PROCEDE CRYPTOGRAPHIQUE DE GENERATION D'UNE CLEF PUBLIQUE

摘要

The invention relates to a cryptographic method for generating a public key capable of encrypting digital data, wherein the public key corresponds to an alternating quasi-cyclic code, characterised in that said method includes: the step of generating a generatrix matrix M from the application of a Pn-block permutation matrix and a matrix D? diagonal to a quasi-cylindrical matrix Mk corresponding to an initial code; the step of generating a matrix relative to said alternating quasi-cyclic code from the stamping in several columns of said generatrix matrix M and from the selection of a sub-code on the under body of said generatrix matrix.