Research on Bit Level Digital Image Encryption Algorithm Based on Logistic Chaotic System
A bit level digital image encryption method based on Logistic chaotic system is proposed. Each pixel value of a grayscale image uses eight bit binary numbers, and the two dimensional gray image is converted to a one dimensional string containing 0 and 1. We generate the Logistic chaotic sequence with the given initial value, and then sort the chaotic sequence to obtain a location index. According to the location index, the original image is scrambled in bit level. The pixels fusion and pixel scrambling encryption of an image are realized simultaneously. Experiments show that the algorithm is simple, safe and efficient.