Question 1

What is authentication?

Accepted Answer

Authentication is how an app checks that you are who you say you are, for example with an email and password.

Question 2

What is a real-life example of authentication?

Accepted Answer

At a members-only club, the doorman checks your membership card before letting you in. That check is authentication.

Question 3

What question does authentication answer?

Accepted Answer

Authentication answers "who are you?" by checking proof, like a password, a code or a membership card.

Question 4

Which of these is an example of authentication?

Accepted Answer

Logging in with a password proves who you are, so it is authentication. The others don't check your identity.

Question 5

Where should the app check that your password is correct?

Accepted Answer

Password checks happen in the backend, where people can't see or change the rules. The frontend only collects what you type.

What is authentication?

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