Welcome back everyone.
In this lecture we are going to learn about steganography stagnant graphics the technique that is used
to hide malicious files for example into an existing image or BMG or any type of file.
So what stagnant Rafi is basically embedded payload bytes into the image bytes.
So for example you have image bytes are appearing do file which is represented by let's say let's say
there are certain bytes letters you x 1 1.
I'm just give me an example and see your ex 20 and then it goes on till and for example 0 x F.
So let's suppose this is an image find anything any file is just a representation of MIT's so what.
Instead note roughly what we do is that we try to embed our malicious code.
Let's say we have another file which contains 0 x 4 2 4 5 whatever it is and see your X so let's say
we just have a file that only contains two words it does not make sense but I'm just giving an example.
So what steganography technique basically does is that it tries to embed this these bytes copy and include
somewhere in the actual file.
So the actual file contains the original backup plus the malicious code but the main thing about this
is that this thing of this encoding is very hard to detect.
So and dividers for Dummies cannot easily do that.
These coatings on the front this file are image whatever it is will look exactly the same.
And it will have an embedded malicious code inside it.
And this code will be very hard to detect and there is no direct way of understanding at detecting it
unless you read the bytes properly which is a very very difficult task.
So in this section we will try to embed that in two images and then we will try to extract them and
see how steganography works.
OK see you in the next lecture then.