Seven Unbreakable Ciphers

Calling all cryptologists! Wired has compiled seven of the world's toughest ciphers and codes, claiming that they cannot be broken. These include the 1400s Voynich Manuscript (shown left), the Zodiac Killer Cipher and Kryptos, a cipher found on a sculpture at the CIA headquarters. All of these have been attempted by scholars around the world but no one has been able to break the codes.