Questions tagged [steganography]

Find hidden data in various media forms.

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8
votes
2answers
2k views

The mystery of the anonymous email

It is a bright Sunday afternoon. You are on a holiday, enjoying your cappuccino. Suddenly, you get a call from your boss at NSA. He tells you that a psycho-hacker has sent him and the whole staff a ...
8
votes
2answers
606 views

John's first pixel drawing

Story continuation based from this first riddle and this other riddle. Bob was enjoying his day off at home when he received a message from John. John sent him a picture of a piece of art, the first ...
8
votes
3answers
1k views

Another visual puzzle

Hmmz, it seems that I need to add 30 characters here, even though an image says more than a thousand words... When you think you have solved it, please read this hint:
4
votes
1answer
528 views

Steganography. What is the decryption?

We were given an image that could be a barcode found hidden in it. However, I'm unable to read the barcode using an app after I re-created it and I'm unsure if I made an error or if it's an actual ...
6
votes
2answers
1k views

Find the secret word in this encrypted image (part 1)

There is a secret word associated with this image that will be clear if it is decrypted properly. What is that word? Full size image: http://i.imgur.com/XMdDfAM.jpg
22
votes
3answers
2k views

Down the Rabbit Hole

There's a secret hidden in the text below. What mind-blowing truth does it reveal? Not imaginative? Then Zeke's Clues may assist! Unsure, lad? With our patented Obscurity Clues, begin verifiably ...
8
votes
1answer
834 views

Why am I screaming?

Simply find what is hidden in this picture.
16
votes
6answers
2k views

Five puzzles in one!

This is an experiment of nested puzzles. The answer of each puzzle is necessary to solve the next one. Sometimes you have to manipulate it, sometimes you have to open your eyes (and mind). Run, to ...
9
votes
1answer
322 views

The Serpent Stronghold

You come to the door of the stronghold. You recall what the scriptures say: You must speak the right words, and the door will open. But what words? It doesn't say. You have a look at the door in front ...
14
votes
2answers
3k views

What's special about this image?

There's something very special hidden in this image. You will definitely know when you find it. (I know Stack Exchange lossily compresses images but I've checked and no pixels have been altered.) ...
19
votes
2answers
2k views

A challenging visual puzzle

Here's a puzzle that I created. The end result is a number.
159
votes
1answer
8k views

Chaos and Order: a visual puzzle in stained glass

I created a visual puzzle, which my wife then implemented as part of a stained-glass window. I've no idea if it is (a) obvious, (b) stupid or hopefully (c) extremely clever, and hence would love to ...
25
votes
2answers
2k views

Invisible Ink (for steganographic use): How to hide an 'invisible' message within Internet content

This simple puzzle demonstrates how you can use invisible ink to hide text in online puzzles. Your task is simply to decode the text hidden in the quoted line below: Happy​​​​‍​‌‍​‌‌​‍​‌‌​‍‌​‌‌‍​​...
35
votes
1answer
3k views

Lolcat Steganography: Find the message hidden within the transport medium of humorous feline photography

The Bad Guys (curse them!) have begun communicating in lolcats, to enable their Internet communications to take place unnoticed. This is a job for the NSA/GCHQ crack team of cryptanalysts. ...

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