What is steganography?
Technique of hidden or covered writing
It is different from cryptography
We conceal our message inside a cover
Steganography’s goal is to keep the presence
of a message secret
Figure 1: Steganographic
Types of steganography
Our secret message may be the 1st or nth
character of the
Example-Susan eats truffles. Under pressure,
that helps everything before 0wning Major
real or secret message “Set Up the b0MB”
Tool:snow- used to conceal messages in
ASCII text by appending white-space to the
end of lines.
In image steganography we hide our
information bits in image.
-Least significant bit insertion :-
In this method the
LSB of a byte is replaced with an M’s bit. To
the human eye ,the resulting image will look
identical to the cover object.
Messages can be hidden in common audio
formatted files or the audio itself. It is more
difficult process than image steganography.
1. Transmitting a message in the human-
2. Digitally embedding a message into an audio
-Tool: S-Tool 4
Video files are generally a collection of
images and sounds.The great advantages of
video are the large amount of data that can be
hidden inside and the fact that it is a moving
stream of images and sounds. Therefore, any
small but otherwise noticeable distortions
might go by unobserved by humans because
of the continuous flow of information.