Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. The word steganography is of Greek origin and means “concealed writing” from the Greek words steganos (στεγανός) meaning “covered or protected”, and graphein (γράφειν) meaning “to write”.
Steganography tools:
- Linux: steghide http://steghide.sourceforge.net/
- Mac Osx: iSteg http://www.hanynet.com/isteg/index.html
- Windows: mypapit a.k.a 9w2wtf TinySorok http://sourceforge.net/projects/ppsplit/files/Small%20Utility/TinySorok/TinySorok-0.05-bin.zip/download