CTF Qual 2008 Tutorials
Task: Find the hidden message in the image below:
The transparent part of the image contains a
lot of random-looking colors.
To see them, open the image in Paint.
Get the Red, Green, Blue values of the pixels
and analyze the numbers. They are not random.
A lot of the pixels have the same value of one color--focus on them.
Take those pixels and find the other color that has values from 1 to 26.
Translate the numbers 1 to 26 to letters A-Z
Apply a Caesar Cipher to the letters, moving them forward in the alphabet.
Capture the Flag Solutions