Rhythmic Cipher

Challenge description:

A secret group has been exchanging messages using an unusual method—hiding words in plain sight through an old cipher. Their latest transmission has been intercepted.

Can you decode their message and uncover what they are trying to say?

Flag Format: VishwaCTF{word1_word2}

So here we are given two tiny little GIFs, so lets take a look at them!

Immediately when given a GIF my first though is to extract each frame from it, so I can see it better. It doesn’t matter what you use, just don’t be clinking on random links. The extracted images of interest are as follows:

gif1.gif

gif2.gif

Elementary My Dear Watson!

I’ve seen this before, this looks like the Dancing Man cipher, which first debuted in Sir Arthur Conan Doyle’s “The Adventure of the Dancing Men”. It is a simple substitution cipher that has a different position of the characters arms and legs for different letters and numbers, the key is as follows:

Going back through each frame, we’ll end up with CIPHERED and DANCE, which makes our flag!

FLAG: VishwaCTF{CIPHERED_DANCE}