Suppose a client host M wants to obtain secure connections with a web server N. They use the Certificate Authority host (CA) to implement the public key distribution. Server N has been certificated by the CA.
After client M sets up connection to N, it will verify the identity of server N. Please show the steps how client M and server N communicate after the TCP connection being set up.
Point out what is the formula of digital certificate of the server N.
Note that we denote the public and private keys of server N as K+ N KN,
and the public/private keys of CA are denoted as K+ CA KCA.