computer science

Mitsuru Matsui

Mitsuru Matsui 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 Mitsuru Matsui rather than just read about it. In short: Mitsuru Matsui (松井充, Matsui Mitsuru; born September 16, 1961) is a Japanese cryptographer and senior researcher for Mitsubishi Electric Company. Career While researching error-correcting codes in 1990, Matsui was inspired by Eli Biham and Adi Shamir's differential cryptanalysis, and discovered the technique of linear cryptanalysis, published in 1993.

Key takeaways

Mitsuru Matsui 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 Mitsuru Matsui to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mitsuru Matsui from memory before moving on to harder problems.

Reference excerpt

Mitsuru Matsui (松井充, Matsui Mitsuru; born September 16, 1961) is a Japanese cryptographer and senior researcher for Mitsubishi Electric Company.

Career While researching error-correcting codes in 1990, Matsui was inspired by Eli Biham and Adi Shamir's differential cryptanalysis, and discovered the technique of linear cryptanalysis, published in 1993. Differential and linear cryptanalysis are the two major general techniques known for the cryptanalysis of block ciphers. The following year, Matsui was the first to publicly report an experimental cryptanalysis of DES, using the computing power of twelve workstations over a period of fifty days. He is also the author of the MISTY-1 and MISTY-2 block ciphers, and contributed to the design of Camellia and KASUMI. For his achievements, Matsui got the 2012 RSA Conference Award for Excellence in Mathematics.

External links Mitsuru Matsui at DBLP Bibliography Server

Worked examples

Example 1 — a first encounter with Mitsuru Matsui

Start with the simplest possible case. Write down what Mitsuru Matsui 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 Mitsuru Matsui 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 Mitsuru Matsui 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 Mitsuru Matsui

In research: Mitsuru Matsui 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 Mitsuru Matsui 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: Mitsuru Matsui is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cryptographer stubs, Japanese academic biography stubs, Living people, so understanding it makes those chapters shorter.
In everyday life: Look for Mitsuru Matsui 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 Mitsuru Matsui in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mitsuru Matsui 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 Mitsuru Matsui out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mitsuru Matsui in simple terms?

Mitsuru Matsui (松井充, Matsui Mitsuru; born September 16, 1961) is a Japanese cryptographer and senior researcher for Mitsubishi Electric Company. Career While researching error-correcting codes in 1990, Matsui was inspired by Eli Biham and Adi Shamir's differential cryptanalysis, and discovered the…

Why does Mitsuru Matsui 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 Mitsuru Matsui?

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 Mitsuru Matsui.