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200-Year-Old Presidential Code Cracked

Mathematician unravels cipher that stumped Jefferson

By Rob Quinn,  Newser Staff

Posted Jul 2, 2009 2:31 AM CDT

(Newser) – A code that stumped Thomas Jefferson and other cryptologists for over two centuries has finally been cracked, the Wall Street Journal reports. The cipher—sent to Jefferson in 1801 by mathematician Robert Patterson as an example of the perfect code—piqued the interest of defense...   Read full story »

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