Consider the authentication protocol below, which is based on knowledge of a shared 4-digit PIN number. Here, -K PIN = h(PIN). Suppose that Trudy passively observes one iteration of the protocol. Can...

Consider the authentication protocol below, which is based on knowledge of a shared 4-digit PIN number. Here, -K_PIN
= h(PIN).

Suppose that Trudy passively observes one iteration of the protocol. Can she then determine the 4-digit PIN? Justify your answer.