The final mystery of Kryptos is known as the 'Everest of codes' among the thousands of cryptographers who are obsessed with deciphering it A Clue To CIA Mystery That Has Defeated The World's Codebreakers -- The Telegraph
A cryptic puzzle known as the Kryptos, located outside the CIA's headquarters, is testing the world's finest code crackers.
There is at least one secret that remains stubbornly safe in the leak-plagued global superpower. Indeed, the enigma stares the spies of the Central Intelligence Agency in the face each day.
Twenty years after it was unveiled in the main courtyard of the CIA headquarters in the USA, a sculpture of curving copper panels still contains an encrypted message hidden in a bewildering jumble of 1,800 characters.
Read more ....