AWS KMS: How many keys do I need?

This AWS Security Blog article provides comprehensive guidance on determining the number of AWS Key Management Service (KMS) keys an organization needs, offering a strategic approach to encryption key management.

• Four key guiding principles for KMS key strategy:
  • Data Classification
  • Application-based Key Management
  • AWS Service Considerations
  • Separation of Duties
• Recommended approaches include:
  • Decentralized key management for most organizations
  • Centralized approach for strict compliance environments
  • Hybrid models blending central and team-level management
• Key considerations include:
  • Different key types (AWS owned, managed, customer-managed)
  • Cost implications
  • Manageability
  • Specific regulatory requirements

The article emphasizes that key management is an ongoing process requiring regular review and adaptation to organizational needs and evolving security landscapes.