How does JWT authentication fit into a zero trust cloud infrastructure?

All answers to this question.

Integrating JWT authentication into a Zero Trust framework requires treating every microservice as an independent security perimeter. Instead of trusting a global token implicitly, each service must independently validate the signature, issuer, and audience fields. You should utilize an internal public key infrastructure, where an identity provider issues short-lived tokens. Services pull the latest public keys via a secure JWKS endpoint, ensuring that compromised service identities can be isolated immediately without system-wide downtime.

   Answered 2025-07-14 by Pamela Boyd

Are you recommending that every microservice perform an external HTTP call to fetch the JWKS keys on every API request? Wouldn't that create a severe network bottleneck and introduce massive latency across our cloud infrastructure?

   Answered 2025-08-22 by Arthur Howell

• Arthur, you do not fetch the keys on every single API request. Instead, the microservices cache the JWKS public keys locally in memory and use the standard HTTP cache-control headers. They only fetch new keys if a token contains a key ID that isn't found in the current local cache.

     Commented 2025-08-30 by Lawrence Rice

For inter-service communication under Zero Trust, combining JWT authentication with mutual TLS gives you optimal network transport encryption and identity verification.

   Answered 2025-10-11 by Teresa Weaver

• Exactly, Teresa. Mutual TLS handles the transport layer security and machine identity, while the token handles the actual end-user context, creating an airtight defense-in-depth security structure.

     Commented 2025-10-18 by Keith Wagner