Overview

KMS makes it easy to encrypt your data across AWS services by creating and managing encryption keys. Instead of having to worry about the complex details of cryptography, you can focus on using these keys to protect your sensitive information.

The service ensures that your encryption keys are stored securely and are only used by authorized users and applications. It maintains detailed logs of how and when each key is used, helping you meet security and compliance requirements.

One of KMS's key features is automatic key rotation. It can regularly create new versions of your encryption keys while keeping the old versions available to decrypt existing data. This helps maintain security without disrupting your applications.

KMS also provides fine-grained access control, allowing you to specify exactly who can use which keys and for what purposes. You can create different keys for different applications or types of data, and manage them all from a central location.

Example uses

Database Encryption: Protect sensitive data stored in databases by encrypting it with KMS keys.
File Storage: Encrypt files stored in S3 buckets or EBS volumes.
Application Secrets: Protect sensitive application configuration data like API keys and passwords.
Data Export: Ensure data remains encrypted when exported or backed up to other systems.

Integration with other AWS services

KMS integrates deeply with many AWS services:

Amazon S3: Automatically encrypt objects stored in S3 buckets
Amazon RDS: Encrypt databases and their backups
AWS Lambda: Protect environment variables in serverless functions
Amazon EBS: Encrypt virtual machine storage volumes

Think of AWS KMS as your digital security vault, managing all the encryption keys that protect your data while ensuring only authorized users and applications can access them.

AWS Key Management Service (KMS)