Secure Sockets Layer
US /sɪˌkjʊr ˈsɑːkɪts ˈleɪər/
UK /sɪˌkjʊr ˈsɑːkɪts ˈleɪər/

1.
a standard security technology for establishing an encrypted link between a web server and a browser, ensuring that all data passed between them remains private and integral
:
•
Websites using Secure Sockets Layer display a padlock icon in the browser.
•
Many online transactions are protected by Secure Sockets Layer encryption.