In this post, we will introduce the multiple ways for hiding any text
that are based on Audio, Image, Video and White text. For achieving this we
will use a method that is known as “Steganography”. The term steganography refers
to the technique of hiding secret data within an ordinary, non-secret, file or
message in order to avoid detection. So here we will check all those methods
that can help us for doing same.
Table of content
Introduction
Purpose of Steganography
Methods of Steganography
· Audio based Steganography
· Image based Steganography
· Video based Steganography
·
White text Steganography
Introduction
Steganography is the
practice of hiding a file, message, image of video in another file like message
video or audio. In general, the hidden message seems like something else like
pictures, articles and sometimes shopping list. While the practice of
encryption is to protect the content of a message alone, the style of
steganography both concerns the disclosure and content of a secret message.
Steganography covers data concealed in computer files. So, lets understand this
in a better way with the examples. First let’s understand what is the purpose
of steganography.
Purpose of Steganography
Effective communication is stegnography. At first you can encrypt and hide a private file inside a picture of another file type before sending it to somebody else.
The likelihood of being intercepted will reduce. If
you send any encrypted file to someone the other person will try to decrypt it
in many ways and possibly, he will be able to do so. But in this case, it will
reflect like a normal image and the other person will have no hint that what
can be there on the other side of the picture. So, it is always a better and
safe way of communication for those organisations where they want to protect
their selves from these kinds of attacks.
So, let’s start and see how
it works.
Audio Based Steganography
First, we will install a
software named deep sound which is meant to convert all our audio files
to some other format files. For installation please visit the link given below
Conceal Approach: Now
open the application and click on open carrier files and select
a mp3 file behind which you want to conceal the original file.
Here we have selected an
audio file behind which we will hide the data as we have done.
After selecting the file, we will now click on
add secret file and give any file here which we want to conceal. Here we
have opted for a document file.
Here you can further add one
more extra security layer which is encoding by putting a password to the file.
As you can see that we have given 123 as a password without which it won’t be
possible for the other person to open the file.
The file is created
successfully.
Now we can share this mp3 file
with the other person to continue the hidden communication in the network.
Reveal Approach:
The person also needs to open this with same password which we had given for
encoding. As the other person enters the password, he will be able to see the
concealed content of the file by clicking on extract files.
As the other person enters
the password, he will be able to see the concealed content of the file by
clicking on extract files and the doc file is extracted successfully.
So, by this tool we have
successfully concealed our doc file behind the mp3 file.
Image based steganography
Let’s now hide some text
file behind an image file. So, we have installed next tool which is OpenStego.
Conceal Approach: we will first select the doc file which we
want to hide after that we will add the image file behind which we will conceal
the doc file and then we will choose a password and the concealed file is
created.
Reveal Approach: Now
we will extract the doc file by adding the image and then giving the right
password and we have extracted the doc file.
Video based Steganography
Now let’s see how we can
hide anything behind a Video file. For this we will install the tool Our secret
from the link given here.
Once
it is downloaded successfully. We will now be trying to conceal a doc file
behind a video file.
Let’s
start.
Hide:
So first we will select a video which went to
send. So, by clicking on select a carrier file we will choose our
video and then that file which we want to hide and then giving it a
password and click on hide and our new file is created.
Unhide: Now we will try to open this file with the same tool for unhiding and
it will ask for the password. Once you will enter the password, we will get the
concealed file here.
Text based
Steganography
Now
we are moving towards a new idea of steganography which is white space
steganography. In this kind of steganography, we will hide text behind the text
which will be not possible for anyone to judge. For this we will visit a
website
Conceal
Approach: Here we will click on encode and add
the text which you want to hide and click on encode.
As
you clicked on encode you will see that a new text encoded file is
created.
Reveal
Approach: To decode this encoded text, we will copy
this text and paste it in the box given and click on decode.
And
finally, you will get the message which was hidden behind that.
Another
Method
Conceal
Approach: That’s not all! We can also send this
message as a excel file which is hard to detect for anyone. To use this
feature, we will click on “encode as a spreadsheet” and enter the text
which you want to conceal and click on encode.
Then this generate a new excel file to conceal our
“secret message” behind its record.
When we open this excel file it seems a very normal
excel file by which no one will get to know the real message behind that.
Reveal: But as we know that there is a hidden file behind this so we will
decode this. So first click on decode fake spreadsheet.
Now paste the sheet which we want to decode in the column and click on decode.
Now
you will get the real hidden message which was there behind this excel file as
we got successfully.
So, it’s very clear that
there are several ways of sending safe secret messages by the art of
steganography.
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