Information Security Stack Exchange is a question and answer site for information security professionals. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. In tls 1. However, if it is true that there is only one session in one connection, why TLS can renegotiate within an existing connection to create new session, and can we use session resumption to refresh keys in an existing connection since the resumed session is not a new session? There is no problem in having several sessions on a single connection -- of course not simultaneously, but if, within a connection, a new handshake is performed a "renegotiation" , then that new handshake may resume an existing session, including the one which was active before that new handshake.
How can we maintain session between Web Client and Web Server?
A typical HTTP session - HTTP | MDN
This is done mostly for simplicity's sake. All messages delivered by the TWS are usually accompanied by a brief but meaningful description pointing in the direction of the problem. It is your responsibility to provide reliable connectivity between the TWS and your client application. The messages in the table below are not a consequence of any action performed by the client application.
File Transfer Resume
With S3 protocol, transfer can be resumed only immediately by reconnecting a lost session, not later. WinSCP is able to store file being transferred to temporary filename first, renaming it to the target name only once the transfer successfully finishes. For performance reasons transfer to temporary file name is enabled by default for files larger than a given threshold. The threshold is initially KB.