Question

For messages sent through an insecure channel, a properly implemented digital signature gives the receiver reason to believe the message was sent by the claimed sender. While using a digital signature, the message digest is encrypted with which key?

Answer 1

Prevents either sender or receiver from denying a transmitted message. When a message is sent the receiver can prove that the alleged sender sent the message. Similarly, when a message is received, the sender can prove that the alleged receiver received the message.