Kryptos

On November 3, 1990, a new sculpture was dedicated on the grounds of the CIA in Langley, Virginia. The sculpture was composed of four encrypted messages and entitles “Kryptos” by its creator, Jim Sanborn. In the 25 years since its dedication, three of these encrypted messages have been deciphered, but the fourth remains a mystery. Now known as one of the most famous unsolved codes in the world, the “Kryptos” is a fascinating lure for both amateur and professional cryptanalysts who, despite several clues from the sculptor, have been unable to crack the code.