Elias Thil & Jari Kemi
The subject of this essay is about a variety of ways to hide information within a message, sent between two specific parties, from any eavesdropper for whom the message was not indented. This hiding of information is called Steganography. There is an introduction regarding the subject involving famous examples of hiding messages where one of them involves the printing of messages under the skin over areas that are normally covered with hair. When this area later is shaved the message is revealed. This is one of the oldest ways of known use of the principles of steganography. The section with historical examples is followed by more specific information regarding the application of stenganography, mainly considering aspects of the present day and in association with the technology that exists. Special attention is given to the aspects of transferring hidden messages over the Internet, where the messenger can be represented by a picture or just a chunk of normal text. The computers come to play a role in the creation and decryption of these steganograms. A discussions follows involving the increasing power in today's computers and if it might be possible to create a steganogram that can only be discovered by a human and not a computer, explaining what parameters that might be associated with these differences.