SSM Parameter Store
- Secure storage for configuration and secrets.
 
- Version tracking.
 
- Security through IAM.
 
- Optional encryption using KMS.
 
Parameters Policies
- Allow to assign a TTL to a parameter.
 
- Can assign multiple policies at a time.
 
AWS Secrets Manager
- Meant for storing secrets.
 
- Can force rotation of secrets every X days.
 
- Automate generation on rotation using Lambda.
 
- Integration with Amazon RDS (MySQL, PostgreSQL, Aurora)
 
- Secrets encrypted using KMS.
 
- Mostly for RDS integration.
 
Multi-Region Secrets
- Replication secrets across multiple AWS regions.