Wednesday 4 July 2012

Steganography-How to hide a data behind a picture ??

A really shocking news for me , when i heard that Terrorists in the attack of 9/11 used "STEGANOGRAPY" for communication , scanners in the World Trade Center couldn't identify this method before the attack , but it was discovered in the post investigation of the attack.
                                                                                                                     

                I intentionally have no wrong purpose while writing the post , i am writing this only for educational purpose , if some people can use this type of tricks for a big threat to societies , then why can't we use these methods to prevent ourselves or to protect the society ?? This question always arise in my mind   ,
we have to discover something new to give a strong slap to these people .

               So now i should move to the main technical stuff.
Steganography is art and science of hiding facts behind a false or useless but interesting element. In this process no one other than the sender and the and the recipient can view this. Cryptography is combined with steganography just for the reason that, if also the message is discovered it cannot be read. The main difference lies in the existence of cryptography and steganography

In Cryptography one can know that a message is encrypted. But in Steganography one cannot know or observe about it simply because its hidden behind an image, video or an audio etc… which without keen observation might go without any suspicion. 
Following is the trick how to use it.
  •  Open Command Prompt or Go to Start > Run, type cmd. 
  • Now type copy /B original.jpg + archive.rar new.jpg 

              In the above command Original.jpg is any image in which we are going to embed archive.rar file.



                           
             original.jpg                                                                     new.jpg
  • If you open new.jpg with some picture viewer it will be a normal image, but when you open it with WinRAR for example it`ll show you the contents of archive.rar. It will also work with different types of files.
                                                                     "THNXX  A LOT"
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