SSL/TLS context
The exchange of protected messages in an SSL/TLS session takes place within a security context, established by the communicating parties at the beginning of a secure communications session and discarded at the end of the session. A security context is information shared by the participants for:
Authenticating the identity of the communicating parties at the beginning of the secure communications session and protecting that identity until the session closing.
Protecting the integrity, authenticity (optional), and confidentiality (optional) of exchanged messages.
Authenticating the identity of a message's sender through a digital signature.
Protecting the confidentiality of messages through encryption techniques.