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Steganography

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Title: Steganography


1
Steganography
  • Steganography is the art and science of writing
    hidden messages in such a way that no one apart
    from the sender and intended recipient even
    realizes there is a hidden message (Wikipedia,
    the free encyclopedia)
  • Like encryption, steganography involves the
    securing of information through the manipulation
    of data 1
  • By contrast, cryptography obscures the meaning of
    a message, but it does not conceal the fact that
    there is a message (Wikipedia). Steganography is
    designed to hide the data from the view 1
  • Steganography is the science of hiding
    information. Whereas the goal of cryptography is
    to make data unreadable by a third party, the
    goal of steganography is to hide the data from a
    third party (Garry C. Kessler) 2

2
History
  • The word steganography is of Greek origin and
    means "covered, or hidden writing".
  • The term steganography was introduced at the end
    of the 15th century
  • The use of steganography dates back several
    millennia.
  • In ancient times, messages were hidden on the
    back of wax writing tables, written on the
    stomachs of rabbits, or tattooed on the bald head
    of soldiers

3
Steganographic Message
  • Steganographic Message has three parts
  • container or carrier the file which conceals
    data
  • hidden message the actual data
  • steganography key could be the hidden message
    was also encrypted, or the key was used for the
    steganography method

4
References
  • 1. Marjie T. Britz, Computer Forensics and Cyber
    Crime, An Introduction
  • 2. http//www.garykessler.net/library/steganograph
    y.html
  • 3. http//en.wikipedia.org/wiki/Steganography
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