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Two centuries on, code that stumped Jefferson cracked – Daily News & Analysis

July 2nd, 2009

Two centuries on, code that stumped Jefferson cracked
Daily News & Analysis
The cipher–sent to Jefferson in 1801 by mathematician Robert Patterson as an example of the perfect code–piqued the interest of cryptologist Lawren
Two Centuries On, a Cryptologist Cracks a Presidential CodeWall Street Journal

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