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The F5 package for encoding information in JPEG images
using a technique to thwart visual and statistical attacks. |
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Romana Machado distributes the Java version of her
Stego and EzStego software from here. This cross-platform tool hides
information in the least significant bit of an image after the colors
in the image are sorted. This usually works quite well, but there can be some
inconsitencies. The software is distributed with the GNU Public License.
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The F5 software used for hiding information in JPEG images
and includes a number of enhancements designed to avoid steganalytic techniques
discovered by the creator, Andreas Westfeld . |
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The source for the Steganographic File System. This
software works well with Linux file systems and can probably be extended
to any other file systems with some work. It is released under the GNU GPL.
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| Click
here |
The StashIt software hides data in the least significant
bits of images with five different techniques. There is no charge for the
software. |
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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 by most display programs
including web browsers. |
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The MandelSteg software hides information in the least
significant bit of an image of the Mandelbrot 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. |
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The PGP Stealth project turns a PGP message into
something indistinguishable from noise. |
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The Stella (Steganography Exploration 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. |
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here |
The Gifshuffle program written by Matthew Kwan hides
information in the ordering of the pallete of an image. If there are n! different
ways to arrange n objects, then log2(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. |
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David Glaude and Didier Barzin created this program
( SteganoGifPaletteOrder ) that hides information in the permutation of
the colors in the GIF palette in the same manner as GifShuffle . |
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Steganos sells a suite of security products that includes
The Safe , a ``hard drive that disappears at the click of a button. "
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The JSteg software enhanced with a Windows shell.
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The JPHide and JPSeek programs written by Allan
Latham hide information in the JPEG coefficients using classical algorithms.
The software keeps track of the change in the statistical profile of the
coefficients to help you avoid steganalysis. |
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Compris sells TextHide , a software program that hides
information by changing the structure of sentences. That is, sentences are
changed to hide information. The text should, in theory, say the same thing
after the extra information is inserted. |
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Mark Chapman created NiceText as his Master thesis
project during his time at the University of Wisconson studying with George
Davida . The software assembles a dictionary and classifies words to make
it possible to approximate styles while also hiding information in text.
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DataMark Technologies sells four programs using steganography.
One offers watermarking, one embeds raw information, one for adding a digital
signature to an image, and one for building a ``safe''. |
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Stealth Encrypt bundles a steganography wizard with
their security suite. |
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Click here |
Hide4PGP stores data in the least-significant bit of
either BMP or WAV files. It's a small, free program. |
| Click here
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BlindSide hides information in bit mapped images after
using a proprietary encryption algorithm for extra protection. |
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The Steghide software is a GPL protected package started
by Stefan Hetzl for hiding information in the least-significant bits of
images (BMPs) or sound files (WAV or AU). |
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Click here |
Hide In Picture stores information in the least significant
bits of image files. |
| Click
here |
In The Picture hides information in 4-bit, 8-bit and
24-bit images. The software can also store multiple files protected with
different passwords. |
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MixMaster is an excellent set of tools for running
and using anonymous remailers. |
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Professor Deepa Kundur's watermarking links. Her papers can be found here.
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EncryptPic hides information in 24-bit BMP images after
scrambling them with the Cast algorithm. |
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Andrew Brown wrote S-Tools , one of the first programs
for hiding information in image and sound files. |
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Invisible Secrets is a shareware program for storing
information in the usual places. It is a well-designed and highly polished
program. A version supported by banner ads is also available. |
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Click here |
S-Mail hides information in x86 executable files (.exe
or .dll) The programs still work after the information is inserted. |
| Click
here |
Camoflage is a basic tool for compressing, encrypting
and then appending the information to the end of a file. The information
isn't inserted steganographically into the actual data, it's just stuck
at the end. This is often good enough and it is guaranteed not to leave
any distortion to the cover file. |
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wbStego is a polished, professional tool for hiding
information in sound, image and text formats. The latest version can also
store them in Adobe PDF files in order to help establish ownership. |
| Click here
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If you want to hide information in a scrambled directory
on your hard drive, Scramdisk provides the mechanism. |
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Fabien A. P. Petitcolas created MP3Stego for hiding
information in the very popular MP3 files. The mechanism tweaks the parity
of some of the quantized coefficients chosen using a random number generator.
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| Click here |
Niels Provos built the Outguess system to hide information
in JPEG files without distorting the statistical profile. He also distributes
the StegDetect program which will detect distortions in other steganographic
systems. |
| Click
here |
Psionic Software created this package for hiding information
in the redundant or optional bits of the TCP/IP headers . (The IP packet
identification field, the TCP initial sequence number field and the TCP
acknowledged sequence number field.) |
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PGMStealth hides data in the least significant bits
of PGM files on Unix boxes. |
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Piilo hides data in the least significant bits of PGM
files on Unix boxes. |
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The StirMark software helps test watermark or image
steganographic methods by scrambing the images in subtle ways. The software
treats the image like a rubber sheet by stretching some parts, blurring
other parts, destroying some parts, and even duplicating small parts. The
meddling is controlled with parameters so watermark creators can make claims
like, ``This software resists Stirmark at settings up to 1.5." |