Archives » Bill Tutte

Encryption Machines, Bletchley Park

Most of the endeavours at Bletchley Park were devoted to the decipherment of messages encrypted by machine – most famously the Enigma; but others were more imprortant to crack

An Enigma machine:-

An Enigma Machine, Bletchley Park

Enigma machine with explanation:-

enigma machine, WW2, Bletchley Park, codebreaking

A cabinet of Enigmas:-

enigma machines, Bletchley Park, WW2 ,codebreaking

A Cabinet of Enigma Machines at Bletchley Park

Remains of a Hungarian Enigma machine dug up from the earth somewhere in Europe:-

Remains of Hungarian Enigma Machine

4 Rotor Enigma machine:-

3 Rotor Enigma Machine, Bletchley Park

Enigma + diagram:-

Enigma Machine + Disagram, Bletchley Park

Hagelin Encryption Machine, Italian Naval cypher machine. Plus a German hand cypher sheet:-

Hagelin Encryption Machine, Bletchley Park

The enigma was cumbersome to use, requiring three operators, the typist, the noter down and the telegraphist – and required a similar number of personnel at the receiving end.

The Germans began to produce more complicated machines – with more encryption rotors and a faster transmission system.

Lorenz T 32 Encryption Machine. Amazingly Bill Tutte managed to work out how this machine worked only from the form of the messages it encrypted:-

Lorenz T 32 Encryption Machine, Bletchley Park

Siemens & Halske T52 Cypher Machine. Messages were typed in and encrypted automatically then transmitted by teleprinter to be decoded by the reverse machine at the other end. (The use of ordinary teleprinter letter encoding in this system was a weakness that the decoders were able to exploit):-

Siemens & Halske T52 Cypher Machine

Mansion Interior, Bletchley Park

One of the rooms here had an exhibition devoted to Bill Tutte, whose mathematical expertise helped to crack the fiendish Lorenz cypher (called Tunny by the codebreakers.) Tutte managed to describe how the Lorenz encryption machine worked without ever having seen an example of one.

The mansion is really lovely inside.

Entrance hall:-

Bletchley Park Mansion entrance


Bletchley Park Mansion Library 1

Mansion Library, Bletchley Park, codebreaking, WW2

Bletchley Park Mansion Library 4

Ornamental plastered ceiling:-

Bletchley Park Mansion room & ceiling

Another ornate ceiling:-

Bletchley Park, Mansion ornate ceiling

Bletchley Park, Mansion glass ceiling

One of the rooms has some lovely wood panelling:-

Bletchley Park, Mansion wood Panelling

Tiling on wall:-

Tiling in Mansion, Bletchley Park

Windows onto park:-

Windows, Bletchley Park Mansion

free hit counter script