Question

Richard wants to digitally sign a message he's sending to Sue so that Sue can be sure the message came from him without modification while in transit. Which key should he use to encrypt the message digest?A. Richard's public keyB. Richard's private keyC. Sue's public keyD. Sue's private key

Answer 1

B. Richard's private key

Step-by-step explanation:

Digital sign verifies the identity of the sender and ensures that the message didn't change on the way. The process goes as follows:

1. Richard signs his message digitally by using his private key
2. Sue can verify the sign by using Richards public key.