steghide: add page (#3950)

pages/linux/steghide.md

@@ -0,0 +1,28 @@
+# steghide
+
+> Steganography tool for JPEG, BMP, WAV and AU file formats.
+> More information: <https://github.com/StefanoDeVuono/steghide>.
+
+- Embed data in a PNG image, prompting for a passphrase:
+
+`steghide embed --coverfile {{path/to/image.png}} --embedfile {{path/to/data.txt}}`
+
+- Extract data from a WAV audio file:
+
+`steghide extract --stegofile {{path/to/sound.wav}}`
+
+- Display file information, trying to detect an embedded file:
+
+`steghide info {{path/to/file.jpg}}`
+
+- Embed data in a JPEG image, using maximum compression:
+
+`steghide embed --coverfile {{path/to/image.jpg}} --embedfile {{path/to/data.txt}} --compress {{9}}`
+
+- Get the list of supported encryption algorithms and modes:
+
+`steghide encinfo`
+
+- Embed encrypted data in a JPEG image, e.g. with Blowfish in CBC mode:
+
+`steghide embed --coverfile {{path/to/image.jpg}} --embedfile {{path/to/data.txt}} --encryption {{blowfish|...}} {{cbc|...}}`