Research on digital media image encryption algorithm based on Logistic chaotic map

摘要

In order to overcome the problems of low key sensitivity and poor encryption effect in traditional digital media image encryption algorithm, a digital media image encryption algorithm based on Logistic chaotic map is proposed. Based on the chaotic mapping model, the domain of the model is transformed according to the topological conjugate structure, and the mapping information entropy is obtained. The Logistic chaotic equation is selected to generate the key sequence, and the correlation coefficient between adjacent pixels of digital media image is calculated. Based on the correlation coefficient and encryption random sequence, the state equation of digital media image encryption system model is constructed to complete the digital media image encryption. Experimental results show that compared with the traditional encryption algorithm, the proposed encryption algorithm has higher key sensitivity and encryption effect, and can effectively improve the security of digital media images.