DynamoDB - Encryption In Transit

DynamoDB supports both TLS 1.2 and 1.3. You can test it using the below curl command:

curl https://dynamodb.us-east-1.amazonaws.com \
  -X POST \
  -H "Content-Type: application/x-amz-json-1.0" \
  -H "X-Amz-Target: DynamoDB_20120810.ListTables" \
  -d '{}' \
  -v

And look for a line similar to SSL connection using TLSv1.3