Patent ID: 8634066
Filing Date: 2014-01-21
Classification: A61B,G06K,G07D,H04L

Abstract:
1. A method for authenticating an object, comprising: determining a distribution of elements physically associated with an object having a plurality of the associated elements; verifying that each physically associated element has a predetermined optical characteristic which is not representable as a CIE tristimulus value due to at least one of dichrosim, fluorescence, phosphorescence, refraction, diffraction, lasing, and hyperspectral color characteristics; normalizing feature metrics of the determined distribution of elements using a normalization transform; verifying a correspondence of the determined distribution of elements using a cryptographically authenticated secure digital signature code from a cryptographic one-way trap door function, from which a previously determined distribution of elements of the object cannot be ascertained, wherein the digital signature code is pre-encoded to provide a tolerance to a predefined variation between the previously determined distribution and the determined distribution; generating an output selectively in dependence on the verifying, wherein said verifying is tolerant to at least a loss of or distortion of at least one element.