Dilly KnoxApril 1937
Breaks a modified commercial Enigma system used by forces supporting Franco in the Spanish Civil War.
Great Britain · Warfare / World War, 2nd. Chronological records rendered directly from the World History Database.
Breaks a modified commercial Enigma system used by forces supporting Franco in the Spanish Civil War.
Leads service-section staff, including the Enigma team, during the Bletchley Park wartime rehearsal.
Takes his Enigma team to Bletchley Park during the GC&CS wartime rehearsal.
Represents GC&CS at the January Paris meeting with Polish and French cryptologists.
Attends the January Paris meeting and assesses the allied position against military Enigma.
Learns at Pyry that Poland has reconstructed military Enigma and built working cryptanalytic machinery.
Receives a detailed explanation of the Polish solution to military Enigma at Pyry.
The day after the UK declared war on Germany, Turing reports to Bletchley Park, the wartime station of GC&CS
Rejoins GC&CS as head of the German Naval subsection, whose principal cipher challenge is Naval Enigma.
Joins Bletchley Park and begins work on the large-scale problem of German Army and Luftwaffe Enigma.
Receives responsibility for the Enigma decryption teams and works alongside Turing and Welchman.
The first operational break into Enigma when the team working under Dilly Knox, with the mathematicians John Jeffreys, Peter Twinn and Alan Turing, unravelled the German Army administrative key that became known at Bletchley Park as The Green, encouraged by this success, the codebreakers later crack the Red key used by the Luftwaffe
The first operational break into Enigma when the team working under Dilly Knox, with the mathematicians John Jeffreys, Peter Twinn and Alan Turing, unravelled the German Army administrative key that became known at Bletchley Park as The Green, encouraged by this success, the codebreakers later crack the Red key used by the Luftwaffe
The first operational break into Enigma when the team working under Dilly Knox, with the mathematicians John Jeffreys, Peter Twinn and Alan Turing, unravelled the German Army administrative key that became known at Bletchley Park as The Green, encouraged by this success, the codebreakers later crack the Red key used by the Luftwaffe
The first operational break into Enigma when the team working under Dilly Knox, with the mathematicians John Jeffreys, Peter Twinn and Alan Turing, unravelled the German Army administrative key that became known at Bletchley Park as The Green, encouraged by this success, the codebreakers later crack the Red key used by the Luftwaffe
Meets Polish cryptanalysts in Paris and absorbs techniques that influence the British Bombe design.
Takes charge of Hut 6 as it develops industrial-scale attacks on Army and Luftwaffe Enigma.
The first bombe is installed
Leads British Tabulating Machine engineering work that turns Turing's Bombe design into operational hardware.
Breaks several German Naval Enigma messages from late 1938 using the Fort crib method.
Joins senior Hut 6 cryptanalysts protesting a proposed transfer of the Luftwaffe Red Enigma task.
Oversees engineering of the improved Bombe known as Agnus Dei, incorporating Welchman's diagonal board.
Introduces the diagonal board, sharply reducing false stops and making the Bombe far more effective.
Works in Hut 6 on German Army and Luftwaffe Enigma before later transferring to Naval Enigma.
Joins Hut 6 and applies advanced mathematics to German Army and Luftwaffe Enigma.
Arrives at Bletchley Park and is assigned to Turing's Hut 8 team working on Naval Enigma.
Becomes skilled in Banburismus, reducing the Bombe processing required for Naval Enigma.
Joins Dilly Knox's team and learns techniques for attacking Enigma variants used by Axis forces.
Works in Hut 6 on German Army and Luftwaffe Enigma and helps organise the growing cryptanalytic operation.
Works with Dilly Knox's section on Enigma variants used by German intelligence and other Axis organisations.
Leads Hut 6 as regular Luftwaffe Enigma reading begins to provide operational intelligence.
Shows visiting American intelligence officers the British Bombe during the Sinkov Mission.
Leads cryptanalysis of Italian naval Enigma traffic that contributes intelligence before Cape Matapan.
Helps Knox's team read Italian naval Enigma traffic before the Battle of Cape Matapan.
Orders a boarding party onto disabled U-110, enabling capture of an intact Enigma machine and code material.
Boards U-110 and recovers an Enigma machine, rotors, codebooks and current cryptographic material.
Participates in the U-110 capture operation that secures valuable German Enigma material.
Works in Hut 8 as captured U-boat material helps restore access to German Naval Enigma traffic.
Uses captured German naval cryptographic material to strengthen Hut 8 attacks on U-boat Enigma.
Joins Hut 8 to work on German Naval Enigma immediately after completing his Cambridge examinations.
Has set up a good working system for decrypting Enigma signals but there were only a few bombes so not enough time to translate all the signals, in the summer there was considerable success and shipping losses had fallen to under 100,000 tons a month
Orders urgent priority for Bletchley Park resources after receiving the codebreakers' appeal for more support.
Make sure they have all they want on extreme priority and report to me that this has been done.", more than two hundred bombes were in operation by the end of the war.
This record states: Churchill then wrote a memo to General Ismay which read: "ACTION THIS DAY.
This record states: Writes directly to Churchill spelling out his difficulties emphasising how small the need is compared with the vast expenditure of men and money by the forces and compared with the level of assistance they could offer.
Moves to Hut 8 and joins the concentrated effort against German Naval Enigma.
Becomes head of the GC&CS Naval Section as Naval Enigma assumes growing importance in the Atlantic.
Develops a strong reputation for finding useful cribs in German Naval Enigma traffic.
Leaves Hut 8 to become deputy to Dilly Knox in the section attacking Abwehr Enigma.
Faces the loss of readable U-boat traffic when four-rotor Naval Enigma creates the Shark blackout.
Visits U.S. Navy cryptanalysts and argues for closer sharing of Enigma results and methods.
Carries captured U-559 codebooks and Enigma material from the sinking submarine to the British boarding party.
Boards sinking U-559 and retrieves Enigma key material before drowning when the submarine founders.
Enters U-559 with Fasson and helps recover documents vital to renewed attacks on four-rotor Naval Enigma.
Travels to Washington and helps negotiate full collaboration with the U.S. Navy on communications intelligence.
Joins Birch in Washington negotiations that strengthen British-American cooperation against Naval Enigma.
Works on the specialised Abwehr-Enigma Bombe Funf, installed at Bletchley Park in November.
Helps restore reading of four-rotor U-boat Enigma as Hut 8 breaks Shark again in December.
Works in the Naval Section's U-boat watch as renewed Enigma decrypts begin arriving after the December Shark break.
Contributes to the December recovery of four-rotor Shark, ending a prolonged Naval Enigma blackout.
Leads Hut 8 work on the four-rotor Naval Enigma problem during the Shark blackout.
Works in Hut 8 on German Naval Enigma and contributes to the attack on four-rotor Shark traffic.
Becomes head of the ISK section responsible for cryptanalysis of German Abwehr Enigma.
Sees the specialised Abwehr-Enigma Bombe Eureka installed as ISK expands mechanised attacks.
Becomes head of Machine Coordination and Development, overseeing mechanised support for Enigma cryptanalysis.
Heads Hut 6 Research and supports increasingly systematic attacks on German Army and Luftwaffe Enigma.
Serves as Assistant Director of Machines and Mechanical Devices while Bombe operations continue supporting Enigma exploitation.
Sees Oracle, the third specialised Twinn-type Bombe for Abwehr Enigma, installed in May.
Supports D-Day intelligence planning that directs 30 Assault Unit to seize German Enigma machines, codebooks and cipher material.
Remains in Hut 8 through the end of the European war, continuing work on German Naval Enigma.
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