Certified Ethical Hacker (CEH v11) — Question 32

Alice needs to send a confidential document to her coworker, Bryan. Their company has public key infrastructure set up. Therefore, Alice both encrypts the message and digitally signs it. Alice uses _______________ to encrypt the message, and Bryan uses _______________ to confirm the digital signature.

Answer options

• A. Bryan's public key; Bryan's public key
• B. Alice's public key; Alice's public key
• C. Bryan's private key; Alice's public key
• D. Bryan's public key; Alice's public key

Correct answer: D

Explanation

The correct answer is D because Alice encrypts the message using Bryan's public key so only he can decrypt it with his private key. Bryan verifies the digital signature using Alice's public key, ensuring the authenticity of the message. The other options incorrectly suggest using the wrong keys for encryption and signature verification.