NewsForge: Open Source Hides Secret Data

“The art of hiding information from anyone except from the
intended receiver has been used for many centuries. Hiding
information by embedding it in other, seemingly innocuous
information is known as steganography, a word that means ‘covered
writing’ in Greek. Today, steganography applications can hide one
file within another on a computer. Steganography applications are
available on many different platforms, including Windows, Linux,
and *BSD.

“You need two files in order to use steganography. The first one
is the innocent-looking file, called the ‘cover file.’ A cover file
can be in many graphical or audio file formats, such as .bmp,
.jpeg, and .wav…”

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