The story mentions David Kahn's "monumental history of cryptology". The book is The Codebreakers,[1] and IMO is definitely worth reading. It's quite long, perha

The story mentions David Kahn's "monumental history of cryptology". The book is The Codebreakers,[1] and IMO is definitely worth reading. It's quite long, perhaps too detailed for most people. But it's filled with little gems. E.g. did you know that Thomas Jefferson invented the "wheel cypher",[2] a very elegant and practical device used in secret communication? [1] http://en.wikipedia.org/wiki/The_Codebreakers http://en.wikipedia.org/wiki/The_Codebreakers [2] http://en.wikipedia.org/wiki/Jefferson_disk http://en.wikipedia.org/wiki/Jefferson_disk