Now let’s understand both the concept in detail.
It is a technique used to protect the data by covering the original data and/or information with some other data.
In steganography, the data used to cover the original data can be of any form. It can be images or videos or it can be a text also.
Let’s take an example to learn about steganography.
You are head of communication at your office and you found out somebody is been stealing the information form your company. You suspect one of your employees. Now you want to tell your boss about it.
But you cannot use the normal communication channel you are using as your employee can access those. And you cannot use any secret message technique because you don’t want that employee to know you suspect him.
Now, what will you do in this situation?
In this situation, you used the steganography technique. You create an image that has your message telling your boss the name of the employee stealing from your company and to get that message your boss has to read every third number in the dimension of each pixel which coincides with the alphabet.
In this way even though you send the message that is an image to everyone only your boss knew that the image concealed a message.
So the advantages of steganography are that even if data is sent to everyone only the intended person can read that data inside the data.
The different way data can be covered
It is the most primary and one of the early used steganography form.
This data which is to be sent is hidden in the text. For example, data can be hidden in the puzzle in this way everyone can see it and also solve it. But only the intended person can see it that some other data is hidden in it.
This steganography form came with the invention of computers and images.
As we all know every image is made up of pixels and every image contain thousands of pixel it is a great way of concealing a data.
Videos are nothing but a collection of images playing very fast. So videos become the ultimate steganography form as we can use every frame in the video to hide the data.
Audios have become one of the prominent ways of hiding the data because of its different pitches with up and down.