:: Archive of Steganographic Content ::
Skullcode is an obscure website with very little public documentation on it. There
have been a few people who have
tried to crack it but I have no idea if the full
thing has been solved yet.
Tengri137 is fascinating to me. They have used exotic maths (or something) to
create many perfect number cubes as part of their puzzles (there were less than a
dozen previously known). They also release
information that they believe will
advance human society. Lots of stuff about them around the web, very interesting.
Cicada 3301 is a great
steganographic oddity, and
for good reason. Here are the
links to their
twitter,
subreddit(
s), and an
interesting theory about them.
The
Polish Plague Doctor stego disc that circulated around some tech circles.
This is a particularly interesting excersize in steganography because of how many
pieces of data are hidden in a single file, the pieces of which are still being
figured out. Not to mention, it is strongly themed around the black plauge; spooky.
The
Voynich Manuscript was a linguistic oddity. Just recently there was a
breakthrough that showed the text was written in ancient Turkic. It is still one
of the most famous cases of obscured texts. Here is a link to the
full text, as
well as a
transcription of the symbols used.
The
Copiale Cipher was a manuscript from the 1700's for an ocult order and was
completely enciphered. It's a good example of an obfuscated historical text; a full
transcription of which can be found
here.
The
Library of Babel can be used to send messages, as technically everything is
already written in it. There is also a similar function for images called
Babelia
in which all images in the 640x416 dimension range theoretically
already exist.
Stego tools using similar functions are incredibly underutilized.
:: Miscellaneous Resources ::
OpenPuff 4.00 is a robust steganography tool for media-file manipulation.
Online image metadata viewer and
ExifTool download plus
GUI.
CyberChef is an online cipher suite (
sourcecode).
Cryptii and
text tools work too.
Sonic Visualizer and
Spec are audio spectrometers; full-featured DAWs work too.
FLMask is an alternative for the now-defunct
G-Mask image manipulation software.
Unicode steganography is possible by utilizing the blank/null characters in UTF-8.
f5stego.js is a browser plugin for jpeg stego on the fly.
SilentEye is a steg tool for injecting messages into pictures and audio files.
DeepSound lets you inject any data into audio files.
CrypTool is the industry standard for learning and using cryptographic techniques.
Dcode is also a great tool for examining and learning about ciphers.
The
OEIS and
Nonograms are good for steganography using maths, including
audio.
PubChem and
avogadr.io can be used for chemical steganography.
SCIpher uses
SCIgen to hide messages is automatically generated academic papers.
Moxtak, one of our discord members, has made this
short steganography challenge.
What
databending is and how to do it;
photomosh for image/video manipulation.
The
IPA and alternative phonetic arrangements are useful for obfuscating text.
Xenotation is a simple but interesting cipher.
Learning how to crack basic to advanced ciphers is an important and useful skill;
MysteryTwisterC3 hosts many of these kinds of challenges including still-unsolved
historical challanges, some of which have significant prize money attached to them.
There are similarly-styled puzzles hosted on
/r/bitcoinpuzzles which all have prize
money associated with them as well.