1. RBAC and Authentication:

   • Implement Role-Based Access Control (RBAC) to limit user access.

2. Pod Security:

   • Use Network Policies to restrict Pod communication.

   • Enable PodSecurity Standards or Pod Security Admission controllers.

3. Encrypt Secrets:

   • Securely manage sensitive data using Kubernetes Secrets with encryption at rest.

Example Network Policy:

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: restrict-access
  namespace: default
spec:
  podSelector:
    matchLabels:
      role: backend
  policyTypes:
  - Ingress
  ingress:
  - from:
    - podSelector:
        matchLabels:
          role: frontend