Tina is worried about employees in her organization sending emails containing sensitive information, such as customer Social Security numbers (SSNs). What kind of solution can she introduce to mitigate the risk of unintentional data leaks of this nature?

DLP (Data Loss Prevention) tools enable tagging and monitoring of sensitive data to alert users if they attempt to send it. Administrators are also informed, and if necessary, the data can be encrypted or protected using other methods before it is sent. Full-disk encryption (FDE) safeguards data while it is at rest, while S/MIME and POP3S secure mail being retrieved from a server. However, they would not prevent SSNs from being sent.