About

SSL is a cryptographic protocol that enables secure communication between applications connected through the Web.

TLS

TLS is the successor to SSL that brings for instance the server name in the loop.

S protocol

All other protocols that end with an S run over a SSL/TLS secured connection.

Example:

• HTTPS (Secure HTTP) (Secure communication with websites) is based on SSL/TLS.
• SMTPTS: Smtp over SSL