Enigma Machine Demonstration

this enigma one machine manufactured in the early 1940s for the German Wehrmacht comes in its original oak case when I unscrew the locking bolts and lift the hinged lid the battery compartment is visible on the right the state or the three rotors and the reflector are lettered with the B in red are visible before a message was encoded these had to be removed and programmed according to the settings for the given day I lift out the three rotors on their spindle and slide each one off on the right side of this rotor note the 26 brass electrical contacts and the adjustable ring and on the left the bakelite thumb wheel I adjust the ring setting on one of the rotors and reassemble the three rotors in a new order on the spindle each rotor has an identifying roman rotor number finally i reinsert the rotors on the spindle and lock the entire assembly in place note how the rightmost rotor advances with each keystroke after one full revolution the rotor to the left will advance by one position resetting the pattern of the electrical contacts a further level of security is provided by the front plug board or sticker Brett there are 26 double sockets and 13 cables each with two pins the German military generally used 10 cables here all 13 are attached finally I close the machine lid and the front flap of the case to ensure that the cables are correctly positioned next we set the power supply to external and set the rotors to the three-letter key for the day let's type in the word enigma when the e is pressed the bulb for J turns on and the right-hand rotor advances one increment similarly n becomes t ir g.b.m e and a/c in this segment we see how the rotor turns with each keystroke the hair marked version of the Enigma machine used numbered positions for each letter not the letters themselves each number corresponds to a letter of the alphabet a is o1 b o 2 and so on to decode i reset the rotors to the initial position in practice the operator would provide a new encoded setting in the message note how in decipherment j becomes e the TN the RI until our original worm one-word plaintext enigma is revealed you

Channel: Doyle New York

Views: 35,440

Rating: 4.9176469 out of 5

Keywords: enigmamachine, WWII, encryption, decryption, auction, sale, coding

Id: -mdSvGUd0_c

Length: 3min 4sec (184 seconds)

Published: Mon Oct 30 2017