steghide

Table of Content

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.

Wikipedia


Installation

guix package -i steghide

Usage

An interesting way to hide a key, is to use a JPG image to store the key. Here’s how-to do that:

We need a JPG image; I copied one from my Pictures folder to tomb_test:

$ cp ~/Pictures/Some.jpg .
$ ls
secret.tomb  secret.tomb.key  Some.jpg

To embed the key in the JPG (this will prompt you for a passphrase which should be different from the one you used to secure the key):

$ steghide embed -cf Some.jpg -ef secret.tomb.key
Enter passphrase:
Re-Enter passphrase:
embedding "secret.tomb.key" in "Some.jpg"... done

You can now delete your key with:

rm secret.tomb.key

To retrieve the key file:

$ steghide extract -sf Some.jpg
Enter passphrase:
wrote extracted data to "secret.tomb.key".

Bonus: To get determine whether a file has a key:

$ steghide info Some.jpg
"Some.jpg":
  format: jpeg
  capacity: 25.1 KB
Try to get information about embedded data ? (y/n) y
Enter passphrase:
  embedded file "secret.tomb.key":
    size: 859.0 Byte
    encrypted: rijndael-128, cbc
    compressed: yes

See also

PantherX & (unofficial) GNU Guix Wiki.

Last update: 2022-09-21 21:54:22 +0000

Inspired by the excellent Arch Linux Wiki