Judge this protocol. Select all that apply.

Alice $to$ Bob $-$ I'mAlice, $\{R{\}}_{\text{B}\text{o}\text{b}}$

Bob $to$ Alice $-\{R,K_s{\}}_{\text{A}\text{l}\text{i}\text{c}\text{e}}$

Alice $to$ Bob $-\{R+1{\}}_{\text{A}\text{l}\text{i}\text{c}\text{e}}$

Where R is the nonce, $K_s$ is the session key.

$\{dots\}$ is encryption with specified PUBLIC key.

$[...]$ is encryption with specified PRIVATE key.

Alice is authenticated

Bob is authenticated

A Replay Attack is possible

Session key Ks is protected