Which of the following is a secure method for encrypting emails to protect the content from unauthorized access?
S/MIME
The requirement is to encrypt the actual content of an email message so that only the intended recipient, holding the right key, can read it.
S/MIME (Secure/Multipurpose Internet Mail Extensions) is designed for this: it uses public-key cryptography to encrypt the message body and to digitally sign it, proving the sender's identity and protecting the content.
Because the message itself is encrypted, its body stays protected both while in transit and while stored in the mailbox, giving end-to-end content protection.
So the secure method for encrypting emails is S/MIME.
IMAP is a protocol for retrieving and organising mail on a server, and SMTP is a protocol for sending mail between servers; neither encrypts the message content.
SSL (or TLS) secures the transport channel between client and server, but once the mail is delivered and stored the message itself is not encrypted, so it does not provide the content-level email encryption that S/MIME does.
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Important Questions from Network Security
A ________ is a system designed to prevent unauthorized access to or from a private network.
______ changes each time it is installed to avoid detection by antivirus software.
What is a key security advantage of deploying a DMZ (Demilitarized Zone) using two separate firewalls, rather than a single firewall setup?
Which one of the following is usually used in the process of Wi-fi hacking?
Which of the following is an attack in which the user receives the unwanted amount of e-mails?
