What is a common method of securing emails?

The common method of securing emails is utilizing encryption protocols like S/MIME (Secure/Multipurpose Internet Mail Extensions). S/MIME provides a framework for public key encryption and digital signatures, which allows for secure email communication. By using S/MIME, messages can be encrypted so that only the intended recipient can read them, and digital signatures can verify the sender's identity, ensuring the integrity and authenticity of the message.

This method addresses the critical need for confidentiality, integrity, and authentication in email communication—essential elements in protecting sensitive information from unauthorized access or tampering. By encrypting emails, even if they are intercepted during transmission, the content remains unreadable to anyone without the appropriate decryption keys.

Other methods, while they may enhance security to some degree, do not offer the same level of protection as encryption. For instance, using personal passwords for each email may help in securing access to individual accounts, but it does not address the security of the email contents during transmission. Changing email servers frequently could potentially enhance security practices but does not directly secure the content or the transmission of emails. Similarly, restricting email attachments may prevent the spread of malware but does not secure the email content itself. Therefore, S/MIME stands out as a robust approach for securing