What is a protective measure for emails containing classified information?

Using secure email systems and encryption is a protective measure for emails containing classified information because it ensures that the content is safeguarded against unauthorized access. Secure email systems provide enhanced security features specifically designed to handle sensitive or classified information. Encryption transforms the email's content into a format that cannot be easily read by anyone other than the intended recipient, thus maintaining confidentiality and integrity.

In environments where classified information is handled, it is critical to use methods that protect against interception and unauthorized access. Secure email systems often include additional features, such as secure authentication processes, that further bolster security. Employing these measures helps comply with regulations regarding the handling of classified data, reducing the risk of unauthorized disclosure, which could potentially compromise national security or confidentiality agreements.