Editing Handshake (computing) (section)

=== TLS handshake ===
{{Main|Transport Layer Security#TLS handshake}}
When a [[Transport Layer Security]] (SSL or TLS) connection starts, the record encapsulates a "control" protocol—the handshake messaging protocol  (content type 22). This protocol is used to exchange all the information required by both sides for the exchange of the actual application data by TLS. It defines the messages formatting or containing this information and the order of their exchange. These may vary according to the demands of the client and server—i.e., there are several possible procedures to set up the connection. This initial exchange results in a successful TLS connection (both parties ready to transfer application data with TLS) or an alert message (as specified below).

The protocol is used to negotiate the secure attributes of a session. (RFC 5246, p.&nbsp;37)<ref>{{cite IETF |rfc=5246 |title=The Transport Layer Security (TLS) Protocol, version 1.2 |publisher=[[IETF]] |date=August 2008 }}</ref>