Synthetic Image and Strange Attractor: Two Folded Encryption Approach for Secure Image Communication

Chaotic attractors are used in variety of applications especially in image encryption due to their sensitivity, confusion and diffusion properties. Such attractors are continuous form of chaos which can be described using differential equations. In this work, an image encryption technique employing Chen attractor and FPGA generated synthetic image has been discussed. Altera Cyclone II FPGA was used to generate synthetic image that consumed 438 logic elements and 34.03 mW of power consumption. The simulation was carried out on LabVIEW platform. The performance of the algorithm was evaluated through statistical (Entropy, Histogram, Correlation) and differential analyses (NPCR and UACI) for grayscale images of various sizes 128 × 128, 256 × 256 and 512 × 512 which yielded good figures.