Stood outside the CIA's headquarters in Langley, Virginia, is a mystery that has eluded the agency's brightest minds for 35 years. A curving metal sculpture, known as Kryptos, was built by the artist ...

The Kryptos structure had a wall of encrypted text that hid four messages in what looked like words on a sheet, and the fourth was now solved.

Kryptos, a work of art made of encrypted code, sits on the grounds of the C.I.A. Headquarters in Virginia After a 35-year quest, the final solution to a famous puzzle called Kryptos has been found.