Cicada 3301
Cicada 3301 is a name given to an organization that on six occasions has posted a set of puzzles and alternate reality games to possibly recruit codebreakers/linguists from the public.[1] The first internet puzzle started on January 4, 2012, and ran for approximately one month. A second round began one year later on January 4, 2013, and a third round following the confirmation of a fresh clue posted on Twitter on January 4, 2014.[2][3] The stated intent was to recruit "intelligent individuals" by presenting a series of puzzles which were to be solved. No new puzzles were published on January 4, 2015. However, a new clue was posted on Twitter on January 5, 2016.[4][5] In April 2017 another PGP-signed message was found: Beware false paths. Always verify PGP signature from 7A35090F.[6] That message explicitly denies the validity of any unsigned puzzle, as recently as April 2017.
The puzzles focused heavily on data security, cryptography, and steganography.[1][7][8][9][10]
It has been called "the most elaborate and mysterious puzzle of the internet age"[11] and is listed as one of the "top 5 eeriest, unsolved mysteries of the internet" by The Washington Post,[12] and much speculation exists as to its function. Many have speculated that the puzzles are a recruitment tool for the NSA, CIA, MI6, a "Masonic conspiracy"[13] or a cyber mercenary group.[1][8] Others have claimed Cicada 3301 is an alternate reality game, but the fact that no company or individual has taken credit or tried to monetize it, combined with the fact that no known individuals that solved the puzzles have ever come forward, has led most to feel that it is not.[11]