Cicada 3301
A cryptographic scavenger hunt crossed from image boards into the physical world. The people behind it remain unidentified.
The case
On January 4, 2012, an image signed “3301” appeared online. Its message invited people to uncover hidden information and follow a trail. A participant interviewed by Fast Company described solving clues that used image steganography, ciphers, a telephone message, book codes, and posters placed in multiple cities.
The organizers described the challenge as a search for unusually capable people. That was their stated purpose, not proof of who they were or what happened to participants who reached the end.
What we can verify
The original image and contemporary reporting establish that the puzzle existed and that people followed its clues. Fast Company interviewed security researcher Joel Eriksson about the steps he took through the 2012 challenge. His account is a participant’s testimony, while the published clues are artifacts of the puzzle.
What remains unknown
No publicly verified identity for the organizers has been established in the sources reviewed here. Claims that an intelligence agency ran the puzzle are speculation. The unusual scale and elaborate clues make the theory appealing, but they do not identify a sponsor.
Examine the sources
Independent entertainment archive. Sources are linked so you can inspect the evidence and decide what you think.