CompTIA Security+ (SY0-501) — Question 901

Joe, a user, wants to send Ann, another user, a confidential document electronically. Which of the following should Joe do to ensure the document is protected from eavesdropping?

Answer options

• A. Encrypt it with Joe's private key
• B. Encrypt it with Joe's public key
• C. Encrypt it with Ann's private key
• D. Encrypt it with Ann's public key

Correct answer: D

Explanation

The correct answer is D because encrypting the document with Ann's public key ensures that only Ann can decrypt it with her private key, thereby maintaining confidentiality. Options A and B are incorrect as they involve Joe's keys, which would not secure the document for Ann's access, while option C is incorrect because encrypting with Ann's private key is not feasible for secure communication.