The following cryptographic protocol provides authentication and key exchange Create a diagram of the messages exchanged between the communicating parties. Make sure to number the messages and show the mathematical expression for encryption, decryption, etc. Alice concatenates her name and a random number RA, and sends it to Bob. Bob concatenates Alice's name, Alice's random number RA, his own random number RB, and encrypts it with the key he shares with Trent(K_BobTrent).He sends this to Trent along with his name. Trent generates two messages and sends both messages to Alice. The first consists of Bob's name, a random session keyK, Alice's random number RA, and Bob's random number RB, all encrypted with the key he shares with Alice(K_AliceTrent). The second consists of Alice's name and the random session key K, encrypted with the key he shares with Bob (K_BobTrent). Alice decrypts the first message, extracts K, and confirms that RA has the same value as it did in step (1). Alice sends Bob two messages: The first is the message received from Trent, encrypted with Bob's key. The second is RB encrypted with the session key K. Bob decrypts the message encrypted with his key, extracts K, and confirms that RB has the same value as it did in step (2)