Messages are hidden in the least significant bits of the
8-bit binary strings representing the color numbers; hence
the abbreviated name for this method is “lsb” steganography.
Each character in a message has a binary representation
under the ASCII (American Standard Code for
Information Interchange) character system, which assigns
characters with integer values between 0 and 255.
This system represents a way to express all necessary
single character letters, numbers, punctuations, symbols,
etc. for general communication purposes. The pixel is
capable of representing 224 or 16,777,216 color values. If
we use the lower 2 bits of each color channel to hide data
as shown in Figure 1.