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?man(ual) page.
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.
