Encryption in Transit Implementation
Data in transit is vulnerable to interception, man-in-the-middle attacks, and eavesdropping. We implement encryption for every network path in your infrastructure — TLS 1.3 for external traffic, mTLS for service-to-service, and VPN or PrivateLink for internal communication.
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TLS Configuration
We configure TLS 1.3 (with TLS 1.2 fallback where required) on all external-facing endpoints: ALB/NLB listeners, API gateways, CDN origins, and direct application endpoints. TLS policies enforce strong cipher suites and disable weak protocols. HSTS headers prevent protocol downgrade attacks. Certificate pinning is implemented for mobile applications. We verify configuration with SSL Labs, achieving A+ ratings, and set up monitoring for certificate expiration and protocol compliance.
Certificate Management
Certificates are managed through ACM (AWS Certificate Manager) for ALB/CloudFront or cert-manager for Kubernetes. Automated renewal eliminates certificate expiration incidents. For internal services, we deploy a private CA (ACM PCA or Vault PKI) with automated certificate issuance and rotation. Certificate lifecycle is fully automated — no manual renewal, no expired certificates, no production outages from certificate issues. Monitoring alerts fire 30 days before any certificate expiration.
Mutual TLS for Service-to-Service
Internal service-to-service communication uses mutual TLS (mTLS) — both client and server authenticate with certificates. We implement mTLS through a service mesh (Istio, Linkerd) or direct application configuration. mTLS ensures that only authorized services can communicate with each other, preventing lateral movement if an attacker compromises a single service. Certificate rotation is handled automatically by the mesh with zero-downtime rollover.
Internal Network Encryption
Even within your VPC, we encrypt internal traffic. Database connections use SSL (enforced via parameter groups: rds.force_ssl = 1). Redis connections use TLS (ElastiCache in-transit encryption). S3 bucket policies require aws:SecureTransport. VPC peering and cross-region traffic uses encrypted channels. For sensitive workloads, AWS PrivateLink eliminates internet exposure entirely. The goal: zero plaintext data on any network segment, internal or external.
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