Chapter 6 Contents

6 Stream Ciphers
6.1 Introduction

6.1.1 Classification
6.2 Feedback shift registers

6.2.1 Linear feedback shift registers

6.2.2 Linear complexity

6.2.3 Berlekamp-Massey algorithm

6.2.4 Nonlinear feedback shift registers
6.3 Stream ciphers based on LFSRs

6.3.1 Nonlinear combination generators

6.3.2 Nonlinear filter generators

6.3.3 Clock-controlled generators
6.4 Other stream ciphers

6.4.1 SEAL
6.5 Notes and further references

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