Apply zero-trust principles to a new service-to-service API integration.
Service access A recommendations service needs purchase-history data. The team proposes a namespace allow rule because both services run in the same cluster. The cluster is infrastructure, not proof of intent or least privilege. Zero trust move Identity -> Policy -> Signal Zero trust removes default trust from network location and replaces it with explicit, contextual, monitored access decisions. Trust zone Anything in this namespace can talk. The service can move fast without inheriting broad invisible trust. Do not let network placement answer an authorization question. 01 Identity 02 Policy 03 Signal Caller identity Authentication
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