Certified Ethical Hacker (CEH v12) — Question 40

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 choice is D, as John must encrypt the message with Marie's public key to ensure that only she can decrypt it with her private key. Option A is incorrect because using his own private key does not secure the message for Marie. Option B is wrong because encrypting with his own public key would not allow Marie to read it. Option C is also incorrect, as he cannot use Marie's private key to encrypt the message.