# Security Hardening

## Device Security

### TPM Integration

```yaml
apiVersion: v1
kind: Secret
metadata:
  name: tpm-credentials
  namespace: edge-security
type: Opaque
stringData:
  tpm.conf: |
    {
      "endorsement_hierarchy_pwd": "${TPM_ENDORSEMENT_PWD}",
      "owner_hierarchy_pwd": "${TPM_OWNER_PWD}",
      "lockout_auth": "${TPM_LOCKOUT_AUTH}"
    }
```

## Network Security

### Zero Trust Implementation

```hcl
resource "aws_networkfirewall_rule_group" "edge_security" {
  capacity = 100
  name     = "edge-security-rules"
  type     = "STATEFUL"
  
  rule_group {
    rules_source {
      stateful_rule {
        action = "DROP"
        header {
          destination      = "ANY"
          destination_port = "ANY"
          protocol        = "TCP"
          source          = "ANY"
          source_port     = "ANY"
        }
        rule_option {
          keyword = "sid:1"
        }
      }
    }
  }

  tags = {
    Environment = "production"
    Security    = "high"
  }
}
```

## Data Protection

### Encryption Configuration

```yaml
apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
  name: edge-secrets
spec:
  provider: azure
  parameters:
    usePodIdentity: "true"
    keyvaultName: edge-keyvault
    objects: |
      array:
        - |
          objectName: edge-encryption-key
          objectType: secret
        - |
          objectName: edge-signing-cert
          objectType: cert
  secretObjects:
    - data:
      - key: encryption-key
        objectName: edge-encryption-key
      secretName: edge-secrets
      type: Opaque
```

## Compliance Controls

### Audit Logging

```yaml
apiVersion: audit.k8s.io/v1
kind: Policy
metadata:
  name: edge-audit-policy
rules:
- level: RequestResponse
  resources:
  - group: ""
    resources: ["secrets", "configmaps"]
- level: Metadata
  resources:
  - group: "apps"
    resources: ["deployments", "daemonsets"]
  - group: "autoscaling"
    resources: ["horizontalpodautoscalers"]
```

## Best Practices

1. **Edge Device Security**
   * Secure boot
   * TPM attestation
   * Firmware updates
   * Hardware security
2. **Network Protection**
   * Microsegmentation
   * Traffic encryption
   * Access control
   * Anomaly detection
3. **Data Security**
   * Encryption at rest
   * Encryption in transit
   * Key rotation
   * Access auditing
4. **Compliance Management**
   * Audit trails
   * Policy enforcement
   * Evidence collection
   * Regular assessment
