Designing high-availability Auth Servers requires stateless validation and asynchronous session distribution:

1. **Asymmetric Signatures (RS256/ES256)**: Allows resource servers to validate tokens locally without contacting the Auth Server cluster.
2. **Stateless Node Scaling**: Authorization server nodes store session/refresh state in a distributed memory cluster (e.g., Redis Cluster across multiple Availability Zones).
3. **Public Key Caching**: Resource servers cache JWKS public key definitions locally to survive temporary Auth Server outages.

Q45: How do you design an Authorization Server for High Availability and Horizontal Scale?

Q46: Compare JWT Signing Algorithms: HS256, RS256, ES256, and EdDSA.

Q44: What performance bottlenecks can arise from bloated JWT payloads and how do you mitigate them?

Comprehensive technical interview bank covering token-based security, protocol grant flows, cryptographic signatures, session management, and enterprise API security.

50 Essential Interview Questions: JWT, OAuth 2.0, OIDC, and API Security

Q45: How do you design an Authorization Server for High Availability and Horizontal Scale? - 50 Essential Interview Questions: JWT, OAuth 2.0, OIDC, and API Security

Q45: How do you design an Authorization Server for High Availability and Horizontal Scale?

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