Certified Information Systems Auditor (CISA) — Question 201

Which of the following is the MOST appropriate control to ensure integrity of online orders?

Answer options

• A. Public key encryption
• B. Digital signature
• C. Data Encryption Standard (DES)
• D. Multi-factor authentication

Correct answer: B

Explanation

A digital signature provides a way to verify the authenticity and integrity of a message or document, making it the most suitable option for ensuring that online orders are not altered in transit. Public key encryption, DES, and multi-factor authentication serve different purposes such as confidentiality and user verification but do not specifically address integrity.