Method for extracting random signatures from a material element and method for generating a decomposition base to implement the extraction method

摘要

The present invention concerns a method for extracting a random signature from a subject material element, comprising:
a phase to generate at least one acquisition vector of structural characteristics of at least one region of the subject material element,a phase to generate at least one random signature vector from the acquisition vector, the random signature vector comprising:
at least one random component having a stable nature so that its value may be found on each implementation of the method on one same region of the subject material element,and/or at least one random component having an unstable nature so that its value is likely to vary random fashion on each implementation of the method on one same region of the subject material element,use of the random signature vector as random signature.

主权项

1. A method for generating a decomposition base which can be used to extract a random signature from a subject material element, comprising the following steps:
generating N acquisition vectors of structural characteristics of at least one region of an at least one material element separate from the subject material element and/or from the subject material element itself, analysing all the acquisition vectors using statistical methods to obtain the decomposition base formed of decomposition vectors enabling the representation of each acquisition vector in the form of an image vector of which each component corresponds to the contribution of a decomposition vector in the acquisition vector, analysing at least part of the decomposition vectors to identify that or those decomposition vectors, called common or certain contribution decomposition vectors, which will be at the origin of highly determinist and/or common components to all image vectors obtained using the decomposition base, and saving the decomposition base.