Hide a file behind Image without Any Software
This was posted by me on 26 Feb 2010. Re-posting it as requested by readers of this blog:
To hide data in an image you need winRAR. First you add file into a rar archive as Secret.rar.
Now copy secret.rar file to a new folder.
Now copy any image u want and paste it in folder of rar file as anyname.jpg. (You can use any other picture file type like .gif, .png etc)
Now open MS-DOS, go to the folder that contains secret.rar file and the image file and type
"copy/b anyname.jpg...