In SSL protocol handshake both sides generate the same encryption key which is then used for the session. It is done following this procedure, in general: Client & server generate each a random value and send to each other. Server sends the public key to the client. In SSL/TLS, the two communicating parties (the client and the server) generate 4 session keys at the start of any communication session, during the TLS handshake. The official RFC for TLS does not actually call these keys 'session keys', but functionally that's exactly what they are. What is a session? A session is essentially a conversation.
Session Keys
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Server and client now have a 'session key' which only the two parties know about. They now use this session key to encrypt all messages belonging to this session. I found a question Here talking about where this SSL symmetric key (session key) is stored on the Server side.
The Transport Layer Security (TLS) Handshake Protocol is responsible for the authentication and key exchange necessary to establish or resume secure sessions. When establishing a secure session, the Handshake Protocol manages the following:
The client and server make contact and choose the cipher suite that will be used throughout their message exchange.
In TLS, a server proves its identity to the client. The client might also need to prove its identity to the server. PKI, the use of public/private key pairs, is the basis of this authentication. The exact method used for authentication is determined by the cipher suite negotiated.
The client and server exchange random numbers and a special number called the Pre-Master Secret. These numbers are combined with additional data permitting client and server to create their shared secret, called the Master Secret. The Master Secret is used by client and server to generate the write MAC secret, which is the session key used for hashing, and the write key, which is the session key used for encryption.
The TLS Handshake Protocol involves the following steps:
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The client sends a 'Client hello' message using the Session ID of the session to be resumed.
The server checks its session cache for a matching Session ID. If a match is found, and the server is able to resume the session, it sends a 'Server hello' message with the Session ID.
Note
If a session ID match is not found, the server generates a new session ID and the TLS client and server perform a full handshake.
Client and server must exchange 'Change cipher spec' messages and send 'Client finished' and 'Server finished' messages.
Client and server can now resume application data exchange over the secure channel. Generating ssh keys for windows.