A security administrator wants to allow external organizations to cryptographically validate the company's domain name in email messages sent by employees.
Which of the following should the security administrator implement?
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A. B. C. D.D.
https://en.wikipedia.org/wiki/DMARCThe security administrator should implement DKIM (DomainKeys Identified Mail) to allow external organizations to cryptographically validate the company's domain name in email messages sent by employees.
DKIM is an email authentication method designed to detect email spoofing by providing a mechanism for verifying the authenticity of email messages. DKIM uses public-key cryptography to allow email receivers to check that an email message was indeed sent and authorized by the owner of the domain name that appears in the "From" field of the email header.
When an email is sent using DKIM, the sender's email server adds a digital signature to the email message header using a private key that only the domain owner has access to. The receiving email server can then use the corresponding public key published in the sender's DNS (Domain Name System) record to verify the digital signature and confirm that the email message was indeed sent by the domain owner.
SPF (Sender Policy Framework) is another email authentication method that allows the domain owner to specify which email servers are authorized to send email messages for their domain. SPF can help prevent email spoofing, but it does not provide cryptographic validation of the domain name in the email message header.
S/MIME (Secure/Multipurpose Internet Mail Extensions) is an email encryption and digital signing standard that allows users to send and receive email messages with enhanced security features. However, S/MIME does not provide domain name validation for email messages.
TLS (Transport Layer Security) is a protocol used to secure email communication between email servers. While TLS can help prevent eavesdropping and tampering with email messages in transit, it does not provide domain name validation for email messages.