This secured of reconstruction of a measurement of the reference database of a confidential from a measurement noisy this gives, in particular for the generation of a cryptographic loops

摘要

The present invention relates to a security process for reconstruction of a reference measurement of a confidential data on the basis of a measured noisy data. The method proposes a phase of enrolment of an item of reference w n numbers, comprising at least the following steps: ▪ select an error correcting code c of a length l of greater than or equal to n; ▪ generate (202) a given width w, by increasing the size of the reference data, w and l - n numbers comprising a key s; ▪ select a word c of the error correcting code c selected; ▪ generate (204) the data item s of the reconstruction, by combining the word c with the said given width w . In particular, the invention applies to the authentication of the individuals and to the generation of coded keys, for example, a biometric data or the physical characteristics which are intrinsic to an electronic component.