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Dillwyn Knox

(23 July 1884 – 27 February 1943) He attended the Summer Fields School and the College in Eaton. Then, he studied at the King’s College in Cambridge. During the 1st World War Dillwyn Knox worked in the decryption unit “Room 40” established by the Great Britain Navy. He was an eminent and talented cryptologist with large, practical experience. Within the British delegation he participated in the Polish-British-French conference of military intelligence services in Pyry at which Polish cryptologists revealed methods of breaking German ciphers. After the outbreak of the 2nd World War and until his death he worked in the Bletchley Park dealing with decryption of German and Italian ciphertexts.


Maksymilian Ciężki

Alastair Denniston

Dillwyn Knox

Gwido Langer

Marian Rejewski

Jerzy Różycki


Alan Turing

Henryk Zygalski