Hide a file within an image without using third party software

• Compress the file(s), you want to hide, using winrar, say, file.rar
• Let the image to which we want to hide img.rar be pic.jpg
• Copy pic.jpg and file.rar to same folder(let it be in D:\hide)
• Open command prompt and change the directory to hide (ie. change from C drive to D and go to directory hide). You can done it by using following DOS commands

1. Use the command  'CD..'  to go back to parent directory. Use this command until you reach C:\> .    
2. Type  'D:'   in C prompt, that is C:\>D: and press enter.
3. You are now in D prompt.
4. Use CD<folder name> command to go to the folder in which you have the image and rar file (here file.rar and pic.jpg ). Here we type 'cd hide'  in  D:\> we will be in the folder named hide and you can see the prompt like D:\hide>

• Then type   'copy /b pic.jpg+file.rar sec.jpg'  after D:\hide>
• We now have an image file named   sec.jpg   in D:\hide>
• If we open the image file sec.jpg you can see only  img.jpg opened.
• To get the pictures back just open the  file  sec.jpg  using Winrar.