1. Log in to your AWS console.
2. Go to the SNS service.
3. Select the SNS topic that you want to encrypt.
4. In the topic details page, click on the “Edit” button.
5. Scroll down to the “Encryption” section.
6. Select the “Enable encryption” option.
7. Choose the KMS key that you want to use for encryption. If you don’t have a KMS key, you can create one by clicking on the “Create a new KMS key” button.
8. Click on the “Update” button to save the changes.
9. Verify that the SNS topic is now encrypted by checking the “Encryption” section in the topic details page.

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1. Open the AWS CLI on your local machine.
2. Run the following command to list all the SNS topics in your AWS account:
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   Ask AI

   aws sns list-topics
   

3. Identify the SNS topic that needs to be encrypted.
4. Run the following command to enable server-side encryption for the identified SNS topic:
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   Ask AI

   aws sns set-topic-attributes --topic-arn <topic-arn> --attribute-name KmsMasterKeyId --attribute-value <kms-key-id>
   

   Replace <topic-arn> with the ARN of the SNS topic and <kms-key-id> with the ID of the KMS key that you want to use for encryption.
5. Verify that the encryption is enabled for the SNS topic by running the following command:
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   Ask AI

   aws sns get-topic-attributes --topic-arn <topic-arn>
   

   This command should return the attributes of the SNS topic, including the KmsMasterKeyId attribute with the value set to the KMS key ID that you specified.
6. Repeat the above steps for any other SNS topics that need to be encrypted.
7. Once you have confirmed that all SNS topics are encrypted, you can close the AWS CLI.

1. Open the AWS Management Console and navigate to the SNS service.
2. Identify the SNS topic that needs to be encrypted.
3. In the topic settings, click on the “Encryption” tab.
4. Select the “Enable encryption” option.
5. Choose the KMS key that you want to use for encryption.
6. Click on the “Update” button to save the changes.
7. To ensure that all future SNS topics are encrypted by default, you can set up a CloudFormation stack with the following code:

Resources:
  SNSDefaultEncryption:
    Type: "AWS::SNS::Topic"
    Properties:
      KmsMasterKeyId: <your_kms_key_id>
      DisplayName: "Default Encrypted Topic"
      TopicName: "default-encrypted-topic"
      Subscription:
        - Protocol: "email"
          Endpoint: "your-email@example.com"

8. Deploy the CloudFormation stack to your AWS account.
9. Verify that the SNS topic is now encrypted by checking the “Encryption” tab in the topic settings.