Amazon Offer Encryption of DynamoDB

AWS Promoting Encryption in 2017 with the quote of "Encrypt Like Everyone Is"

Amazon offers Table Encryption on DynamoDB which can be done easily to encrypt data with AES-256 and a service default AWS Key Management Service (KMS). This feature will allow developers to handle more sensitive data faster and easier in different workloads. For the moment this service is only available to the users in US East (N. Virginia, Ohio) US West (Oregon) and EU (Ireland). Earlier in 2017 AWS launched encryption for SQS and EFS in addition to Encryption options for S3 and server side encryption of Kinesis Data Streams in AWS.

Source - Amazon