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How to Encrypt a Picture With Secret Text

There is an old trick to hide a file or text in an Image an send it over Internet to avoid detection. If we search in Google with the keyword "Hide message in an Image", we can see a lot of tools to hide secret phrases in an image. However, this tutorial doesn't explain the usage of any of the tools. Here we learn how to encrypt a picture with secret text without possible detection. We need a high quality picture in JPG format and once we encrypt this picture with hidden content, you will notice no difference to it. This tutorial is written in a way to teach you this trick without the help of third party tools using a practical example.

Steps to hide Text in an Image

Before proceeding to the trick, we must make sure we have following essential things ready.

  • A quality JPG image

  • Text file you need to hide

  • WinRar


Here I assume the text file we need to hide is named as text.txt and the photo is named as image.jpg. I have a file named hidenfile.rar which is the compressed file of text.txt using WinRar. Winrar is a freeware and you can download it for free from the link below.
http://www.win-rar.com/download.html?&L=0

Now let us check how to perform this task. Go through the step by step instructions provided below.

  1. Create a folder

    I have created a folder named encrypt in C drive and saved the photo and text file there ( C:\encrypt).

  2. Open Command Prompt

    Type cmd on search or run and press enter to open DOS prompt. Now go to C:\encrypt and if you do not know how to go to a particular folder (C:\encrypt) in command prompt, follow the steps below.

    • Type cd\ and press enter, now you will go to C:\

    • Type cd encrypt and press enter

    Now DOS window will be showing the following address C:\encrypt

  3. Now type following code on DOS Prompt

    copy /b image.jpg + hidenfile.rar newimage.jpg

    Here newimage.jpg is the picture which contains the compressed file hidenfile.rar and you can send it your friend. He can open this file using winrar and extract the hidden message from the picture.

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