API Gateway Authorization vs Service Level Permissions
Gateways can reject invalid identity credentials but cannot reliably decide every downstream business permission. Reliable applications must preserve explicit...
Category
Cybersecurity/Networking
JWT Key Rotation With JWKS Caching in Microservices
Caching public signing keys improves verification efficiency but may delay adoption of rotated keys. Reliable applications must preserve explicit correctness...
TLS Certificate Rotation Without Downtime for Internal Services
Internal TLS certificates expire and must be renewed before services lose trust. Begin with the exact user problem and the guarantees the system must preserve....
OIDC ID Tokens vs OAuth Access Tokens for Backend APIs
An OIDC ID token describes an authentication event for a client, while an OAuth access token conveys authorization to a resource server. Begin with the exact...
DNS TTL and Negative Caching for Service Reliability
DNS caching influences how quickly clients observe address changes; negative caching can prolong recovery after failed lookups. Begin with requirements and the...
OAuth Token Audience Validation Between Microservices
Audience validation stops a token meant for one service from being accepted as authorization by an unrelated service. Begin with requirements and the workload....
Zero Trust Service Authentication vs Network Perimeter Trust
Network placement does not establish workload identity; authenticate and authorize service calls at each meaningful trust boundary. A production decision must...
How to Design Secure Logout Across Multiple Devices
Direct answer: Clearing one browser cookie does not revoke every active device session. This design decision should be evaluated through explicit guarantees...
Content Security Policy Nonces vs Hashes for Frontend Scripts
Direct answer: CSP nonces allow approved script execution using unpredictable response-specific values. This design decision should be evaluated through...