Amazon Simple Notification Service (SNS) offers a managed pub/sub messaging service.
See 
Amazon Simple Notification Service (SNS) Developer Guide for general guidance using SNS.
API Access
The ISNSClient interface and it's implementation TSNSClient provides access to all SNS operations.
Receiving Messages
When receiving messages to endpoints such as HTTP, a class for verifying the authenticity of messages is provided in TSNSMessageVerifier.
