Digital Image Encryption Test System Based on FPGA and Nios II Soft Core

Aiming at the problems of small key space and low anti deciphering strength of one-dimensional single chaotic image encryption algorithm, an improved encryption algorithm based on LDPC code and double Logistic chaotic system is proposed, which can expand the key space and enhance the security and anti-interference ability of the system. The digital image encryption test system based on FPGA and Nios II soft core is designed, including the overall design of hardware/software, Nios II soft core design, VGA module design, etc. The algorithm is applied to practice, and the test results are shown by VGA to verify the feasibility, reliability, and practicability of the algorithm.