DEFCON Raitlin's Challenge

Raitlin's Challenge is an annual puzzle contest held at the hacker and cybersecurity convention. It is organized by the Illuminati Party, and is named for Raitlin (Rick Davis). It was first held in DEFCON 24, 2016. Puzzles are released all at once and generally consist of a single image, with ciphers and encodings being a particular mainstay. Additionally, the length of the answer is provided (though this includes spaces).