Cryptologist Cracks 200-Year Old Code

A 200-year old code has finally been cracked! The recipient of the code was President Thomas Jefferson. The sender: Robert Patterson, a professor at the University of Pennsylvania.

Now, I'm no mathematician, so forget my trying to explain HOW it was cracked. I'm simply provide you with the following link to a Wall Street Journal article that lays it all out...

"Two Centuries On, a Cryptologist Cracks a Presidential Code"