A Security Algorithm for Images Based on 2D Logistic Map Using Bit-level and Pixel-level Image Encryption Approaches
Manzoor Ahmad Lone, Shaima Qureshi · International Journal of Computing and Digital Systems · 2023
This paper presents a new chaos-based image encryption method using a hybrid effect of bit-level and pixel-level image encryption principles to form an encrypted digital image.In the proposed encryption scheme, the 2D logistic map generates two pseudo-random chaotic streams that are employed in an efficacious way to use the bit-level and pixel-level ideologies to encrypt the plain image.The two chaotic sequences produced by the 2D logistic map are used to create two LSB-based bit-matrices to form a bit-level perspective that helps in the scrambling of the image.Furthermore, the same two chaotic streams of the 2D logistic map are used in a cross manner at the pixel level to diffuse the image and finally form a strong cipher image.The experimental numerical results, standard reference value tests, and comparative analysis with the existing encryption methods support and validate the reliability and robustness of the proposed encryption approach.