Understanding Cisco Cybersecurity Fundamentals (SECFND, legacy) — Question 90

To provide origin authentication, the sender encrypts the message using an asymmetric encryption algorithm. In this case, the receiver of the message must use what to decrypt the message?

Answer options

• A. sender’s digital signature
• B. sender’s shared key
• C. sender’s private key
• D. sender’s public key

Correct answer: D

Explanation

The correct answer is D, the sender’s public key, which is used to decrypt messages that were encrypted with the sender's private key. Options A and B are incorrect because a digital signature and a shared key are not used for this decryption process. Option C is wrong as the sender’s private key is used for encryption, not decryption.