cedric's bazaar

User Tools

Site Tools

Trace:
security:steganography

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Next revisionBoth sides next revision
security:steganography [2011/12/29 10:06] – cedricsecurity:steganography [2012/09/15 16:47] – [Installation of Stéganô] cedric
Line 8: Line 8:
 sudo python setup.py install sudo python setup.py install
 </code> </code>
 +
 +You can read the [[http://stegano.readthedocs.org/ | documentation of Stéganô]] (included in the sources).
 +
 ====== Steganography ====== ====== Steganography ======
 Steganography is the art and science of writing hidden messages. Steganography is the art and science of writing hidden messages.
Line 149: Line 152:
  
 <code bash> <code bash>
 +$ cd stegano
 +
 # LSB with The Eratosthenes set # LSB with The Eratosthenes set
-$ slsb-set --hide -i ../examples/pictures/Montenach.png -o ./Montenach-enc-gen.png --generator eratosthenes -f ../examples/lorem_ipsum.txt+$ slsb-set --hide -i ./examples/pictures/Montenach.png -o ~/Montenach-enc-gen.png --generator eratosthenes -f ./examples/lorem_ipsum.txt
  
 # LSB only # LSB only
-$ slsb --hide -i ../examples/pictures/Montenach.png -o ./Montenach-enc.png  -f ../examples/lorem_ipsum.txt+$ slsb --hide -i ./examples/pictures/Montenach.png -o ~/Montenach-enc.png  -f ../examples/lorem_ipsum.txt
 </code> </code>
  
Line 161: Line 166:
 <code bash> <code bash>
 # Steganalysis of the original image # Steganalysis of the original image
-$ steganalysis-parity -i ../examples/pictures/Montenach.png -o ./Montenach-steg.png +$ steganalysis-parity -i ../examples/pictures/Montenach.png -o ~/Montenach-steg.png 
  
 # Steganalysis of the image with hidden text (LSB only) # Steganalysis of the image with hidden text (LSB only)
-$ steganalysis-parity -i ./Montenach-enc.png -o ./Montenach-enc-steg.png +$ steganalysis-parity -i ~/Montenach-enc.png -o ~/Montenach-enc-steg.png 
  
 # Steganalysis of the image with hidden text (LSB + Eratosthenes) # Steganalysis of the image with hidden text (LSB + Eratosthenes)
-$ steganalysis-parity -i ./Montenach-enc-gen.png -o ./Montenach-enc-gen-steg.png +$ steganalysis-parity -i ~/Montenach-enc-gen.png -o ~/Montenach-enc-gen-steg.png 
 </code> </code>
  
Line 186: Line 191:
 ==== Reveal the message ==== ==== Reveal the message ====
 <code bash> <code bash>
-$ slsb-set --reveal --generator eratosthenes -i ./Montenach-enc-gen.png -b file-gen.txt +$ slsb-set --reveal --generator eratosthenes -i ~/Montenach-enc-gen.png -b ~/file-gen.txt 
-$ slsb --reveal  -i ./Montenach-enc.png -b file.txt +$ slsb --reveal  -i ~/Montenach-enc.png -b ~/file.txt 
-$ cmp file-gen.txt file.txt  +$ cmp ~/file-gen.txt ~/file.txt  
-$ cat file.txt +$ cat ~/file.txt 
 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam placerat fermentum Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam placerat fermentum
 lorem, at porttitor metus congue eu. Mauris vitae tell lorem, at porttitor metus congue eu. Mauris vitae tell
Line 195: Line 200:
 . .
 . .
-$ python ./slsb-gen.py --reveal --generator fermat -i ./Montenach-enc-gen.png -b file.txt+$ slsb-set --reveal --generator fermat -i ~/Montenach-enc-gen.png -b ~/file.txt 
 +Impossible to detect message. 
 + 
 +$ slsb-set --reveal --generator mersenne -i ~/Montenach-enc-gen.png -b ~/file.txt
 Impossible to detect message. Impossible to detect message.
 </code> </code>
security/steganography.txt · Last modified: 2021/06/27 00:36 by cedric