This undated photo provided by the Central Intelligence Agency shows the 1990 dedicated sculpture "Kryptos" by James Sanborn at the Central Intelligence Agency in McLean, Va. ("Kryptos" © Copyright 1988 James Sanborn, All rights reserved/Photo Courtesy of CIA via AP)

BOSTON (AP) — When Jim Sanborn was commissioned to create a sculpture at CIA headquarters, he wanted to do something that spoke to its world of spies and secret codes.

The result was a 10-foot-tall, S-shaped copper screen called Kryptos that resembles a piece of paper coming out of a fax machine. One side features a series of staggered alphabets that are key to decoding the four encrypted messages on the other side.

“At the time, codes and encoding was an esoteric subject,” Sanborn said. “I wanted it to be less so, and I wa

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