 more. Authentication and authorization policies can be applied in a streamlined way in all environments — including frontend and backend applications — all without code changes or redeploys.</p><h2 id=understanding-istio-and-the-adapter>Understanding Istio and the adapter</h2><p><a href=/v1.5/pt-br/docs/concepts/what-is-istio/>Istio</a> is an open source service mesh that
transparently layers onto distributed applications and seamlessly integrates
with Kubernetes. To reduce the complexity of deployment