# Amazon Key Management Service Documentation

Amazon Key Management Service (Amazon KMS) is an encryption and key management service scaled for the cloud. Amazon KMS keys and functionality are used by other Amazon services, and you can use them to protect data in your own applications that use Amazon.

- [Developer Guide](/en_us/kms/latest/developerguide/): Provides conceptual overviews of Amazon Key Management Service and explains how to use it to protect data in your own applications that use Amazon.
- [API Reference](/en_us/kms/latest/APIReference/): Describes in detail the API operations for Amazon Key Management Service. Also provides sample requests, responses, and errors for the supported web services protocols.

---