Kryptos' final secret message includes phrase 'Berlin clock'
(Newser) -
Jim Sanborn punched four messages into his curved copper sculpture, which has sat outside CIA headquarters in Langley, Va., since 1990. The first three messages of "Kryptos" were decoded by NSA cryptographers in 1993, then by fans in 1999. The 97-character fourth message, however, has stumped code breakers for...