Security

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowSendToOrderQueue",
      "Effect": "Allow",
      "Action": [
        "sqs:SendMessage",
        "sqs:GetQueueAttributes",
        "sqs:GetQueueUrl"
      ],
      "Resource": "arn:aws:sqs:ap-east-1:123456789012:prod-platform-checkout-order-payment-capture"
    }
  ]
}

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowConsumeOrderQueue",
      "Effect": "Allow",
      "Action": [
        "sqs:ReceiveMessage",
        "sqs:DeleteMessage",
        "sqs:ChangeMessageVisibility",
        "sqs:GetQueueAttributes",
        "sqs:GetQueueUrl"
      ],
      "Resource": "arn:aws:sqs:ap-east-1:123456789012:prod-platform-checkout-order-payment-capture"
    }
  ]
}

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowSnsTopicPublish",
      "Effect": "Allow",
      "Principal": {
        "Service": "sns.amazonaws.com"
      },
      "Action": "sqs:SendMessage",
      "Resource": "arn:aws:sqs:ap-east-1:123456789012:prod-platform-checkout-order-payment-capture",
      "Condition": {
        "ArnEquals": {
          "aws:SourceArn": "arn:aws:sns:ap-east-1:123456789012:prod-platform-checkout-order-events"
        }
      }
    }
  ]
}

SSE-SQS:
    AWS managed encryption for SQS
    simple default for most queues

SSE-KMS:
    use customer managed KMS key
    better key policy / audit / rotation control
    producers and consumers need KMS permissions

important:
    encrypted queues require HTTPS and SigV4
    SSE encrypts message body
    queue metadata, message metadata, and metrics are not encrypted by SQS SSE

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowSqsKmsUsage",
      "Effect": "Allow",
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "arn:aws:kms:ap-east-1:123456789012:key/11111111-2222-3333-4444-555555555555"
    }
  ]
}