A. Use Amazon Made to scan the SNS topics for sensitive data elements in the SNS messages. Create an AWS Lambda function that masks sensitive data inside the messages when Macie records a new finding.
B. Configure an inbound message data protection policy. In the policy, include the De-identify operation to mask the sensitive data inside the messages. Apply the policy to the SNS topics.
C. Configure the SNS topics with an AWS Key Management Service (AWS KMS) customer managed key to encrypt the data elements inside the messages. Grant permissions to all message publisher IAM roles to allow access to the key to encrypt data.
D. Create an Amazon GuardDuty finding for sensitive data that is transmitted to the SNS topics. Create an AWS Security Hub custom remediation action to block messages that contain sensitive data from being delivered to subscribers of the SNS topics.