Certified Information Security Manager (CISM) — Question 889

An email digital signature will:

Answer options

• A. automatically correct unauthorized modification of an email message.
• B. verify to recipients the integrity of an email message.
• C. protect the confidentiality of an email message.
• D. prevent unauthorized modification of an email message.

Correct answer: B

Explanation

The correct answer is B because a digital signature confirms the integrity of the email by allowing recipients to verify that the message has not been altered. Options A and D incorrectly suggest that the signature can correct or prevent modifications, which is not the case; it only verifies the integrity after the fact. Option C is incorrect as digital signatures do not provide confidentiality; that is handled by encryption.