How to Implement Data Encryption
Add encryption at rest and in transit to protect sensitive data throughout your application stack.
What You'll Learn
This intermediate-level guide walks you through how to implement data encryption step by step. Estimated time: 12 min.
Step 1: Classify your data
Identify which data requires encryption — PII, financial data, health records, credentials, and any regulated information.
Step 2: Implement encryption at rest
Enable database encryption, encrypt file storage, and use application-level encryption for highly sensitive fields.
Step 3: Configure encryption in transit
Enforce TLS 1.2+ for all connections, configure proper cipher suites, and implement certificate pinning for mobile apps.
Step 4: Manage encryption keys
Use AWS KMS, Google Cloud KMS, or HashiCorp Vault for key management with proper rotation and access policies.
Step 5: Implement application-level encryption
Add field-level encryption for sensitive data like SSNs, payment details, and health records using envelope encryption.
Frequently Asked Questions
What encryption algorithm should I use?▾
AES-256-GCM for symmetric encryption, RSA-2048 or ECDSA for asymmetric. Use your cloud providers KMS rather than implementing cryptography yourself.
Should I encrypt everything?▾
Encrypt all data at rest and in transit by default. Add application-level encryption for data that needs extra protection — PII, financial data, and credentials.
How do I handle encryption key rotation?▾
Use envelope encryption where data encryption keys are wrapped by key encryption keys. Rotate KEKs regularly — the wrapped DEKs are automatically re-encrypted.