hat are not encrypted.</p><h2 id=before-you-begin>Before you begin</h2><ul><li><p>Setup Istio by following the instructions in the <a href=/v1.5/docs/setup/>Installation guide</a>.</p></li><li><p>Start the <a href=https://github.com/istio/istio/tree/release-1.5/samples/sleep>sleep</a> sample which will be used as a test source for external calls.</p><p>If you have enabled <a href=/v1.5/docs/setup/additional-setup/sidecar-injection/#automatic-sidecar-injection>automatic sidecar injection</a>, deploy the <cod