CompTIA Security+ (SY0-601) — Question 7

Digital signatures use asymmetric encryption. This means the message is encrypted with:

Answer options

• A. the sender's private key and decrypted with the sender's public key.
• B. the sender's public key and decrypted with the sender's private key.
• C. the sender's private key and decrypted with the recipient's public key.
• D. the sender's public key and decrypted with the recipient's private key.

Correct answer: A

Explanation

The correct answer is A because digital signatures utilize the sender's private key to encrypt the message, ensuring that only the sender can create the signature. The recipient can verify the signature using the sender's public key, which proves the authenticity of the message. The other options are incorrect as they misuse the roles of public and private keys in the context of digital signatures.