Securing Microservices

Explain the OAuth 2.0 framework, including roles (Resource Owner, Client, etc.) and common grant types.

Set up a Spring Authorization Server and register an OAuth2 client with support for the authorization_code grant type.

Secure a microservice by configuring it as a Resource Server to validate JWT access tokens.

Implement JWT token validation at the API Gateway for centralized authentication.

Compare different strategies for inter-service authentication (e.g., service-to-service JWTs, mTLS).

Describe strategies for secrets management in a microservices environment (e.g., HashiCorp Vault, cloud provider KMS).

Implement symmetric encryption for sensitive properties in a configuration repository and configure clients for decryption.

Explain the role of mutual TLS (mTLS) in securing service-to-service communication.