I came across this article today that shows you how to hide a file inside a jpeg image using WinRar. It’s very cool but you can’t use it for top secret stuff as the information is stored in plain text and the large file size of the image looks a bit suspicious. However, if you want to keep something secret this is a good way of doing it.
First of all create your jpeg picture and your text file that you want to hide. I have a picture of Frank Lampard and a text file containing some secrets I never want anybody to see. Create a rar archive containing the files you want to hide.
Screenshot 2 – Marge the filesOpen up the Windows Command Prompt. Navigate to the folder where your files are stored and type:
‘copy /b lampard.jpg + secret.rar football.jpg’ where lampard.jpg is the original picture, secret.rar is the file to be hidden, and football.jpg is the file which contains both.
Open up the newly created jpeg image to see if it displays the original image. Then open it with WinRar and look at the files contained inside. There you have it. Your secret text file is hidden inside an innocent looking jpeg.
Take a look at the original article for more details.