Hide Secret File Inside an Image – Steganography

Type : Tips and Trick

Level : Easy

Worked on : Windows XP, Windows Vista. Windows 7

Finally after long time hibernating because I’m dealing with my thesis defense, now I will try to write an easy and simple + light tips and trick. Maybe for some of you already know this trick, but nevertheless it still useful as an information :-).

Some people emailing me and told me to keep posting the tutorials, and I just said SURE of course…that’s mean I still need much better time management to handle my life, work and computer matter 🙂 .

Wikipedia says about Steganography :

Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. The word steganography is of Greek origin and means "concealed writing" from the Greek words steganos (στεγανός) meaning "covered or protected", and graphei (γραφή) meaning "writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography disguised as a book on magic. Generally, messages will appear to be something else: images, articles, shopping lists, or some other covertext and, classically, the hidden message may be in invisible ink between the visible lines of a private letter.

Okay, now lets start the tips and trick about How to Hide File Inside an Image.

Requirements :

1. Command Prompt

Step by Step :

Before begin, I have one secret file named : workers-salary.pdf, I do not want other people know about this file and also a picture named : apple.jpg. All of that files I put on my personal folder named pictures.

1. Open your command prompt  (view the shortcut here)

2. Go to your pictures folder (see the tutorial how to navigate using command prompt here)

3. Compress your secret file (workers-salary.pdf) using WinRar,  7Zip, etc.

Now in your picture folder you already have new file named : workers-salary.rar.

4. Next step we will use the command prompt to join this two file.

copy /b [the_image] + [rar_file_to_hide] [image_result_name]


e.g : copy /b apple.jpg + workers-salary.rar v4l.jpg

Yes that’s it 🙂

5. Oops I’m forgot to describe how to view the content. Actually there’s two steps you can do to view the content.

a. change the file extension from v4l.jpg to v4l.rar and just open using your WinRar application and your file is there.

b. right click v4l.jpg and choose open with WinRar and your secret file is there.

Hope its useful 🙂

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