API key management in Microservices - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the primary purpose of API key management in microservices?

API key management controls and secures access to microservices by issuing, validating, and revoking unique keys for clients.

intermediate

Name two common methods to store API keys securely.

API keys can be stored securely using encrypted databases or dedicated secrets management services like HashiCorp Vault or AWS Secrets Manager.

intermediate

Why is it important to rotate API keys regularly?

Regular rotation limits the risk of compromised keys being used maliciously and helps maintain security hygiene.

beginner

What role does rate limiting play in API key management?

Rate limiting restricts how often a client can use an API key, preventing abuse and protecting system resources.

advanced

Explain the difference between API key authentication and OAuth.

API key authentication uses a simple key to identify clients, while OAuth provides delegated access with tokens and scopes for finer control.

What is the first step in API key management?

A Encrypting the API key

B Logging API key usage

C Revoking the API key

D Issuing a unique API key to a client

The first step is to issue a unique API key to identify and authenticate the client.

Which of the following is NOT a best practice for API key management?

A Using HTTPS to transmit keys

B Storing keys in plaintext files

C Rotating keys regularly

D Limiting key permissions

Storing keys in plaintext files is insecure and should be avoided.

How does rate limiting help in API key management?

A It encrypts the API key

B It stores API keys securely

C It restricts the number of requests per key

D It generates new API keys automatically

Rate limiting restricts how many requests a client can make using their API key to prevent abuse.

What is a common way to revoke an API key?

A Delete the key from the database

B Encrypt the key

C Send a notification email

D Increase the key's permissions

Revoking usually involves deleting or disabling the key in the system to prevent further use.

Which system is designed specifically for managing secrets like API keys?

A HashiCorp Vault

B MySQL

C Redis

D Nginx

HashiCorp Vault is a dedicated secrets management tool for securely storing API keys and other sensitive data.

Describe the key components and workflow of API key management in a microservices environment.

Think about how a client gets a key, how the system checks it, and how keys are kept safe or disabled.

Explain why API key management is critical for security and scalability in microservices.

Consider what could happen without proper key management and how it helps keep the system safe and efficient.