---
title: Securing Istio Service Mesh
description: 'cert-manager usage: Istio and istio-csr'
---

cert-manager can be integrated with [Istio](https://istio.io) using the project
[istio-csr](https://github.com/cert-manager/istio-csr). The istio-csr will
deploy an agent that is responsible for receiving certificate signing requests
for all members of the Istio mesh, and signing them through cert-manager.

[istio-csr](https://github.com/cert-manager/istio-csr) will sign all
control plane and workload certificates via your chosen cert-manager Issuer.