Istio’s Security Policies, comprising PeerAuthentication, RequestAuthentication, and AuthorizationPolicy objects, fortify the security of microservices in a service mesh environment. PeerAuthentication enforces mutual TLS authentication, while RequestAuthentication enables fine-grained control over incoming request authentication, supporting mechanisms like JWT validation and API key authentication. The AuthorizationPolicy object facilitates granular access control, empowering administrators to define rules based on source, destination, headers, and payload attributes. Discover how Istio’s Security Policies enhance security, prevent unauthorized access, and establish secure communication within your service mesh architecture.