computer science

Nigel de Grey

Nigel de Grey is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nigel de Grey rather than just read about it. In short: Nigel de Grey (27 March 1886 – 25 May 1951) was a British codebreaker. Son of the rector of Copdock, Suffolk, and grandson of the 5th Lord Walsingham on his father's side and Spencer Ponsonby-Fane on his mother's, he was educated at Eton College and became fluent in French and German.

Key takeaways

Nigel de Grey belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nigel de Grey to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nigel de Grey from memory before moving on to harder problems.

Reference excerpt

Nigel de Grey (27 March 1886 – 25 May 1951) was a British codebreaker. Son of the rector of Copdock, Suffolk, and grandson of the 5th Lord Walsingham on his father's side and Spencer Ponsonby-Fane on his mother's, he was educated at Eton College and became fluent in French and German. In 1907 he joined the publishing firm of William Heinemann. As he was shy and physically small, a colleague labelled him "the dormouse".

World War I Nigel de Grey joined the Royal Naval Volunteer Reserve and served in Belgium. In September 1915 he was transferred to Naval Intelligence Division, Room 40 codebreaking section. He, Dilly Knox and Reverend William Montgomery decrypted the Zimmermann Telegram on 17 January 1917. The Zimmermann Telegram was from the German foreign secretary Arthur Zimmermann to the German ambassador Heinrich von Eckardt in Mexico, telling him to offer the Mexican government the return of the states of Arizona, Texas and New Mexico as an inducement to Mexico to side with Germany against the United States. The public disclosure of this secret Mexican-German pact brought the US into World War I. Later in 1917, de Grey was promoted, assigned to run the NID's Mediterranean section in Rome, to liaise with the director of Italian naval intelligence and to focus on Austrian cipher traffic.

World War II In World War II Nigel de Grey was assigned to the Government Code and Cypher School (GC&CS) at Bletchley Park, where he concentrated on German traffic encrypted on the Enigma cipher machine. In September 1941 he provided a report to the Prime Minister with the first references from German authorities to their own police battalions systematically levelling villages and removing their populations. One signal boasted of 30,000 executions "in the central area". Following a warning made in a speech to parliament by Churchill, a German circular in October 1941 cautioned that no further references to "sensitive operations" should be made on wireless channels. The intelligence collected by De Grey from the German Domino cypher later played an indirect role in building the evidence case at the Nuremberg Trials. After World War II de Grey remained with GC&CS, which became GCHQ in 1946. Eventually he became a deputy director and led a team working on Soviet cable traffic. He retired in 1951 and died a very short time later of a heart-attack in Piccadilly, London. His wife, whom he married in 1910, survived him.

References

Nigel West, "Grey, Nigel Arthur de (1886-1951)" in the Oxford Dictionary of National Biography Paul Gannon, "Inside Room 40: The Codebreakers of World War I", London, 2010

Worked examples

Example 1 — a first encounter with Nigel de Grey

Start with the simplest possible case. Write down what Nigel de Grey claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nigel de Grey before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nigel de Grey ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nigel de Grey

In research: Nigel de Grey appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nigel de Grey in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nigel de Grey is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1886 births, 1951 deaths, 20th-century cryptographers, so understanding it makes those chapters shorter.
In everyday life: Look for Nigel de Grey outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nigel de Grey in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nigel de Grey means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nigel de Grey out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nigel de Grey in simple terms?

Why does Nigel de Grey matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nigel de Grey?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nigel de Grey.