List of Cryptographers - World War I and World War II Wartime Cryptographers

World War I and World War II Wartime Cryptographers

• Lambros D. Callimahos, US, NSA, worked with William F. Friedman, taught NSA cryptanalysts
• Ludomir Danielewicz, Poland, Biuro Szyfrow, helped to construct the Enigma maschine copies to break the ciphers
• Alastair Denniston, UK, director of GC&CS at Bletchley Park during World War II
• William F. Friedman, US, SIS, introduced statistical methods into cryptography
• Jack Good UK, GC&CS, Bletchley Park worked with Alan Turing on the statistical approach to cryptanalysis
• Nigel de Grey, UK, Room 40, played an important role in the decryption of the Zimmermann Telegram during World War I
• Dillwyn Knox, UK, Room 40 and GC&CS, broke commercial Enigma cipher as used by the Abwehr (German military intelligence)
• Solomon Kullback, US, SIS
• Frank W. Lewis, US, worked with William F. Friedman, puzzle master
• William Hamilton Martin and Bernon F. Mitchell, U.S. National Security Agency cryptologists who defected to the Soviet Union in 1960
• Leo Marks, UK, SOE cryptography director, author and playwright
• Donald Michie UK, GC&CS, Bletchley Park worked on Cryptanalysis of the Lorenz cipher and the Colossus computer
• Max Newman UK, GC&CS, Bletchley Park headed the section that developed the Colossus computer for Cryptanalysis of the Lorenz cipher
• Georges Painvin, broke the ADFGVX cipher during the First World War
• Marian Rejewski, Poland, Biuro Szyfrów, a Polish mathematician and cryptologist who, in 1932, solved the Enigma machine with plugboard, the main cipher device then in use by Germany.
• John Joseph Rochefort, US, made major contributions to the break into JN-25 after the attack on Pearl Harbor
• Frank Rowlett, US, SIS, leader of the team that broke Purple
• Jerzy Różycki, Poland, Biuro Szyfrów, helped break German Enigma ciphers
• Luigi Sacco, Italy, Italian General and author of the Manual of Cryptography
• Laurance Safford, US, chief cryptographer for the US Navy for 2 decades+, including World War II
• Abraham Sinkov, US, SIS
• John Tiltman, Brigadier, UK, Room 40, GC&CS, Bletchley Park, GCHQ, NSA. Extraordinary length and range of cryptographic service
• Alan Mathison Turing, UK, GC&CS, Bletchley Park where he was chief cryptographer, inventor of the Bombe that was used in decrypting Enigma, mathematician, logician, and renowned pioneer of Computer Science
• William Thomas Tutte, UK, GC&CS, Bletchley Park, with John Tiltman, broke Lorenz SZ 40/42 encryption machine (codenamed Tunny) leading to the development of the Colossus computer
• Gordon Welchman, UK, GC&CS, Bletchley Park where he was head of Hut Six (German Army and Air Force Enigma cipher decryption), he made an important contribution to the design of the Bombe
• Herbert Yardley, US, MI8, author "The American Black Chamber", worked in China as a cryptographer and briefly in Canada
• Henryk Zygalski, Poland, Biuro Szyfrów, helped break German Enigma ciphers