In this paper, we studied security systems for information security of several systems that use in network environment along with information society. Therefore, we designed symmetry style base mixing style cryptographic system that apply block and stream way to solve problems of complexity and lower processing speed etc. Symmetry style base mixing style cryptographic system including authentication operation holds performance that the processing speed and the calculation amount are more superior than asymmetry style. Result that design system by Synopsys 1999.10 and ALTERA MaxPlus 10.1 and do simulation, mixing style password system that we propose is that information security offers very efficient assistance and performance in necessary field in network environment.