Final answer:
To combat spear phishing, the sender's identity in an email can be verified using DMARC in conjunction with SPF and DKIM. These security technologies help prevent identity theft and scams, which is essential for individuals during activities like job searches.
Step-by-step explanation:
To verify the identity of the sender in an email and protect against spear phishing attacks, a security device called Domain-based Message Authentication, Reporting, and Conformance (DMARC) is used in conjunction with two other technologies: Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM). SPF allows the email domain's owner to specify which email servers are allowed to send email on behalf of the domain. DKIM provides a way for the sender to sign a message with a digital signature, which the recipient can then verify using the sender's public key published in DNS. DMARC utilizes both SPF and DKIM to ensure that legitimate email is properly authenticated and that fraudulent activity is blocked.
These security measures are crucial for individuals to avoid getting scammed and for organizations to increase security. They help prevent unauthorized parties from impersonating trusted entities via email. This is especially important since individuals seeking employment or conducting job searches are often communicating with unknown parties and could be vulnerable to identity theft and scams. Using a professional email address with your name can also contribute to the security and credibility of your communications.