computer science

Lawrie Brown

Lawrie Brown 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 Lawrie Brown rather than just read about it. In short: Lawrence Peter "Lawrie" Brown is a cryptographer and computer security researcher, currently a (retired and now visiting) Senior Lecturer with UNSW Canberra at the Australian Defence Force Academy. His notable work includes the design of the block ciphers LOKI and the AES candidate LOKI97.

Key takeaways

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

Reference excerpt

Lawrence Peter "Lawrie" Brown is a cryptographer and computer security researcher, currently a (retired and now visiting) Senior Lecturer with UNSW Canberra at the Australian Defence Force Academy. His notable work includes the design of the block ciphers LOKI and the AES candidate LOKI97. He received his Ph.D. in mathematics from the University of New South Wales in 1991 under the supervision of Jennifer Seberry, with a dissertation on the design of LOKI and the cryptanalysis of the Data Encryption Standard. Subsequently, his research changed focus to the Safe Erlang mobile code system, to aspects of trust issues in eCommerce with some of his Ph.D. students, and with the use of Proxy Certificates for Client Authentication.

Publications Computer Security: Principles and Practice, 3/e, Pearson Education, 2015

Personal interests According to his personal homepage, Brown's social activities include dancing a number of different styles. He has also composed some of his own dances. He enjoys reading science fiction and is an amateur radio enthusiast. Brown is a practicing Baptist.

References

External links Lawrie Brown's page at UNSW Canberra (ADFA)

Worked examples

Example 1 — a first encounter with Lawrie Brown

Start with the simplest possible case. Write down what Lawrie Brown 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 Lawrie Brown 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 Lawrie Brown 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 Lawrie Brown

In research: Lawrie Brown 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 Lawrie Brown 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: Lawrie Brown is common in secondary-school and first-year university syllabi. It links to neighbouring topics Australian computer scientists, Computer security academics, Cryptographer stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Lawrie Brown 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 Lawrie Brown in 20 minutes

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

Frequently asked questions

What is Lawrie Brown in simple terms?

Why does Lawrie Brown 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 Lawrie Brown?

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 Lawrie Brown.