OPTICAL IMAGE ENCRYPTION AND DATA HIDING USING DRPE AND AES ON CHAOTIC BAKEREDE IMAGE

In every communication channel or methodology now days, there is a necessity of secure transmission from sender to the authentic
receiver. In this paper a new technique for optical image encryption based on chaotic Baker map, AES and Double Random Phase
Encoding (DRPE) is presented. This technique is implemented in three layers to enhance the security level of the classical DRPE. At
first layer a pre-processing layer, which is performed with the chaotic Baker map on the original image. Then AES algorithm is used
to encrypt the image for the security and confidentiality of the image. A message is also stored in the pixels of the image. After AES
encryption the classical DRPE is done. DRPE is done using two random phase masks, one in the input plane and the other in the
fourier plane, to encrypt the primary image in to stationary white noise. MATLAB simulation experiments show that the proposed
technique enhances the security level of the DRPE, and at the same time has a better immunity to noise .Histogram analysis
,maximum deviation analysis, and irregular deviation analysis are performed to check the effectiveness of the method.