Suppose that Alice and Bob need to communicate, and have decided to use asymmetric (public key) encryption.

a. Using only asymmetric encryption algorithms, describe a process that would allow Alice to send a message that can only be read by Bob. You should also include any steps taken by Bob that allow him to read the message.

b. Using only asymmetric encryption algorithms, describe a process that would allow Alice to send a message that Bob could be confident was sent by Alice. You should also include any steps taken by Bob to determine whether or not Alice actually sent the message.

c. Using only asymmetric encryption algorithms, describe a process that would allow Alice to send a message that can only be read by Bob, and that Bob could be confident was sent by Alice. You should include any steps taken by Bob to read the message, or to determine whether Alice actually sent the message.