Ciphers that Remain Unsolved

Here is more about the Kryptos sculpture on the grounds of the headquarters of the U.S. Central Intelligence Agency in Langley, Virginia, which is named the “George Bush Center for Intelligence”. It contains four encrypted passages, the first three of which have been solved.

As befits a U.S. “Center for Intelligence”, the plaintext of the three solved messages is known to contain four spelling errors, three of which the artist says were intentional.

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