Implementing key rotation in a hybrid cloud environment involves systematically updating cryptographic keys (e.g., encryption keys, API keys, or credentials) across on-premises and cloud infrastructure to maintain security. Here’s how to do it:
1. Centralized Key Management
Use a centralized key management service (KMS) that can manage keys across both on-premises and cloud environments. This ensures consistent rotation policies.
- Example: A hybrid setup with on-premises databases and cloud-based storage (e.g., Tencent Cloud KMS for managing keys across both).
2. Automated Rotation Policies
Define rotation schedules (e.g., monthly, quarterly) based on key sensitivity. Automate the process to minimize manual errors.
- Example: Rotate database encryption keys every 30 days using Tencent Cloud KMS’s automatic key rotation feature, while syncing with on-premises systems via APIs.
3. Hybrid Cloud Integration
- On-Premises: Use tools like HashiCorp Vault or Tencent Cloud KMS Agent to rotate keys locally.
- Cloud: Leverage native KMS (e.g., Tencent Cloud KMS) for cloud services (e.g., COS, TDSQL).
- Example: Rotate API keys for a hybrid app where the frontend is in the cloud (Tencent Cloud API Gateway) and the backend runs on-premises.
4. Key Versioning & Backward Compatibility
Maintain old key versions temporarily to ensure decryption of existing data while new keys are in use.
- Example: Tencent Cloud KMS supports key versioning, allowing seamless transitions.
5. Monitoring & Auditing
Track key rotation events for compliance.
- Example: Use Tencent Cloud CloudAudit to log key changes across hybrid environments.
6. Zero-Downtime Rotation
Rotate keys without disrupting services by:
- Using dual-key encryption (old + new) during transition.
- Example: Tencent Cloud KMS enables smooth key swaps for databases and storage.
By combining centralized KMS (like Tencent Cloud KMS), automation, and hybrid integration, you ensure secure and efficient key rotation.