Encryption method, decryption method, encryption/decryption method, cryptographic communications system, and computer usable medium

   
   

A product-sum type cryptosystem is employed to obtain ciphertext C=m.sub.0 D.sub.0 +m.sub.1 D.sub.1 + . . . +m.sub.K-1 D.sub.K-1 by (an) inner product(s) using a plaintext vector m=(m.sub.0, m.sub.1, . . . , m.sub.K-1) and base vectors D=(D.sub.0, D.sub.1, . . . , D.sub.K-1). D.sub.i (0.ltoreq.i.ltoreq.K-1) is set to D.sub.i =d/d.sub.i, where d=d.sub.0 d.sub.1 . . . d.sub.K-1, and any two numbers d.sub.i and d.sub.j are prime relative to each other.

Eine Produkt-Summe Art Schlüsselsystem wird eingesetzt, um verschlüsselten Text C=m.sub.0 D.sub.0 +m.sub.1 zu erhalten D.sub.1 +. . . +m.sub.K-1 D.sub.K-1 durch (ein) inneres product(s) mit einem Klartextvektor m=(m.sub.0, m.sub.1. . . , m.sub.K-1) und Unterseite Vektoren D=(D.sub.0, D.sub.1. . . , D.sub.K-1). D.sub.i (0.ltoreq.i.ltoreq.K-1) wird auf D.sub.i = d/d.sub.i, in dem d=d.sub.0 d.sub.1 eingestellt. . . d.sub.K-1 und alle mögliche zwei Zahlen d.sub.i und d.sub.j sind Hauptrelative.to.

 
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