The US 6812 Division Bombe Report Eastcote 1944 Page 3

Tony Sale's Codes and Ciphers

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Chapter I. Theory of Decoding and Decoding Machines.


Table of Contents.

Descripticn Of Enigma Machine............................ page 1.

Preparation of Enigma Machine for operation.............. page 2.

Operation of the Enigma Machine.......................... page 2.

Emergency Stecker Board Patching......................... page 3.

Security of the Enigma Machine........................... page 3.

First Steps In "Breaking" Enigma Machine Messages -
Preparation of Crib...................................... page 3.

Hand Solution............................................ page 4.

Bombe (Machine) Solutions................................ page 5.

Preparation of Menu...................................... page 7.

Setting Up Menu On Bombe................................. page 9.

Checking Bombe Stops..................................... page 12.

Check Stops.............................................. page 15.

Types of Menus........................................... page 25.

Double Input............................................. page 25.

Single Input With Subsidiary............................. page 2?.

Double Input With Subsidiary............................. page 27.

C.S.K.O.(Consecutive Stecker Knock Out).................. page 29.

Cilly Settings........................................... page 29.

Phantom Links............................................ page 31

Self Steckere Menus...................................... page 31

Prohibitive or Mandatory Steckered Menus................. page 32.

S.S.S. (Single Self Steckered) Menus..................... page 33.

Dummy Letter Menus....................................... page 34.

Query letter Menus....................................... page 35.

Middle Whee1 Turnover Menus.............................. page 37.
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