Explanation: The AWS Key Management Service (AWS KMS) is a managed service that makes it easy for you tocreate and control the encryption keys used to encrypt your data. AWS KMS is integrated with otherAWS services including Amazon EBS, Amazon S3, Amazon Redshift, Elastic Transcoder, AmazonWorkMail, and Amazon RDS to make it simple to encrypt your data with encryption keys that youmanage. AWS KMS is also integrated with AWS CloudTrail to provide you with key usage logs to helpmeet your regulatory and compliance needs. AWS KMS currently supports only symmetric (private)key cryptography. http://docs.aws.amazon.com/kms/latest/developerguide/crypto-intro.html