Session resumption – Transport Layer Security at a Glance

6.5.3 Session resumption Establishing the value of the PreMasterSecret is computationally the most expensive part of the handshake because it involves public-key cryptography. TLS therefore includes a session resumption mechanism, where a client and server can reuse an already established session, including the cipher suite and the MasterSecret derived from PreMasterSecret. The client initiates the…