This book is based on research work during Master of Technology programme in Computer Science and Engineering from Rajasthan Technical University, Kota, Rajasthan (India). This research works was submitted in 2014 for fulfilment of Master of Technology. Book contains existing approaches of text, image, audio, video Steganography, Proposed approach of embedding audio data in RGB image using circle equation. This book also describes algorithms of the procedure and experimental work on Matlab. Different image file format were used to find efficient procedure of steganography audio data in RGB...