https://wiki.openssl.org/index.php/SSL_and_TLS_Protocols : Session Resumption
the protocol provides ways to reuse existing credentials to reissue new secret keys for new connections ( new TCP connections ) or to renew existing connections.
As per OpenSSL wiki: we can re-issue the secret key which was derived from master secret using session resumption.
I use session ticket-based session resumption. How can I re-issue the secret keys from the existing credentials?