一种新型序列密码的设计与实现

Design and Implementation of a New Stream Cipher

基于经典的序列密码发生器,提出了一种可控序列密码发生器,该设计结合了LFSR和FCSR的代数特性,获得更大的混淆。由该方法产生的序列具有均匀性好、相关性小的特点;并用FPGA对加密解密系统加以实现,最终的实现结果表明该方法资源消耗少、加密速度快。该密码系统能够应用于网络安全等领域。

Based on classical stream cipher algorithms, this paper proposes a new steam cipher generator which can generate controlled pseudorandom sequences and also this generator combines the good characters of LFSR and FCSR to make the sequences have good linear complexity, and the sequences generated by the system have a high linear complexity. In the end realize the new encryption system on FPGA board, the results shows this system has a high speed on encryption and uses limited resources. The system can be employed in Intemet security.