Chris Christensen Department of Mathematics and Statistics Northern Kentucky University
Jerzy Rozycki Henryk Zygalski Marian Rejewski
abcdefghijklmnopqrstuvwxyz OHELCPYBSURDZTAFXKINJWVQGM (ao)(bh)(ce)(dl)(fp)(gy)(is)(ju)(kr)(mz)(nt)(qx)(vw)
6 ways to order the rotors. 17,576 ways to set the rings against the rotor cores. 105,456
6 ways to order the rotors. 17,576 ways to set the rings against the rotor cores. 100,391,791,500 ways to set the plugboard. 10,586,916,764,424,000
RTJ WAH WIK First Enigma pair Ciphers 1 and 4 Z and Z + 3
RTJ WAH WIK DQY DWJ MWR First Enigma pair Ciphers 1 and 4 Z and Z + 3 Second Enigma pair Ciphers 2 and 5 (Z + 15)+1 and (Z + 15)+1+3
RTJ WAH WIK DQY DWJ MWR HPB RAW KTW First Enigma pair Ciphers 1 and 4 Z and Z + 3 Second Enigma pair Ciphers 2 and 5 (Z + 15)+1 and (Z + 15)+1+3 Third Enigma pair. Ciphers 3 and 6 (Z + 18)+2 and (Z + 18)+2+3
RTJ WAH WIK DQY DWJ MWR HPB RAW KTW Middle rotor offsets Z Z + 23 (Z + 23) + 25 Left (slow) rotor offsets Z Z + 12 (Z+ 12)+4
Alan Turing Gordon Welchman
Harold “Doc” Keen
Joe Desch
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