Data Hiding Scheme in Quad Channel Images using Square Block Algorithm

Steganography is a process of concealing the important information in a digital media which acts as a cover. A data concealing scheme in color images using both alpha and non-alpha channels is designed and implemented without decreasing the image quality and with minimal distortion. In the designed algorithm, data concealing in images is done using square block algorithm. The secret digits which are obtained in the implementation part of the algorithm are concealed in the cover pixel pairs with the help of reference matrix. Various security measures are calculated and the obtained results are found to be quite promising.