Block encryption device using auxiliary conversion

Systeme de chiffrage de blocs utilisant la conversion auxiliaire

Abstract

A data regular conversion unit (FL) (251) and a data reverse conversion unit (FL-1) (273) are arranged in point symmetry with respect to a nonlinear data conversion unit (220), and a data regular conversion unit (FL) (253) and a data reverse conversion unit (FL-1) (271) are arranged in point symmetry with respect to the nonlinear data conversion unit (220), thereby enabling a single circuit to function as both an encryption part (200) and a decryption part (500).
Une unité de conversion directe de données (FL) (251) et une unité de conversion inverse de données (FL-1)(273) sont disposées symétriquement par rapport à une unité de conversion de données non linéaires (220); une unité de conversion directe de données (FL) (253) et une unité de conversion inverse de données (FL-1)(271) sont disposées symétriquement par rapport à une unité de conversion de données non linéaires (220), ce qui permet à un circuit unique fonctionner comme une partie de chiffrage (200) et une partie de déchiffrage (500).

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