Transport layer security (TLS) is the modern version of the now-deprecated secure socket layer (SSL) protocol. Due to multiple vulnerabilities within SSL, organizations require a more robust protocol to coincide with the increasing number of web-based technologies. For example, unlike SSL, TSL allows you to negotiate encryption on regular ports and protocols such as IMAP and POP. This enables secure communication over a wide range of ports and protocols.

This has led to TLS becoming the standard practice for transmitting data between web clients and servers. This cryptographic protocol secures your data with a layer of encryption as it is transmitted over the internet.