Which of the following five security services are implemented by the protocol given below, assuming that the session key KAB is generated at random by the sender$,$ and both parties and an attacker have access to certificates of all users in the network. For any security services that are not implemented, explain why they are not implemented.

Protocol:

A sends to $B$

$A,E(P{R}_A,K_{AB}||h(M)),E(K_{AB},M||h(M)),B$

B sends to $A$

$B,E(K_{AB},h(M)),A$

Notation:

$x$ represents a unique name of user $x,$ where $x=A$ or $B$

$M$ means a message $($the same in both transfers$)$

$(M||x)$ means $M$ concatenetad with $x$

$E(P{U}_Y,Z)$ means $Z$ encrypted using a public key of $Y$

$E(P{R}_Y,Z)$ means $Z$ encrypted using a private key of $Y$

$E(K_{AB},Z)$ means $Z$ encrypted using a secret key $K_{AB}$

$h(M)$ means a hash value of $M.$

Security services:

C$-$Confidentiality

AS $-$ Authentication of the Sender

AR $-$ Authentication of the Receiver

NS $-$ Non$-$repudiation of the Sender

NR $-$ Non$-$repudiation of the Receiver