一个基于LFSR和FCSR的序列密码系统

A Generation System of Stream Cipher Based on LFSR and FCSR

目的:研究一种级联并反馈的序列密码系统。方法:用 LFSR(Linear Feedback Shift Register)和 FC-SR(Feedback with Carry Shift Register)的周期和复杂度理论,设计并研究一个基于 LFSR 和 FCSR 的序列密码系统。结果:得到了长周期、高线性复杂度的序列密码系统。结论:用 LFSR 和 FCSR 级联并反馈的方法得到的序列密码.具有更长的周期和更高的复杂度,更难以分析,具有较高的安全性。

Aim:A Stream Cipher with connection and feedback is studied.Method:According to the theory of period and span of LFSR and FCSR,a generation system of stream cipher based on LFSR and FCSR is provided,Results:A stream cipher with long period and high linear span is obtained.Conclusion:The stream ciphers based on the connection and feedback of LFSR and FCSR have long period and high span and it is more difficult to attack them than LFSR and FCSR.They have high security.