SNS

• Pub/sub pattern
• Can have as many receveivers.
• Up to 12,500,000 subscriptions per topics
• 100,000 topics limit

Topic Publish vs Direct Publish

• Topic Publish (SDK)
  • Create topic
  • Create subscription(s)
  • Publish topic
• Direct Publish
  • Create platform application
  • Create platform endpoint
  • Publish to platform endpoint
  • Works with Google GCM, Apple APNS, Amazon ADM

Security

• Encryption
  • HTTPS in-flight encryption
  • KMS keys encryption at rest
  • Client-side encryptions
• Access controls:
  • IAM
• SNS Access Policies
  • Useful for cross-account access
  • Allow other services to write into your SNS topic