Amazon ElastiCache for Redis now supports encryption in-transit and at-rest for secure internode communications to help keep personally identifiable information (PII) safe. The new encryption in-transit feature enables you to encrypt all communications between clients and Redis server as well as between the Redis servers (primary and read replica nodes). The encryption at-rest feature allows you to encrypt your backups on disk and in Amazon S3. Additionally, you can use the Redis AUTH command for an added level of authentication.