The world's most difficult code to decipher: no one has been able to solve it so far!
Speaking of passwords, we may associate with a very long string of numbers, but in fact more than that, many passwords in history are very peculiar, and even passed down for a hundred years and a thousand years can not be solved. The world's most difficult to decipher code, it is a sculpture work, located on the square of the United States Central Intelligence Agency, so far no one can solve it, interested friends to take a look!
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