9. The secret digital society Cicada 3301

Cicada 3301 is one of the biggest mysteries of the digital world. They publish games and complicated puzzles to find best coders. The puzzles and games are long and elaborate. The first one started in 2012 and took a month to be cracked. What’s astonishing is that Cicada 3301 have posted clues internationally in many countries.

PHOTO: Wikipedia

The “secret society” says it is testing, analyzing and will ultimately recruit best coders in the world for a purpose no-one knows. One of the theories suggest that Cicada 3301 is not an evil or secretive society, they are probably owned by tech giants like Google or Facebook and their purpose is to perfect cryptography and privacy.

PHOTO: Surian Soosay/Flickr