An enhanced image security using improved RSA cryptography and spatial orientation tree compression method

In this research, presented an enhanced image security using improved RSA cryptography and Spatial Orientation Tree Wavelet compression (STW) method for color or grayscale image. Steganography is the science of hiding secret messages so that you can be sent to target without mistrust. It is the most famous type of carrier to grip data. Firstly, input the secret message, then encrypt the message using an improved RSA algorithm. In this method, take four prime numbers for enhanced security. Using STW compression method, compress the bits of an image for utilizing the memory space. For color pictures an changed parent offspring connection and an extra stage of wavelet decomposition on RGB planes have been carried out. For embedding, encrypted message into compressed image for obtaining stego image. PSNR improvement of 83.541% was achieved at 0.177 bpp for RGB images and 2.223% for color images.