The Beginning of Allied Successes Against Enigma

Chris Christensen

Department of Mathematics and Statistics

Northern Kentucky University

The Polish Solution of the German Enigma Machine

Warsaw, Poland

Marian Rejewski

Henryk Zygalski

Jerzy Rozycki

Antoni Palluth

Bletchley Park IEEE Milestone

Bletchley Park

Alan Turing

Gordon Welchman

Harold “Doc” Keen

NCML Dayton, Ohio IEEE Milestone

Washington, D.C. and Dayton, Ohio

OP-20-GM

Bomba KryptologicznaIEEE Milestone

Warsaw, Poland

Enigma

Enigma 26 26 26 17,576

Rotor System

http://en.wikipedia.org/wiki/Enigma_rotor_details

6 26 26 26 105,456

Rotor Setting

Indicators

1 2 3 4 5 6N K U N K U

C V G O N B J L A

Clicks

CXN

CXQ

N P

N P

2 3 5 6K U K U

C X N Q

1 4N NP Q P W X

Indicators

1 2 3 4 5 6R T J A H I KH P L R A K TD Q X L

W WW W

W S K W R

Indicators

1 2 3 4 5 6R T J A H I KH P L R A K TD Q X L

W WW W

W S K W R

RTJ

RTM

? W

? W

HPN

HPQ

? W

? W

DQY

DQB

? W

? W

Bomba Kryptologiczna

Indicators and Menus

RTJ

RTM

? W

? W

HPN

HPQ

? W

? W

DQY

DQB

? W

? W

Bletchley Park Memorial

Turing-Welchman BombeIEEE Milestone

Bletchley Park, England

Cribs and Menus

Turing-Welchman Bombe

Double-ended Scrambler

http://www.codesandciphers.org.uk/

Diagonal Board

The Bomba and the Bombe

US Navy Cryptologic BombeIEEE Milestone

Dayton, Ohio

4-Rotor Naval Enigma

US Navy Cryptologic Bombe

Poland – Britain – United States

Bombes

US Navy Cryptologic BombeNSA National Cryptologic Museum

Turing-Welchman Bombe RebuildBletchley Park

Bomba Kryptologiczna

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