Certified Ethical Hacker (CEH v13) — Question 28

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 in PGP, John must encrypt the message using Marie's public key, allowing only her private key to decrypt it. Options A and B are incorrect because John's keys do not provide security for Marie's access. Option C is wrong as using Marie's private key would not be appropriate for encrypting messages intended for her.