Steganography a Technique to Hide Information within an Image

Abstract

Steganography is the science and art of secret
communication between two parties that seek
to conceal the content of their messages. It is a
technology that embeds information into
cover photos without losing information after
embedding. Steganography is the technique
and method of hiding a message so that no
one but the sender and receiver will suspect
how the message survived. This article
compares two different techniques. The first
technique uses the least significant bit (LSB)
without encryption or compression. Now in
the second method, the encrypted message is
first encrypted and then the least significant
bit is used. The image is then transformed
into the frequency domain using a Discrete
Cosine Transform (DCT). The LSB algorithm
is applied in the local domain where the
image parts corresponding to the payload are
embedded in the least significant parts of the
overlay image and the image is embedded in
the least significant parts of the overlay image
to generate a steganographic image. The DCT
algorithm is appliedin the frequency domain
and transforms from the steganographic
image domain to the spatial domain where
the image title is interpolated to the least
significant parts of the image. This white
paper mainly provides an overview of
steganography requirements benefits and
related technologies. This white paper shows
which steganographic methods are most
effective for which requirements are met and
which applications are most compatible with
which steganographic methods