SECURE PHOTO SHARING USING HASH-MSB STEGANOGRAPHY WITH DWT AND RGB PIXEL SHUFFLING ENCRYPTION ALGORITHMS

The proposed algorithm ensure the encryption and decryption using DWT and RGB pixel shuffling with steganography by using hash-most significant Bit (HMSB) that make use of hash function to be developed significant way to insert data bits in MSB bits of RGB pixels of cover image. The security evaluations are presented by calculating a peak signal to noise ratio and mean square error. Secret image, PSNR is infinity and MSE is 0. For cover image, PSNR is about 63 dB and MSE is about 0.03.The results show that high level of the similarity exists between the stego-images and cover images and the same is for secret images and extracted image as represented also in Histogram Analysis of secret images.We propose a novel method for key generation by using nearest prime pixels. Further 2's complement and logical operations are performed to generate decrypted image. The final decrypted image is generated by representing pixels in matrix form and data is retrieved in column wise.