The Reductive Technique Of Stream Cipher

This article discuss analysis and design of sequence cipher base on linear feedback shift register, analyse the comeback to linear feedback shift register sequences, nonlinear combining sequences, nonlinear feed forward sequences systematacially Propose a method of comeback to feedback polynomial Design a of inverse matrix sequences which base on good property of m-sequences Propose idea of comeback to encrypt equipment by differential and sampling method, analyze and improve the feed forward sequences combined with m-sequencesWe propose a method of feedback polynomial comeback to bit error rate periodic sequences which obtained by linear feedback shift register, and propose a of new pseudo-random sequences which base on good property of m-sequences and theory of inverse matrix, explain it has good quality of cryptography in theoryIn field of analysis and design of nonlinear combining stream ciphers, we combine all kinds of transform equipment to simulate the course of encrypt. Check correlation of cryptograph and analyze all kinds of transform factors Then we find out the influence and effect on this cryptograph. We summarize and optimize the method of cipher key revivification about known equipment systemic At last we put forward the method of how to compute the polynomial of unknown equipment and put out the application of differential and sampling in nonlinear combining stream ciphers.In field of analysis and design of feed forward sequences, we summarize and optimize the method of cipher key revivification about known equipment systemic, at the same time put forward the method of how to compute the polynomial of unknown equipment and put out the application of differential and sampling in nonlinear feed forward ciphers , At last we analyze feed forward sequences combined with m-sequences and put forward a new kind of encrypt method which is more fit in engineering...