Cicada 3301

An anonymous group posted the internet's hardest puzzle in 2012 — cryptography, hidden book codes, real-world locations — and never revealed who they were or what they wanted.

Cicada 3301 refers to a series of elaborate puzzles posted anonymously online between 2012 and 2014, involving advanced cryptography, steganography, and real-world scavenger-hunt elements. The puzzles' creators, purpose, and identity have never been confirmed, making it one of the most-discussed unsolved mysteries of the internet era.

⇄disputed

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Quick facts

→The first puzzle appeared on 4chan on January 4, 2012, and led solvers through a chain of increasingly difficult cryptographic and steganographic challenges.
→Puzzle solutions led to real physical locations in multiple countries, where solvers found posters with further clues.
→The stated goal, per messages signed "3301," was recruiting "intelligent individuals" — the actual purpose was never confirmed.
→The final, third puzzle round from 2014 remains completely unsolved to this day.

Entities on file

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Cicada 3301 (document)

Anonymous series of elaborate internet puzzles posted 2012-2014; creators and purpose never confirmed.

No outgoing connections on file.

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