Solving the Enigma of Kryptos
What does it say about the Central Intelligence Agency that its agents can crack the secret codes of enemy nations but can’t unravel a coded sculpture sitting outside their cafeteria window?
It says, perhaps, that artist Jim Sanborn, who created the cryptographic sculpture named Kryptos that sits on CIA grounds, could have a career in covert operations if he ever grows tired of stumping the experts.
Wired News: Solving the Enigma of Kryptos