Cryptography Reference
In-Depth Information
of enhancements designed to avoid steganalytic techniques
discovered by the creator, Andreas Westfeld. [Wes01, WP99]
http://www.mcdonald.org.uk/StegFS/
This is the source for the Ste-
ganographic File System described in Section 4.5. This soft-
ware works well with Linux file systems and can probably be ex-
tended to any other file systems with some work. It is released
under the GNU GPL.
http://www.smalleranimals.com/stash.htm
The StashIt software hi-
des data in the least significant bits of images with five different
techniques. There is no charge for it.
http://www.darkside.com.au/snow/
The Snow software, developed
by Matthew Kwan, will insert extra spaces at the end of each
line. Three bits are encoded in each line by adding between 0
and 7 spaces that are ignored bymost display programs, includ-
ing web browsers.
http://www.infonex.com/ mark/pgp/m-readme.html
The Mandel-
Steg software hides information in the least significant bit of an
image of theMandelbrot set. The set can be synthesized for any
set of coordinates in the plane with seven bits of accuracy. The
last bit is the message.
http://www.stella-steganography.de/
The Stella (Steganography Ex-
ploration Lab) software is both a tool for hiding information in
bitmaps and a lab for exploring how hidden the information
may be. The software includes a number of different tools for
taking apart the images to see the effects.
http://www.darkside.com.au/gifshuffle/
The Gifshuffle program
written by Matthew Kwan hides information in the ordering of
the palette of an image.
If there are
n
! different ways to ar-
range
objects, then log
2
(
n
!) bits can be hidden in the choice of
which sorting to choose. GifShuffle hides 209 bytes in the way
that it selects 256 colors.
n
http://glu.freeservers.com/sgpo.htm
DavidGlaude andDidier Bar-
zin created this program (SteganoGifPaletteOrder) that hides
information in the permutation of the colors in the GIF palette
in the same manner as GifShuffle.
http://www.spammimic.com
DavidMcKellar created one grammar
that encodes message in spam-like phrases removed from his
collection of spam messages. It is based on the algorithms de-
scribed in Chapter 7.
