FPGA Design One Yuan Polynomial Transform Chaotic Image Encryption System Based On

Chaos is extremely sensitive to the initial values and parameters. It owns intrinsicrandomness. These characteristics enable it to meet the requirement of cryptography andbe very suitable for image encryption. With the development of techniques to decipherand attack, chaos with better characteristic for image encryption is urgently needed.However, the research work on the new chaotic system is very tough. How to design asimple method to generate chaotic sequence for image encryption with betterrandomness on the basis of existing chaotic system? In order to solve this problem, thispaper put forward an image encryption method based on the chaos transformed byunary polynomial. After the output variable of chaotic system was transformed by unarypolynomial, the purpose of increasing chaotic complexity was achieved. This paperconducted comparative study on phase space trajectory, power spectrum and LyapunovExponent to the chaos before and after unary polynomial transformation respectively.The comparative and reasoning method was combined with Matlab simulationexperiments to determine the best form of unary polynomial transformation. A varietyof measurement criteria were adopted to evaluate the chaotic image encryption effect.The unary polynomial transformation was proved feasible and effective in the meantime.In the end, this paper designed and realized the corresponding hardware modules of theimage encryption system by utilizing the programmable logic devices developmentplatform.