An RGB Image Encryption Supported by Wavelet-Based Lossless Compression

In this paper, the authors have proposed a method for an RGB image encryption supported by lifting scheme based lossless compression. Firstly, they have compressed the input color image using a 2-D integer wavelet transform. Then they have applied lossless predictive coding to achieve additional compression. The compressed image is encrypted by using Secure Advanced Hill Cipher (SAHC) involving a pair of involuntary matrices, a function called Mix() and an operation called XOR. Decryption followed by reconstruction shows that there is no difference between the output image and the input image.