Steganography and Cryptography are two popular ways of sending vital
information in a secret way. One hides the existence of the message and the
other distorts the message itself. There are many cryptography techniques
available; among them AES is one of the most powerful techniques. In
Steganography we have various techniques in different domains like spatial
domain, frequency domain etc. to hide the message. It is very difficult to
detect hidden message in frequency domain and for this domain we use various
transformations like DCT, FFT and Wavelets etc.