"When the clock plugs were substituted for the original ones in the Enigma plugboard, the electrical current was directed through the clock. By simply turning the large knob on the clock, the Enigma operator could select 40 different plugging arrangements without actually re-arranging the plugs."
Click here to read the related story on the National Cryptologic Museum, and click here to check out the entire Road Trip 2010 package.
August 6, 2010 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
Conversation powered by Livefyre