Amazon DynamoDB is NoSQL DB, which is very fast and scalable. It provides your application very low latency at any scale. DynamoDB is PaaS (available on AWS), which works on document and key value stores. For huge amounts of requests, AWS offers the DynamoDB Accelerator (DAX) service to give you microsecond latency.
To secure DynamoDB, we use IAM extensively. Let's look at methods of securing DynamoDB.