Age, Biography and Wiki

John R.F. Jeffreys was born on 25 January, 1916. Discover John R.F. Jeffreys's Biography, Age, Height, Physical Stats, Dating/Affairs, Family and career updates. Learn How rich is He in this year and how He spends money? Also learn how He earned most of networth at the age of 28 years old?

Popular As N/A
Occupation N/A
Age 28 years old
Zodiac Sign Aquarius
Born 25 January, 1916
Birthday 25 January
Birthplace N/A
Date of death 13 January 1944
Died Place N/A
Nationality

We recommend you to check the complete list of Famous People born on 25 January. He is a member of famous with the age 28 years old group.

John R.F. Jeffreys Height, Weight & Measurements

At 28 years old, John R.F. Jeffreys height not available right now. We will update John R.F. Jeffreys's Height, weight, Body Measurements, Eye Color, Hair Color, Shoe & Dress size soon as possible.

Physical Status
Height Not Available
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Dating & Relationship status

He is currently single. He is not dating anyone. We don't have much information about He's past relationship and any previous engaged. According to our Database, He has no children.

Family
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John R.F. Jeffreys Net Worth

His net worth has been growing significantly in 2022-2023. So, how much is John R.F. Jeffreys worth at the age of 28 years old? John R.F. Jeffreys’s income source is mostly from being a successful . He is from . We have estimated John R.F. Jeffreys's net worth , money, salary, income, and assets.

Net Worth in 2023 $1 Million - $5 Million
Salary in 2023 Under Review
Net Worth in 2022 Pending
Salary in 2022 Under Review
House Not Available
Cars Not Available
Source of Income

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Timeline

1940

Jeffreys was put in charge of a small section manufacturing perforated sheets for use in the cryptanalysis of the Enigma, a task which took over three months, completed on 7 January 1940. One type were the Zygalski sheets, known as Netz at Bletchley Park, a technique revealed to the British by Polish cryptologists. Another type, named "Jeffreys sheets", were different, and were a "catalogue of the effect of any two Enigma rotors and the reflector". Jeffreys's perforated sheets were used by Polish cryptologists in exile in France to make the first wartime decryption of an Enigma message on 17 January 1940.

In early 1940, a section called "Hut 6" — named after the building in which it was initially housed — was created to work on solving German Army and Air Force Enigma messages. Jeffreys was chosen to run the hut alongside Welchman. Jeffreys was in charge of "Sheet-Stacking and Machine Room activities", while Welchman handled "Registration, Intercept Control, Decoding, and relations with the intelligence people in Hut 3".

In May 1940, Jeffreys took a vacation, but became ill and was diagnosed with tuberculosis and diabetes. He died in January 1944.

1939

A research fellow at Downing College, Cambridge, Jeffreys joined the codebreaking efforts at Bletchley Park in September 1939 alongside fellow Cambridge mathematicians Gordon Welchman, with whom he had previously worked closely, and Alan Turing. These three, together with Peter Twinn and working under Dilly Knox, formed the research section working on the German Enigma machine, and were housed in "The Cottage" at Bletchley Park.

1916

John Robert Fisher Jeffreys (25 January 1916 – 13 January 1944) was a British mathematician and World War II codebreaker.