![]() Parallel Worlds is a company based in Kiev, capital of Ukraine. Contraband, Contraband 9g by Julius B.Ĭontraband Hell Edition (CHE) by Julius B.Last known contact information for the author: Frédéric Péters, rue Chantraine, 38 4420 Montegnée Belgique e-mail : IMAGES: (TGA (24-bit uncompressed, 640x480, minimum of 921618 bytes).īMPTable v2.16 (DEMO) Data Embed by Brook Sandford and Ted Handel () Brook Sandford Ted Handel IMAGES: (BMP ).BMPEmbed v1.54 (DEMO) Data Embed by Brook Sandford and Ted Handel () IMAGES: (BMP ).Other questions: Visit Parallel Worlds page at Visit our steganography page at Visit BMP Secrets page at. Covert.tcp C source code for Covert Channels in the TCP/IP Protocol Suite by Craig H.Last known address: runs on Win32 systems and embeds in IMAGES: (BMP (24-bit - will convert lower resolutions to 24-bit) ) Last known urls: or CHE runs on Win9x and process 24-bit BMP images Thyssen & Hens Zimmerman of Immortalware / JTHZ Productions based in Amsterdam, The Netherlands. ![]() dc-Steganograph The application is also known as: DC-Stego and DiSi-Steganograph.Data Stash v1.1, v1.1a Lim, Chooi Guan Previous addresses: Claims to embed in the following media: IMAGES: (any binary ) AUDIO: (any binary ) TEXT: (yes, but suggest avoiding ) FILE/DISK: (any binary ) OTHER: (any binary ).The article and source code are available from Published in f¡®sT - (First Monday), Vol.2 No.5. Digital Picture Envelope by the Digital Picture Enveloping Research Group.DCT-Steg (aka DCT-Jpeg) by Stefan Katzenbeisser embeds in JPEG images by manipulating the DCT coefficients.A DOS program that hides data in 320x200 256 color PCX-files. In November 2018, Debian developer Joao Eriberto Mota Filho imported the source code into a new repository on GitHub to continue development, and since then released some new minor versions that include bug fixes from several people.Product is based on the BPCS Steganography research. After its last version 1.3 from September 28, 2015, it was also abandoned and in 2018 its website went offline. OutGuess was abandoned and the official website was shut down in September 2015.Ī fork called OutGuess Rebirth ( OGR) was released in 2013 by Laurent Perch, with some bug fixes and a graphical user interface for Windows. It gained popularity after being used in the first puzzle published by Cicada 3301 in 2012. It was broken by an attack published in 2002 that uses statistics based on discontinuities across the JPEG block boundaries (blockiness) of the decoded image and can estimate the lengths of messages embedded by OutGuess. He released it in February 2001 in OutGuess version 0.2, which is not backward compatible to older versions. In response, Provos implemented a method that exactly preserves the DCT histogram on which this attack is based. In 1999, Andreas Westfeld published the statistical chi-square attack, which can detect common methods for steganographically hiding messages in LSBs of quantized JPEG coefficients. OutGuess was originally developed in Germany in 1999 by Niels Provos. This technique is criticized because it actually facilitates detection by further disturbing other statistics.Īlso, data embedded in JPEG frequency coefficients has poor robustness and does not withstand JPEG reencoding. Subsequently, corrections are made to the coefficients to make the global histogram of discrete cosine transform (DCT) coefficients match that of the decoy image, counteracting detection by the chi-square attack that is based on the analysis of first-order statistics. OutGuess determines bits in the decoy data that it considers most expendable and then distributes secret bits based on a shared secret in a pseudorandom pattern across these redundant bits, flipping some of them according to the secret data.įor JPEG images, OutGuess recompresses the image to a user-selected quality level and then embeds secret bits into the least significant bits (LSB) of the quantized coefficients while skipping zeros and ones. An algorithm estimates the capacity for hidden data without the distortions of the decoy data becoming apparent.
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