Which of the following provides the BEST mechanism to achieve this goal?

A systems administrator needs to configure an email client to ensure data integrity of the email messages.

Which of the following provides the BEST mechanism to achieve this goal?
A . Cyclic redundancy check
B . SHA-1 hashes
C . SHA-256 hashes
D . Digital signature

View Answer

Answer: D

Explanation:

A digital signature is a type of cryptographic technique that verifies the authenticity, integrity, and non-repudiation of an electronic message or document. A digital signature can help configure an email client to ensure data integrity of the email messages, as it can prove that the email message has not been altered or tampered with during transmission by using a mathematical algorithm to generate a unique code (signature) based on the content and identity of the sender. A digital signature can also help prevent spoofing, phishing, or impersonation attacks, as it can confirm that the email message originates from a legitimate source.

Reference: CompTIA Cloud+ Certification Exam Objectives, page 14, section 2.7

Reference: https://www.fsl.cs.sunysb.edu/docs/integrity-storagess05/integrity.html