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--- security:steganography [2011/12/29 10:08] – [Reveal the message] cedric
+++ security:steganography [2016/07/05 13:01] – cedric
@@ Line 4: / Line 4: @@
 <code bash>
-hg clone http://hg.cedricbonhomme.org/stegano/
+sudo pip install Stegano
-cd stegano/
-sudo python setup.py install
 </code>
+You can read the [[http://stegano.readthedocs.io | documentation of Stéganô]] (included in the sources).
 ====== Steganography ======
 Steganography is the art and science of writing hidden messages.
@@ Line 19: / Line 20: @@
 We will dive into digital steganography.
-The folowing sections will present some techniques of digital steganography.
+The following sections will present some techniques of digital steganography.
 ===== Simple steganography art =====
-In computer scinece a well known method of hiding data (message) is to concatenate these data to an archive.
+In computer science a well known method of hiding data (message) is to concatenate these data to an archive.
 For example, if I want to hide a text file in a music file:
@@ Line 149: / Line 150: @@
 <code bash>
+$ cd stegano
 # 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
-$ 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>
@@ Line 161: / Line 164: @@
 <code bash>
 # 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-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-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>
@@ Line 186: / Line 189: @@
 ==== Reveal the message ====
 <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, at porttitor metus congue eu. Mauris vitae tell
@@ Line 195: / Line 198: @@
 .
 .
-$ slsb-set --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
+$ slsb-set --reveal --generator mersenne -i ~/Montenach-enc-gen.png -b ~/file.txt
 Impossible to detect message.
 </code>