Sequence cipher realization device and sequence cipher realization method thereof

Sequence cipher realization device and sequence cipher realization method thereof

The invention relates to a sequence cipher realization device and a sequence cipher realization method thereof. The method comprises the following steps: firstly, generating a sequence source by adopting Galois-structure nonlinear feedback shift registers designed based on mixing and diffusion parts...

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Hauptverfasser: CHEN HUAJIN, ZHENG QUNXIONG, YANG DONG, ZHU XUANYONG, XU HONG, QI WENFENG, TIAN TIAN, TAN LIN
Format: Patent
Sprache:chi ; eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator CHEN HUAJIN
ZHENG QUNXIONG
YANG DONG
ZHU XUANYONG
XU HONG
QI WENFENG
TIAN TIAN
TAN LIN
description The invention relates to a sequence cipher realization device and a sequence cipher realization method thereof. The method comprises the following steps: firstly, generating a sequence source by adopting Galois-structure nonlinear feedback shift registers designed based on mixing and diffusion parts as a sequence source drive; and then, after the registers load keys, initialization vectors and constant parameters completely, carrying out idle operation for a certain number of beats, carrying out nonlinear operation on an output of the diffusion unit so that the output is taken as a key stream sequence, and carrying out exclusive or operation on the key stream sequence together with a plaintext sequence to form a ciphertext. According to the sequence cipher realization device and the sequence cipher realization method thereof disclosed by the invention, relatively less operation and hardware cost can be used; through combined use of the mixing unit and the diffusion unit, after multiple times of iterations, a
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title Sequence cipher realization device and sequence cipher realization method thereof
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