Certified Ethical Hacker (CEH v11) — Question 185

John wants to send Marie an email that includes sensitive information, and he does not trust the network that he is connected to. Marie gives him the idea of using
PGP. What should John do to communicate correctly using this type of encryption?

Answer options

• A. Use his own private key to encrypt the message.
• B. Use his own public key to encrypt the message.
• C. Use Marie's private key to encrypt the message.
• D. Use Marie's public key to encrypt the message.

Correct answer: D

Explanation

The correct answer is D because John should use Marie's public key to encrypt the message, ensuring that only she can decrypt it with her private key. Options A and B are incorrect because using his own keys would not secure the message for Marie. Option C is also wrong since encrypting with Marie's private key would compromise the security of the message.