An unsolved mystery has hidden in plain sight at the headquarters of the Central Intelligence Agency (CIA) in Langley, Virginia. It has nothing to do with covert spies, double agents or state secrets.

A secret code hidden inside a century-old vintage silk dress that had eluded cryptographers for a decade has finally been cracked, throwing some light on the identity of the woman who owned the attire ...

When artist Jim Sanborn talks about “Kryptos,” his sculpture at the CIA headquarters, and the famously unsolved secret code engraved in its copper panels, he sounds as if he’s talking about espionage, ...

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 ...

This undated photo provided by the Central Intelligence Agency shows the 1990 dedicated sculpture "Kryptos" by James Sanborn at the Central Intelligence Agency in ...

It is one of the world's most famous unsolved codes whose answer could sell for a fortune -- but two US friends say they have already found the secret hidden by "Kryptos." ...