This book described a generalized approach pertaining to essential concepts of steganographic techniques insight into the fundamentals. Steganographic techniques are illustrated using flow diagram, algorithms, and examples along with various parametric tests like PSNR, IF, Error analysis, Histogram analysis and comparison of relative performances of various techniques using number of benchmark images. The contributions are divided into two categories namely in spatial domain and frequency domain. Steganographic approaches described fall under single bit, two bits, three bits steganography...