What is significance of following Base Key in TLS1.3 draft (28).
So far I understand
server_handshake_traffic_secret should be private key using which certificate has been acquired.
client_application_traffic_secret_N should be symmetric keys established after the handshake where N denotes number of up-gradation in keys after handshake.
Please suggest correction and explanation for client_handshake_traffic_secret . Thanks.