now consider a variation of the KDC scenario above. the key distribution mechanism works as follows: 1 Alice chooses a shared key Ks for a session with Bob. Alice encrypts Ks with the key that she shares with the KDC,(Ka-kdc)and sends thr followING message to the KDC: A,B,Ka-kdc(Ks) 2 The KDC sends the following message back to A: Kb-kdc(Ks) 3 Alice encrypts the message (m) that she wants to send to Bob using the session key Ks,and then sends the encrypted message as well as the message from step 2 to Bob : Ks(m),Kb-kdc(Ks) 4 Bob retrieves the session key and then the message now consider an adversary Trudy who also shared a key with the KDC server,Kt-kdc,and we denote the identity of Trudy by T. Consider the scenario where Alice wants to share a session key with Bob.Trudy wants to impersonate Bob and we assume that Trudy can intercept and modify all message that Alice sends or receives. show how Trudy can successfully execute such as attack.