On the m-Parallel Nonlinear Combine Functions for the Parallel Stream Cipher

In this paper, we propose the high-speed implementation of four types of nonlinear combiners using by PS-LFSR(Parallel-Shifting or Parallel- Structured LFSR): m-parallel nonlinear combiner without memory, m-parallel nonlinear combiner with memories, m-parallel nonlinear filter function, and mparallel clock-controlled function. In addition, we propose an implementation example of the m-parallel stream cipher, and determine its cryptographic security and performance.