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The National Cipher Challenge

Kryptos

One of the most notorious open cipher challenges, the Kryptos sculpture in Langley, has been solved by the age old technique of document search. The story of how it was done can be read in this fabulous article in Scientific American!

https://www.scientificamerican.com/article/a-solution-to-the-cias-kryptos-code-is-found-after-35-years
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