-title'>Concepts</h5></li><script type="text/javascript"> var docs = []; docs.push({path: [ "index.md", ], url: "/docs/concepts/index.html", title: "Concepts", order: 10, overview: "Concepts help you learn about the different parts of the Istio system and the abstractions it uses."}); docs.push({path: [ "network-and-auth", "auth.md", ], url: "/docs/concepts/network-and-auth/auth.html", title: "Auth", order: 10, overview: "Architectural deep-dive into the design of Auth, which provides the secure communicati