About site: Security/Products and Tools/Cryptography/Steganography - OutGuess
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  About site: http://www.outguess.org/

Title: Security/Products and Tools/Cryptography/Steganography - OutGuess Freeware steganographic tools for hiding and detecting hidden data in PNM and JPEG image formats.
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OutGuess - universal Steganography                                              (c) 1999-2004 by Niels ProvosOutGuess Resources  Main Download Information DetectionRelated Information  Links Blog: misc security topics Articles Press Information Support  Send me books Leave a tip with PayPal - it's fast, free and secure OutGuess.org OutGuess 0.2 2001-10-02 - Niels Provos <provos@citi.umich.edu> Support my hacking with thePayPal Tipjar. News  2004-09-06    Improved version of stegdetect released.Stegdetect now supports linear discriminant analysis to detect any JPEG basedstego system. It also features improved detection of F5. 2002-09-25    Fridrich, Goljan and Hogea's "Attacking the OutGuess" is capable of reliably detectingimages with content embedded by OutGuess. 2002-01-26    Improved version of stegdetect released.Stegdetect now detects data at the end of JPEG files hidden with toolslike appendX or camouflage. 2001-12-21    No hidden messages found in USENET analysis. 2001-12-20    Improved version of stegdetect released.Accuracy for jsteg and jphide detection improved. Stegbreak nowuses the file magic utility to improve dictionary attack on outguess 0.13b. 2001-10-12    Steganography Trophy: First Steganographic Image found in the Wild.Stegdetect and stegbreak were successful infinding and retrieving a hidden message from an image. 2001-08-31    Higher-level statistical tests detect OutGuess 0.2. 2001-04-14    Initial release of stegdetect. It detectshidden content in JPG images.Currently detectable schemes are: jsteg, jphide and outguess 0.13b. What is OutGuess OutGuessis a universal steganographic tool that allows the insertionof hidden information into the redundant bits of data sources. Thenature of the data source is irrelevant to the core of OutGuess. Theprogram relies on data specific handlers that will extract redundantbits and write them back after modification. In this version the PNMand JPEG image formats are supported. In the next paragraphs, imageswill be used as concrete example of data objects, though OutGuess canuse any kind of data, as long as a handler is provided. How to get OutGuess You can download OutGuess as UNIX sourcetar ball. OutGuess is available under a BSD software license. Itis completely free for any use including commercial.Please see each source file for its respective license. OutGuess wasdeveloped in Germany. What is Steganography Steganography is the art and science of hiding that communication ishappening. Classical steganography systems depend on keeping theencoding system secret, but modern steganography is detectable onlyif secret information is known, e.g. a secret key. Because of theirinvasive nature, steganography systems leave detectable traces within amedium's characteristics. This allows an eavesdropper to detect mediathat has been modified, revealing that secret communication is takingplace. Although the secrecy of the information is not degraded, itshidden nature is revealed, defeating the main purpose ofSteganography. What does OutGuess do differently For JPEG images, OutGuess preserves statistics based on frequencycounts. As a result, statistical tests based on frequency counts areunable to detect thepresence of steganographic content. Before embedding data into animage, OutGuess can determine the maximum message size that can behidden while still being able to maintain statistics based onfrequency counts. This approach has been described in Defending Against Statistical Steganalysis Niels Provos, 10th USENIX Security Symposium. Washington, DC, August 2001. OutGuess uses a generic iterator object to select which bits in thedata should be modified. A seed can be used to modify the behaviorof the iterator. It is embedded in the data along with the rest of themessage. By altering the seed, OutGuess tries to find a sequence ofbits that minimizes the number of changes in the data that have to bemade.Last modified: July 12 2008 02:56:57 AMCopyright 1999-2008 by Niels Provos
 

Freeware

steganographic

tools

for

hiding

and

detecting

hidden

data

in

PNM

and

JPEG

image

formats.

http://www.outguess.org/

OutGuess 2008 September

dvd rental

dvd


Freeware steganographic tools for hiding and detecting hidden data in PNM and JPEG image formats.

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