Consider the following authentication protocol. R is the cha…

Consider the following authentication protocol. R is the challenge sent by Bob to Alice, and K_ab is the secret Alice and Bob share. Which of the following values are secure to be used as a session key between Alice and Bob to exchange data? Choose all that apply. Remind a good session has the following properties:  it should differ in each session it should not be easily guessed by the attacker even if the session key is revealed by the attacker, it should not help the attacker to infer any other secrets.  it should not be a value that may be emitted by Alice or Bob, however they are being tricked by the attacker.