← Microservices learning pathMicroservices · Module 9 of 10
Security in microservices
Secure service-to-service and user access.
📖 Key ideas
- Authenticate users at the gateway (OAuth 2.0 / OIDC, JWT).
- Services verify tokens and check permissions.
- Service-to-service auth with mTLS or signed tokens.
- Secrets in a vault, not in code or images.
- Least privilege and network policies between services.
💡 Real-life example: Microservice security is a gated campus where every building also checks your badge.
OIDCOpenID Connect identity layer
JWTSigned token with claims
Zero trustVerify every request
Secrets vaultSecure secret storage