API key authentication in Rest API - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is API key authentication?

API key authentication is a method where a client sends a unique key with each request to identify and authorize access to an API.

beginner

How is an API key usually sent in a request?

An API key is commonly sent in the request header, for example using the 'Authorization' header or a custom header like 'x-api-key'.

beginner

Why should API keys be kept secret?

API keys grant access to protected resources. If exposed, unauthorized users can misuse the API, causing security risks and potential data leaks.

intermediate

What is a common way to generate an API key?

API keys are often generated as long, random strings or tokens that are hard to guess, ensuring secure identification of clients.

intermediate

What is a limitation of API key authentication?

API key authentication does not verify the identity of the user, only the possession of the key, so it is less secure than methods like OAuth.

Where is an API key typically included in an HTTP request?

A In the URL path

B In the response body

C In the request header

D In the server logs

API keys are usually sent in the request header to keep them secure and separate from the URL.

What is the main purpose of an API key?

A To identify and authorize the client

B To encrypt the data

C To format the response

D To log the request time

API keys help the server know who is making the request and if they have permission.

Which of the following is a security risk if an API key is exposed?

A Slower API response

B Unauthorized access to the API

C Incorrect data formatting

D Loss of internet connection

If someone else gets your API key, they can use your API access without permission.

Which method is more secure than API key authentication?

A OAuth

B Plain HTTP

C Basic HTML

D FTP

OAuth provides user identity verification and better security than simple API keys.

What is a good practice for API keys?

A Include them in public URLs

B Post them on social media

C Use simple words like 'password'

D Keep them secret and do not share publicly

API keys should be kept private to prevent unauthorized use.

Explain how API key authentication works and why it is important.

Think about how a secret code lets you enter a club.

Describe best practices to keep API keys secure.

Imagine how you protect your house keys.