Patent ID: 8312289

Claim:
A method for authenticating the identity of a physical object (OBJ) by means of metric data using a helper data system, which helper data system during an enrolment step generates a first helper data (W 1 ) and a first control value (V 1 ) associated with metric data (X) of a reference object, the method further comprising the following verification steps: generating a first property set (S 1 ) using a noise compensating mapping (NCM) on information derived from first helper data (W 1 ) and a metric data (Y) associated with the physical object (OBJ) to be authenticated, establishing a sufficient match between the physical object (OBJ) and the reference object using the first property set (S 1 ) and the first control value (V 1 ), the method further characterized in that it comprises a step of generating an update data (WUPD) using the first helper data (W 1 ), the first property set (S 1 ) and the metric data (Y), said update data (WUPD) being used for updating the first helper data (W 1 ).