Question $20$

$1$

Which key combination would the recipient of a message use to confirm the integrity of the message as well as the authenticity of the sender$?$

The sender$\text{'}$s public key and the recipient's private key

The sender$\text{'}$s public key and the recipient's public key

The sender$\text{'}$s private key and the recipient's public key

The sender$\text{'}$s private key and the recipient's private key