mirror of https://github.com/istio/istio.io.git
12 lines
511 B
Markdown
12 lines
511 B
Markdown
---
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title: Workload Instance Principal
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test: n/a
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---
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The verifiable authority under which a [workload instance](/docs/reference/glossary/#workload-instance) runs.
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Istio's service-to-service authentication is used to produce the workload principal.
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By default workload principals are compliant with the SPIFFE ID format.
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Workload instance principals are available in policy and telemetry configuration
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using the `source.principal` and `destination.principal` [attributes](/docs/reference/glossary/#attribute).
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