Kerberos is a computer$-$network authentication protocol that works on the basis of tickets to allow nodes communicating over a non$-$secure network to prove their identity to one another in a secure manner. Which of the following statements about Kerberos is true?

Each Client $($C$)$ initially shares a secret key with the Key Distribution Center $($KDC$)$

Kerberos uses RSA digital signature scheme for user authentication.

Each Server $($S$)$ initially shares a secret key with TGS$.$

Each Clinet $($C$)$ initially shares a secret key with each Server $($S$).$

Kerberos uses RSA to encrypt the messages exchanged between the client and the server.

The session key is generated by the Key Distribution Center $($KDC$)$