Stream Ciphers in Practice

1. SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are two security protocols that encrypt the communication between a user (and a user's browser) and a web server.
   Facts about SSL/TLS:
   • TLS is an updated, more secure successor of SSL.
   • Release versions for SSL are 1.0 (never used due to security issues), 2.0 (released in 1995 and deprecated in 2011), and 3.0 (released in 1996 and deprecated in 2015.)
   • Release versions for TLS are 1.0 (released in 1999 and deprecated in 2021), 1.1 (released in 2006 and deprecated in 2021), 1.2 (released in 2008 and is still in use,) and 1.3 (released in 2018 and is still in use.)
   • The letter 'S' in HTTPS stands for 'secure'. HTTPS is the combination of the HTTP protocol, which governs information exchange over the internet, and either the SSL or TLS protocols.
   • All the versions of SSL were deprecated due to security issues, and websites should use TLS for communication encryption.