computer science

Identity interrogation

Identity interrogation 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 Identity interrogation rather than just read about it. In short: Identity interrogation is a method of authentication or identity proofing that involves posing one or more knowledge-based authentication questions to an individual. Identity interrogation questions such as "What is your mother’s maiden name?" or "What are the last four digits of your social security number?" It is a method businesses use to prevent identity theft or impersonation of customers.

Key takeaways

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

Reference excerpt

Identity interrogation is a method of authentication or identity proofing that involves posing one or more knowledge-based authentication questions to an individual. Identity interrogation questions such as "What is your mother’s maiden name?" or "What are the last four digits of your social security number?" It is a method businesses use to prevent identity theft or impersonation of customers. Identity interrogation is primarily employed during remote, not in-person interactions, such as with a teller at a bank. Many interactions that require user authentication over the Internet or the telephone employ Identity interrogation as a substitute for stronger authentication methods such as physical ownership authentication (i.e. presenting a driver's license or a bankcard), or biometrics (i.e. fingerprint or facial recognition) available mainly during in-person interactions. Identity interrogation is used to assist with risk management, account security, and legal and regulatory compliance during remote interactions. In addition, the technique was developed to assist in the prevention of identity fraud, or the illegal use of another person's identity to commit fraud or other criminal activities. Identity interrogation methods are most commonly used by governments, organizations and companies such as banks or financial intermediaries, credit card companies, internet providers, telecommunications companies, insurance providers and others.

Worked examples

Example 1 — a first encounter with Identity interrogation

Start with the simplest possible case. Write down what Identity interrogation 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 Identity interrogation 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 Identity interrogation 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 Identity interrogation

In research: Identity interrogation 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 Identity interrogation 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: Identity interrogation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer network security, Identity management, so understanding it makes those chapters shorter.
In everyday life: Look for Identity interrogation 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Identity interrogation in 20 minutes

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

Frequently asked questions

What is Identity interrogation in simple terms?

Why does Identity interrogation 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 Identity interrogation?

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 Identity interrogation.