Securing Digital Image using Modified Chaotic Logistic Key

Digital image is an important data type due to the wide applications requiring this data type. Some applications require image securing to protect the image from being hacked. Increasing the complicity of the private key will enhance the security level of the image by increasing the kay space size. In this paper research a chaotic logistic map model will be used to generate the required key for data cryptography. A modification in the CLMM will be added to generate a 3D chaotic key, this key will be converted to integer key, then the obtained key will be rotated left using another information imbedded in the PK, the rotated key will be resized to match the color channel size using simple and efficient method of image resizing. Each color channel will be encrypted-decrypted separately using its own generated key. The proposed method will be implemented using various images, the obtained results will be analyzed using various methods of data analysis. The quality analysis will be use the calculated values of the quality parameters MSE, PSNR, CC and NSCR to prove the quality requirements in the encryption and decryption phase. Efficiency analysis of ET/DT and TP will be used to show the enhancements provided by the proposed method and to measure the speedup of the proposed method comparing with other existing methods of data cryptography.