Zero-Trust Service Identity with SPIFFE in Kubernetes

IP-based trust is fragile in dynamic orchestration platforms. Identity has to be workload-scoped and cryptographically verifiable.

Rollout Phases

1. Authenticate only.
2. Authorize in shadow mode.
3. Enforce least-privilege policies.

principal: spiffe://prod/ns/payments/sa/api
allow:
  - method: ChargeCard

Shadow mode is where policy quality is built.