Friday, July 03, 2009
More than 200 years ago, Thomas Jefferson received a letter in a cipher that has only just been broken (by, as it happens, a cryptographer in a government facility not a mile from my house). Turned out it was a joke, albeit a respectful one.
Speaking of Thomas Jefferson, he also invented an encryption device, the Jefferson Disk.
You can read more about it at wikipedia:
There is only one "slight" problem with this wikipedia entry. They use "heilhitler" as the text to show how this device worked.