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https://github.com/607011/steghide

steghide
https://github.com/607011/steghide

linux macos steganography stego windows

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steghide

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README 

        
Introduction :

==============



Steghide is a steganography program that is able to hide data in various kinds

of image- and audio-files. The color- respectivly sample-frequencies are not

changed thus making the embedding resistant against first-order statistical

tests.



The current version of steghide is 0.5.1



Features:

*) compression of embedded data

*) encryption of embedded data

*) embedding of a checksum to verify the integrity of the extraced data

*) support for JPEG, BMP, WAV and AU files



Steganography :

===============



Steganography literally means covered writing. Its goal is to hide the fact

that communication is taking place. This is often achieved by using a (rather

large) cover file and embedding the (rather short) secret message into this

file. The result is a innocuous looking file (the stego file) that contains

the secret message.



Compilation and Installation :

==============================



Dependencies :

--------------

You should have the following libraries installed to use steghide.



* libmhash

  A library that provides various hash algorithms and cryptographic key

  generation algorithms. Steghide needs this library to convert a passphrase

  into a form that can be used as input for cryptographic and steganographic

  algorithms.

  Available at: http://mhash.sourceforge.net/



* libmcrypt  

  A library that provides a lot of symmetric encryption algorithms. If you

  compile steghide without libmcrypt you will not be able to use steghide to

  encrypt data before embedding nor to extract encrypted data (even if you know

  the correct passphrase).

  Available at: http://mcrypt.sourceforge.net/



* libjpeg

  A library implementing jpeg image compression. Without this library you will

  not be able to embed data in jpeg files nor to extract data from jpeg files.

  Available at: http://www.ijg.org/



* zlib

  A lossless data compression library. If you compile steghide without having

  this library installed you will not be able to use steghide to compress data

  before embedding nor to extract compressed data from a stego-file.

  Available at: http://www.gzip.org/zlib/



Libmhash is absolutely required to compile steghide. While you can compile it

without the other libraries they are highly recommended as major functionality

will not be available without them.



Linux / Unix :

--------------

After unpacking the source distribution, enter the following commands:



1) ./configure 

2) make

3) make check

4) make install (as root)



For more information see the generic installation instructions in the file

INSTALL that came with the distribution.



If any of these commands fails, please send a mail to the steghide development

mailing list ([email protected]) describing the error.

 

Windows :

---------

The easiest way is to download the precompiled binary (including Windows

versions of the necessary libraries) from the steghide website at:

http://steghide.sourceforge.net/index.php



If you want to compile the sources yourself you need a C++ compiler. How you

need to compile the source code depends on the compiler you are using: Please

consult your compiler's documentation.



Steghide can be compiled with gcc in the cygwin environment

(http://www.cygwin.com/) which is a unix emulation layer for Windows using the

procedure mentioned above for the Linux/Unix compilation.



Quick-Start :

=============



Here are some examples of how steghide can be used. Take a look at these to get

a first impression. If you want more detailed information please read the

manpage.



The basic usage is as follows:



  $ steghide embed -cf picture.jpg -ef secret.txt

  Enter passphrase:

  Re-Enter passphrase:

  embedding "secret.txt" in "picture.jpg"... done



This command will embed the file secret.txt in the cover file picture.jpg.



After you have embedded your secret data as shown above you can send the file

picture.jpg to the person who should receive the secret message. The receiver

has to use steghide in the following way:



  $ steghide extract -sf picture.jpg

  Enter passphrase:

  wrote extracted data to "secret.txt".



If the supplied passphrase is correct, the contents of the original file

secret.txt will be extracted from the stego file picture.jpg and saved

in the current directory.



If you have received a file that contains embedded data and you want to get

some information about it before extracting it, use the info command:



  $ steghide info received_file.wav

  "received_file.wav":

    format: wave audio, PCM encoding

    capacity: 3.5 KB

  Try to get information about embedded data ? (y/n) y

  Enter passphrase:

    embedded file "secret.txt":

      size: 1.6 KB

      encrypted: rijndael-128, cbc

      compressed: yes



After printing some general information about the stego file (format, capacity) you will be

asked if steghide should try to get information about the embedded data. If you answer with

yes you have to supply a passphrase. Steghide will then try to extract the embedded data

with that passphrase and - if it succeeds - print some information about it.



Contact :

=========



Website :

---------

You can get the latest version of steghide as well as some additional

information and documentation from the steghide website at:

http://steghide.sourceforge.net/



Mailing Lists :

---------------

If you have found a bug or if you have questions, comments, suggestions, etc.

please send a mail to the development mailing list:

[email protected]

To receive mails sent to this list, subscribe to it at:

http://lists.sourceforge.net/lists/listinfo/steghide-devel



If you want to be informed, when a new version of steghide is released please

subscribe to the steghide announcement mailing list at:

http://lists.sourceforge.net/lists/listinfo/steghide-announce



Anonymous CVS access :

----------------------



You can access the most recent development source code via anonymous cvs. Just

type the following lines:



$ cvs -d:pserver:[email protected]:/cvsroot/steghide login

CVS password:  [ Hit RETURN here ]



$ cvs -z3 -d:pserver:[email protected]:/cvsroot/steghide co steghide



You can also browse the cvs repository on the web:

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/steghide/



Author :

--------

You can contact me (Stefan Hetzl) via e-mail: [email protected]