Proxy Architecture is a design pattern where an intermediary server (proxy) sits between clients and upstream services, adding security controls, monitoring, and abstraction.
Proxy Architecture
Proxy Architecture is a design pattern where an intermediary server (proxy) sits between clients and upstream services, adding security controls, monitoring, and abstraction.
Why It Matters
Proxy-based security is fundamentally different from vault-based security. A vault stores secrets — a proxy intercepts traffic and controls access. For API key management, the proxy model enables instant revocation without key rotation, which vaults cannot provide.
How It Works
The client sends requests to the proxy instead of directly to the upstream API. The proxy authenticates the client (via Shield Token), decrypts the real API key, forwards the request, and returns the response. All without the client ever seeing the real key.
Best Practices
- Minimize proxy latency with efficient architecture
- Implement circuit breakers for upstream failures
- Log all proxied requests for audit and anomaly detection
- Ensure the proxy is highly available (it's in the critical path)
Common Mistakes
- Adding too much processing to the proxy path
- Not planning for proxy unavailability
- Caching decrypted keys in the proxy (security risk)
How ShieldKey Helps
ShieldKey is built on proxy architecture. Your API keys are encrypted at rest and only decrypted in-memory during proxied requests. Team members never see real keys — they use revocable Shield Tokens.
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Why use a proxy instead of a vault?
A vault stores secrets but still requires sharing them. A proxy never exposes the secret — team members use proxy tokens while the real key stays encrypted. Only a proxy enables instant revocation without key rotation.