriminate the identifiers allocated to each object of the plurality of objects so as to construct at least one first group of objects and one second group of distinct objects.