Certified Information Security Manager (CISM) — Question 808

Which of the following will ensure confidentiality of content when accessing an email system over the Internet?

Answer options

• A. Digital encryption
• B. Multi-factor authentication
• C. Digital signatures
• D. Data masking

Correct answer: A

Explanation

Digital encryption is the only option that specifically protects the content of data by converting it into a format that cannot be easily understood by unauthorized users. Multi-factor authentication enhances security but does not encrypt content, while digital signatures verify authenticity without ensuring confidentiality. Data masking obscures data but does not encrypt it, leaving it vulnerable to interception.