Certified Information Systems Auditor (CISA) — Question 761

Which of the following would protect the confidentiality of information sent in email messages?

Answer options

• A. Encryption
• B. Secure Hash Algorithm 1 (SHA-1)
• C. Digital certificates
• D. Digital signatures

Correct answer: A

Explanation

Encryption is the correct answer because it transforms information into a secure format that prevents unauthorized access. The other options, such as SHA-1, digital certificates, and digital signatures, are related to data integrity and authentication but do not specifically protect the confidentiality of information in transit.