Steganography: The Art of Hiding Information in Plain Sight

Steganography in the Greek language means covered writing. In today's terminology, it is the art of communicating in a hidden way. It is referred to as transmission security in military literature. Its goal is to hide messages inside other harmless messages in such a way that an enemy would not event know a second secret message is present. This is different from cryptography where it is anticipated that the enemy might detect, intercept and modify messages. However, in doing so, the enemy still cannot violate certain security premises guaranteed by a cryptosystem.